[Federal Register: July 17, 2003 (Volume 68, Number 137)]
[Proposed Rules]
[Page 42317-42322]
From the Federal Register Online via GPO Access [wais.access.gpo.gov]
[DOCID:fr17jy03-21]
-----------------------------------------------------------------------
DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. 2003-NM-40-AD]
RIN 2120-AA64
Airworthiness Directives; Boeing Model 747-400, 747-400D, 747-
400F, 757-200, 757-200PF, 757-200CB, 767-200, 767-300, and 767-300F
Series Airplanes
AGENCY: Federal Aviation Administration, DOT.
ACTION: Notice of proposed rulemaking (NPRM).
-----------------------------------------------------------------------
SUMMARY: This document proposes the adoption of a new airworthiness
directive (AD) that is applicable to certain Boeing transport category
airplane models, as listed above. This proposal would require a
modification of the air data computer (ADC) system, which involves
installing certain new circuit breakers, relays, and related
components, and making various wiring changes in and between the flight
deck and main equipment center. For certain
[[Page 42318]]
airplanes, this proposal also would require accomplishment of various
other actions prior to or concurrently with the modification of the ADC
system. This action is necessary to ensure that the flightcrew is able
to silence an erroneous overspeed or stall aural warning. A persistent
erroneous warning could confuse and distract the flightcrew and lead to
an increase in the flightcrew's workload. Such a situation could lead
the flightcrew to act on hazardously misleading information, which
could result in loss of control of the airplane. This action is
intended to address the identified unsafe condition.
DATES: Comments must be received by September 2, 2003.
ADDRESSES: Submit comments in triplicate to the Federal Aviation
Administration (FAA), Transport Airplane Directorate, ANM-114,
Attention: Rules Docket No. 2003-NM-40-AD, 1601 Lind Avenue, SW.,
Renton, Washington 98055-4056. Comments may be inspected at this
location between 9 a.m. and 3 p.m., Monday through Friday, except
Federal holidays. Comments may be submitted via fax to (425) 227-1232.
Comments may also be sent via the Internet using the following address:
9-anm-nprmcomment@faa.gov. Comments sent via fax or the Internet must
contain ``Docket No. 2003-NM-40-AD'' in the subject line and need not
be submitted in triplicate. Comments sent via the Internet as attached
electronic files must be formatted in Microsoft Word 97 or 2000 or
ASCII text.
The service information referenced in the proposed rule may be
obtained from Boeing Commercial Airplane Group, P.O. Box 3707, Seattle,
Washington 98124-2207. This information may be examined at the FAA,
Transport Airplane Directorate, 1601 Lind Avenue, SW., Renton,
Washington.
FOR FURTHER INFORMATION CONTACT: Elizabeth Zurcher, Aerospace Engineer,
Systems and Equipment Branch, ANM-130S, FAA, Seattle Aircraft
Certification Office, 1601 Lind Avenue, SW., Renton, Washington 98055-
4056; telephone (425) 917-6495; fax (425) 917-6590.
SUPPLEMENTARY INFORMATION:
Comments Invited
Interested persons are invited to participate in the making of the
proposed rule by submitting such written data, views, or arguments as
they may desire. Communications shall identify the Rules Docket number
and be submitted in triplicate to the address specified above. All
communications received on or before the closing date for comments,
specified above, will be considered before taking action on the
proposed rule. The proposals contained in this action may be changed in
light of the comments received.
Submit comments using the following format:
[sbull] Organize comments issue-by-issue. For example, discuss a
request to change the compliance time and a request to change the
service bulletin reference as two separate issues.
[sbull] For each issue, state what specific change to the proposed
AD is being requested.
[sbull] Include justification (e.g., reasons or data) for each
request.
Comments are specifically invited on the overall regulatory,
economic, environmental, and energy aspects of the proposed rule. All
comments submitted will be available, both before and after the closing
date for comments, in the Rules Docket for examination by interested
persons. A report summarizing each FAA-public contact concerned with
the substance of this proposal will be filed in the Rules Docket.
Commenters wishing the FAA to acknowledge receipt of their comments
submitted in response to this action must submit a self-addressed,
stamped postcard on which the following statement is made: ``Comments
to Docket Number 2003-NM-40-AD.'' The postcard will be date stamped and
returned to the commenter.
Availability of NPRMs
Any person may obtain a copy of this NPRM by submitting a request
to the FAA, Transport Airplane Directorate, ANM-114, Attention: Rules
Docket No. 2003-NM-40-AD, 1601 Lind Avenue, SW., Renton, Washington
98055-4056.
Discussion
The FAA has received reports indicating that an erroneous overspeed
aural warning that cannot be silenced may occur on certain Boeing Model
747-400, 747-400D, 747-400F, 757-200, 757-200PF, 757-200CB, 767-200,
767-300, and 767-300F series airplanes. When the air data computer
(ADC) detects an overspeed condition, the ADC sends a warning through
the Engine Indicating and Crew Alerting System (EICAS) and aural
warning systems. If the flightcrew finds that this warning is
erroneous, following flightcrew procedures to eliminate the erroneous
ADC source will remove the erroneous air data source from the
flightcrew display and from use in computation of navigation and flight
control solutions, but the erroneous aural warning will not be
silenced. Inability to silence an erroneous warning could confuse and
distract the flightcrew, and lead to an increase in the flightcrew's
workload. An erroneous aural warning that cannot be silenced may also
cause the flightcrew to act based on misleading information. This may
have been a factor in previous airplane incidents in which flightcrew
actions based on hazardously misleading information have resulted in
loss of control of the airplane.
Explanation of Relevant Service Information
We have reviewed and approved the following Boeing Alert Service
Bulletins:
[sbull] 747-34A2460, Revision 2, dated June 14, 2001 (for Model
747-400, -400D, and -400F series airplanes), which describes procedures
for re-routing wires associated with ADC overspeed warnings to
eliminate erroneous overspeed warnings. The procedures involve
replacing the P1-1 and P3-1 module assemblies in the flight deck with
improved assemblies, installing various wires in and between the flight
deck and main equipment center of the airplane, and performing a test
of the source select module and a system functional test. This service
bulletin specifies that Boeing Service Bulletin 747-31-2179, 747-31-
2180, or 747-31-2217 must be accomplished either previously or
concurrently. Boeing Alert Service Bulletin 747-34A2460, Revision 2,
refers to Boeing Component Service Bulletins 233U2200-31-01 and
233U2205-31-01, both dated April 20, 1995, as additional sources for
instructions to change the ADC computer source select switch on the P1-
1 and P3-1 panels, respectively.
[sbull] 757-34A0222, dated March 28, 2002 (for Model 757-200,-
200PF, and -200CB series airplanes), which describes procedures for
installing a circuit breaker and replacing an existing lightplate
assembly with a new, improved lightplate assembly in the flight
compartment; installing two relays and removing a certain relay in the
main equipment center; making various wiring changes in the flight
compartment and main equipment center; and performing tests of the
flight data acquisition unit, flight data recorder system, and stall
and overspeed warnings. These changes are intended to allow the
flightcrew to silence an erroneous aural overspeed or stall warning by
switching away from a failed ADC that is generating the warning. This
service bulletin specifies that Boeing Service Bulletin 757-31-0059
must be accomplished either previously or concurrently.
[[Page 42319]]
[sbull] 767-34A0332, dated January 10, 2002 (for Model 767-200, -
300, and -300F series airplanes), which describes procedures for
installing two circuit breakers in the flight deck, installing two
relays in the main equipment center, making various wiring changes in
the flight deck and main equipment center, and doing a system
functional test. These changes are intended to allow the flightcrew to
silence an erroneous aural overspeed or stall warning by switching away
from a failed ADC that is generating the warning. This service bulletin
specifies that Boeing Service Bulletins 767-31-0091, 767-31-0098, 767-
31-0099, 767-31-0100, or 767-31-0101, as applicable, must be
accomplished either previously or concurrently.
Explanation of Other Related Service Information (747-400, -400D and
``400F)
We have reviewed and approved Boeing Service Bulletins 747-31-2179,
dated May 26, 1994 (for Boeing Model 747-400 and -400F series airplanes
equipped with Pratt & Whitney PW4000 series engines), and 747-31-2180,
dated March 17, 1994 (for Boeing Model 747-400 and -400F series
airplanes equipped with Rolls-Royce engines). These service bulletins
described procedures for replacing the three Electronic Flight
Information System (EFIS)/EICAS interface units (EIU) with improved
EIUs and installing new software in six integrated display units (IDU)
and three EIUs.
We have also reviewed and approved Boeing Service Bulletin 747-31-
2217, dated May 19, 1994 (for Boeing Model 747-400, -400D, and -400F
series airplanes equipped with General Electric (GE) engines). That
service bulletin describes procedures for installing new software in
six IDUs and three EIUs.
Boeing Service Bulletin 747-31-2217 specifies that the changes in
Boeing Service Bulletins 747-31-2178, dated July 1, 1993, and 747-45-
2010, dated December 17, 1992, must be accomplished prior to the
actions in Boeing Service Bulletin 747-31-2217. We have reviewed and
approved those service bulletins. Boeing Service Bulletin 747-31-2178
describes procedures for replacing three EIUs with improved EIUs and
installing new software in six IDUs and three EIUs. Boeing Service
Bulletin 747-45-2010 describes procedures for installing new software
in the central maintenance computer (CMC).
Boeing Service Bulletin 747-45-2010 specifies that, for airplanes
equipped with GE engines, the actions in Boeing Service Bulletins 747-
45-2005 and 747-31-2163 must be accomplished prior to or concurrently
with those specified in Boeing Service Bulletin 747-45-2010. We have
reviewed and approved those service bulletins. Boeing Service Bulletin
747-45-2005, dated February 8, 1990, describes procedures for a
modification that involves replacing certain CMCs with improved CMCs,
modifying related wiring, and modifying the data loader control panel.
Boeing Service Bulletin 747-31-2163, dated February 14, 1991, describes
procedures for installing new software in six IDUs and three EIUs.
Explanation of Other Related Service Information (757-200, -200CB, -
200PF; 767)
We also have reviewed and approved the following Boeing service
bulletins, which all describe procedures for performing an EICAS
readout comparison to ensure that the applicable software is used,
replacing the existing EICAS computers with new EICAS computers that
can be upgraded with certain software, and making related wiring
changes:
----------------------------------------------------------------------------------------------------------------
Boeing service bulletin (all Service bulletin
including Appendices A, B, and C)- revision level- Service bulletin date- Effectivity-
----------------------------------------------------------------------------------------------------------------
757-31-0059........................ Revision 3............ March 29, 2001........ Boeing Model 757-200, -
200CB, and -200PF series
airplanes.
767-31-0091........................ Revision 3............ April 27, 2000........ Model 767 series airplanes
with certain GE CF6-80C2
Full Authority Digital
Electronic Engine Control
(FADEC) series engines.
767-31-0098........................ Revision 2............ October 21, 1999...... Model 767-200 and -300
series airplanes with
certain GE Power
Management Computer (PMC)
engines.
767-31-0099........................ Revision 3............ February 8, 2001...... Model 767-300 series
airplanes with certain
Rolls Royce engines.
767-31-0100........................ Revision 2............ July 29, 1999......... Model 767 series airplanes
with certain Pratt &
Whitney PW4000 series
engines.
767-31-0101........................ Original.............. July 6, 2000.......... Model 767-200 and -300
series airplanes with
Pratt & Whitney JT9D
series engines.
----------------------------------------------------------------------------------------------------------------
Explanation of Requirements of Proposed Rule
Since an unsafe condition has been identified that is likely to
exist or develop on other products of this same type design, the
proposed AD would require accomplishment of the actions specified in
the applicable service bulletins described previously, except as
discussed below.
Differences Between Service Bulletins and Proposed AD
Operators should note that Boeing Alert Service Bulletins 747-
34A2460, Revision 2, 757-34A0222, and 767-34A0332 recommend
accomplishing the modification as soon as manpower, materials, and
facilities are available. We have determined that such a non-specific
compliance time would not address the identified unsafe condition in a
timely manner. In developing an appropriate compliance time for this
AD, we considered not only the manufacturer's recommendation, but the
degree of urgency associated with addressing the subject unsafe
condition, and the time necessary to perform the proposed actions. In
light of these factors, we find a 24-month compliance time for
completing the proposed actions to be warranted, in that it represents
an appropriate interval of time allowable for affected airplanes to
continue to operate without compromising safety.
Also, Boeing Service Bulletins 747-34A2460, Revision 2, and 757-
34A0222 specify that operators may accomplish certain actions per a
specific chapter of the Airplane Maintenance Manual (AMM) or an
``operator's equivalent procedure.'' However, this proposed AD would
require operators to accomplish the actions per the chapter of the AMM
specified in the service bulletin. An ``operator's equivalent
procedure'' may be used only if approved as an
[[Page 42320]]
alternative method of compliance per paragraph (e) of this AD.
Changes to 14 CFR Part 39/Effect on the Proposed AD
On July 10, 2002, we issued a new version of 14 CFR part 39 (67 FR
47997, July 22, 2002), which governs our airworthiness directives
system. This regulation now includes material that relates to altered
products, special flight permits, and alternative methods of compliance
(AMOCs). Because we have now included this material in part 39, only
the office authorized to approve AMOCs is identified in each individual
AD.
Explanation of Cost Impact
We have reviewed the figures we have used over the past several
years to calculate AD costs to operators. To account for various
inflationary costs in the airline industry, we find it necessary to
increase the labor rate used in these calculations from $60 per work
hour to $65 per work hour. The cost impact information, below, reflects
this increase in the specified hourly labor rate.
Cost Impact
There are approximately 1,872 airplanes of the affected designs in
the worldwide fleet. The FAA estimates that 36 Model 747-400, -400D,
and -400F series airplanes; 639 Model 757-200, -200CB, and -200PF
series airplanes; and 244 Model 767-200, -300, and -300F series
airplanes; of U.S. registry would be affected by this proposed AD.
Estimates of the costs to accomplish the proposed actions are provided
in the following table:
----------------------------------------------------------------------------------------------------------------
Work hours Hourly labor Parts cost Cost per
Service bulletin per airplane rate per airplane airplane
----------------------------------------------------------------------------------------------------------------
747-34A2460..................................... 158 $65 $1,448-$1,735 $11,718-$12,00
5
747-31-2179..................................... 2 65 None 130
747-31-2180..................................... 2 65 None 130
747-31-2217..................................... 2 65 None 130
747-31-2178..................................... 5 65 None 325
747-45-2010..................................... 2 65 None 130
747-45-2005..................................... 2 65 None 130
747-31-2163..................................... 2 65 None 130
757-34A0222..................................... 107 65 12,571-12,953 19,526-19,908
757-31-0059..................................... 5 65 None 325
767-34A0332..................................... 55 65 9,988-11,167 13,563-14,742
767-31-0091..................................... 7 65 None 455
767-31-0098..................................... 5 65 None 325
767-31-0099..................................... 24 65 None 1,560
767-31-0100..................................... 8 65 None 520
767-31-0101..................................... 6 65 None 390
----------------------------------------------------------------------------------------------------------------
We estimate that the total cost to accomplish all actions that may be
required for all airplanes that would be affected by this AD may be as
much as $17,783,875.
The cost impact figures discussed above are based on assumptions
that no operator has yet accomplished any of the proposed requirements
of this AD action, and that no operator would accomplish those actions
in the future if this proposed AD were not adopted. The cost impact
figures discussed in AD rulemaking actions represent only the time
necessary to perform the specific actions actually required by the AD.
These figures typically do not include incidental costs, such as the
time required to gain access and close up, planning time, or time
necessitated by other administrative actions.
Regulatory Impact
The regulations proposed herein would not have a substantial direct
effect on the States, on the relationship between the national
Government and the States, or on the distribution of power and
responsibilities among the various levels of government. Therefore, it
is determined that this proposal would not have federalism implications
under Executive Order 13132.
For the reasons discussed above, I certify that this proposed
regulation (1) is not a ``significant regulatory action'' under
Executive Order 12866; (2) is not a ``significant rule'' under the DOT
Regulatory Policies and Procedures (44 FR 11034, February 26, 1979);
and (3) if promulgated, will not have a significant economic impact,
positive or negative, on a substantial number of small entities under
the criteria of the Regulatory Flexibility Act. A copy of the draft
regulatory evaluation prepared for this action is contained in the
Rules Docket. A copy of it may be obtained by contacting the Rules
Docket at the location provided under the caption ADDRESSES.
List of Subjects in 14 CFR Part 39
Air transportation, Aircraft, Aviation safety, Safety.
The Proposed Amendment
Accordingly, pursuant to the authority delegated to me by the
Administrator, the Federal Aviation Administration proposes to amend
part 39 of the Federal Aviation Regulations (14 CFR part 39) as
follows:
PART 39--AIRWORTHINESS DIRECTIVES
1. The authority citation for part 39 continues to read as follows:
Authority: 49 U.S.C. 106(g), 40113, 44701.
Sec. 39.13 [Amended]
2. Section 39.13 is amended by adding the following new
airworthiness directive:
Boeing: Docket 2003-NM-40-AD.
Applicability: Airplanes as listed in Table 1 of this AD,
certificated in any category. Table 1 of this AD follows:
[[Page 42321]]
Table 1.--Applicability
----------------------------------------------------------------------------------------------------------------
Airplane Model-- As Listed in Boeing Alert Service Bulletin--
----------------------------------------------------------------------------------------------------------------
747-400, 747-400D, 747-400F series 747-34A2460, Revision 2, dated June 14, 2001.
airplanes.
757-200, 757-200PF, 757-200CB series 757-34A0222, dated March 28, 2002.
airplanes.
767-200, 767-300, and 767-300F series 767-34A0332, dated January 10, 2002.
airplanes.
----------------------------------------------------------------------------------------------------------------
Compliance: Required as indicated, unless accomplished
previously.
To ensure that the flightcrew is able to silence an erroneous
overspeed or stall aural warning, accomplish the following:
Modification of Air Data Computer System
(a) Within 24 months after the effective date of this AD, modify
the air data computer system, as specified in paragraph (a)(1),
(a)(2), or (a)(3) of this AD, as applicable.
(1) For Model 747-400, -400D, and -400F series airplanes: Re-
route wires associated with air data computer (ADC) overspeed
warnings, replace the P1-1 and P3-1 module assemblies in the flight
deck with improved module assemblies, install various wires in and
between the flight deck and main equipment center of the airplane,
and perform a test of the source select module and a system
functional test, according to Boeing Alert Service Bulletin 747-
34A2460, Revision 2, dated June 14, 2001.
Note 1: Boeing Service Bulletin 747-34A2460, Revision 2, refers
to Boeing Component Service Bulletins 233U2200-31-01 and 233U2205-
31-01, both dated April 20, 1995, as additional sources for
instructions to change the ADC computer source select switch on the
P1-1 and P3-1 panels, respectively.
(2) For Model 757-200, -200PF, and -200CB series airplanes:
Install a circuit breaker and replace an existing lightplate
assembly with a new, improved lightplate assembly in the flight
compartment; install two relays and remove a certain relay in the
main equipment center; make various wiring changes in the flight
compartment and main equipment center; and perform tests of the
flight data acquisition unit, flight data recorder system, and stall
and overspeed warnings. Do these actions according to Boeing Alert
Service Bulletin 757-34A0222, dated March 28, 2002.
(3) For Model 767-200, -300, and -300F series airplanes: Install
two circuit breakers in the flight deck, install two relays in the
main equipment center, make various wiring changes in the flight
deck and main equipment center, and do a system functional test,
according to Boeing Alert Service Bulletin 767-34A0332, dated
January 10, 2002.
Actions Required To Be Accomplished Prior to or Concurrently With
Paragraph (a)
(b) Prior to or concurrently with accomplishment of paragraph
(a) of this AD, accomplish paragraph (b)(1) or (b)(2) of this AD, as
applicable.
(1) For Boeing Model 747-400, -400D, and -400F series airplanes:
Do the actions specified in Table 2 of this AD, as applicable:
Table 2.--Boeing Model 747-400, -400D, and -400F Series Airplanes--Prior/Concurrent Actions
----------------------------------------------------------------------------------------------------------------
According to the
For airplanes listed in-- Accomplish all actions accomplishment
associated with-- instructions of--
-----------------------------------------------------------------------------------------
Boeing Service Bulletin 747-31-2179, Replacing the three Boeing Service Bulletin
dated May 26, 1994. Electronic Flight 747-31-2179.
Information System
(EFIS)/Engine
Indicating and Crew
Alerting System (EICAS)
interface units (EIU)
in the main equipment
center with improved
EIUs and installing new
software in six
integrated display
units (IDU) and three
EIUs.
Boeing Service Bulletin 747-31-2180, Replacing the three EIUs Boeing Service Bulletin
dated March 17, 1994. in the main equipment 747-31-2180.
center with improved
EIUs and installing new
software in six IDUs
and three EIUs.
Boeing Service Bulletin 747-31-2217 Installing new software Boeing Service Bulletin
dated May 19, 1994. in six IDUs and three 747-31-2217.
EIUs.
Boeing Service Bulletins 747-31-2217 Replacing three EIUs Boeing Service Bulletin
and 747-31-2178; and dated July 1, with improved EIUs and 747-31-2178.
1993. installing new software
in six IDUs and three
EIUs.
Boeing Service Bulletins 747-31-2217 Installing new software Boeing Service Bulletin
and 747-45-2010, dated December 17, in the central 747-45-2010.
1992. maintenance computer
(CMC).
Boeing Service Bulletins 747-31-2217 Replacing certain CMCs Boeing Service Bulletin
and 747-45-2005, dated February 8, with improved CMCs, 747-45-2005.
1990. modifying related
wiring, and modifying
the data loader control
panel.
Boeing Service Bulletins 747-31-2217 Installing new software Boeing Service Bulletin
and 747-31-2163, dated February 14, in six IDUs and three 747-31-2163.
1991. EIUs.
----------------------------------------------------------------------------------------------------------------
Replacement of EICAS Computers
(2) For airplanes identified in any of the service bulletins
listed in Table 3 of this AD: Prior to or concurrently with
accomplishment of the actions required by paragraph (a) of this AD,
accomplish all actions associated with replacing the existing EICAS
computers with improved EICAS computers, according to the applicable
service bulletin specified in Table 3 of this AD. The actions
include performing an EICAS readout comparison to ensure that the
applicable software is used; replacing the existing EICAS computers
with new, improved EICAS computers that can be upgraded with certain
software; and making related wiring changes. Table 3 of this AD
follows:
[[Page 42322]]
Table 3.--Service Bulletins for Replacement of EICAS Computers
------------------------------------------------------------------------
Boeing Service Bulletin (all
including Appendices A, B, and Service bulletin Service bulletin date--
C)-- revision level--
------------------------------------------------------------------------
757-31-0059................... Revision 3...... March 29, 2001.
767-31-0091................... Revision 3...... April 27, 2000.
767-31-0098................... Revision 2...... October 21,
[chyph]1999.
767-31-0099................... Revision 3...... February 8, 2001.
767-31-0100................... Revision 2...... July 29, 1999.
767-31-0101................... Original........ July 6, 2000.
------------------------------------------------------------------------
Parts Installation
(c) As of the effective date of this AD, no person may install,
on any airplane, a part having a part number listed in the
``Existing Part Number'' column of the table under paragraph 2.E. of
Boeing Alert Service Bulletin 747-34A2460, Revision 2, dated June
14, 2000; 757-31-0059, Revision 3, dated March 29, 2001; 767-31-
0091, Revision 3, dated April 27, 2000; 767-31-0098, Revision 2,
dated October 21, 1999; 767-31-0099, Revision 3, dated February 8,
2001; 767-31-0100, Revision 2, dated July 29, 1999; or 767-31-0101,
dated July 6, 2000; or under paragraph II.D. of Boeing Service
Bulletins 747-31-2179, dated May 26, 1994; 747-31-2180, dated March
17, 1994; 747-31-2178, dated July 1, 1993; 747-45-2010, dated
December 17, 1992; 747-45-2005, dated February 8, 1990; or 747-31-
2163, dated February 14, 1991.
Operator's ``Equivalent Procedure'
(d) Where Boeing Service Bulletins 747-34A2460, Revision 2,
dated June 14, 2000; and 757-34A0222, dated March 28, 2002; specify
that certain actions may be accomplished per an operator's
``equivalent procedure': These actions must be accomplished per the
chapter of the applicable Boeing 747 or 757 Airplane Maintenance
Manual specified in the applicable service bulletin. An operator's
``equivalent procedure'' cannot be used unless the operator receives
FAA approval for that procedure according to paragraph (e) of this
AD.
Alternative Methods of Compliance
(e) In accordance with 14 CFR 39.19, the Manager, Seattle
Aircraft Certification Office, FAA, is authorized to approve
alternative methods of compliance for this AD.
Issued in Renton, Washington, on July 11, 2003.
Ali Bahrami,
Acting Manager, Transport Airplane Directorate, Aircraft Certification
Service.
[FR Doc. 03-18082 Filed 7-16-03; 8:45 am]
BILLING CODE 4910-13-P