[Federal Register: April 18, 2005 (Volume 70, Number 73)]
[Proposed Rules]
[Page 20080-20082]
From the Federal Register Online via GPO Access [wais.access.gpo.gov]
[DOCID:fr18ap05-13]
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DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA-2005-20969; Directorate Identifier 2005-NM-017-AD]
RIN 2120-AA64
Airworthiness Directives; Raytheon Model DH.125, HS.125, and
BH.125 Series Airplanes; Model BAe.125 Series 800A (C-29A and U-125),
800B, 1000A, and 1000B Airplanes; and Model Hawker 800 (including
variant U-125A), and 1000 Airplanes
AGENCY: Federal Aviation Administration (FAA), Department of
Transportation (DOT).
ACTION: Notice of proposed rulemaking (NPRM).
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SUMMARY: The FAA proposes to supersede an existing airworthiness
directive (AD) that applies to certain Raytheon airplanes identified
above. The existing AD currently requires a visual inspection to
determine whether adequate clearance exists between the fan venturi
motor casing and the adjacent equipment, and adjustments, if necessary;
and a visual inspection to detect signs of overheating, degradation of
insulating materials, and ingestion of debris into the motor, and
replacement of discrepant parts with serviceable parts. This proposed
AD would instead require that operators replace the fan venturi with a
new or modified part. This proposed AD is prompted by reports that the
fan venturi overheated and produced smoke while the airplane was on the
ground. We are proposing this AD to prevent heat and fire damage to
equipment adjacent to the fan venturi, which could result in smoke in
the cabin and/or burning equipment.
DATES: We must receive comments on this proposed AD by June 2, 2005.
ADDRESSES: Use one of the following addresses to submit comments on
this proposed AD.
[[Page 20081]]
DOT Docket Web site: Go to http://dms.dot.gov and follow
the instructions for sending your comments electronically.
Government-wide rulemaking Web site: Go to http://www.regulations.gov
and follow the instructions for sending your
comments electronically.
Mail: Docket Management Facility; U.S. Department of
Transportation, 400 Seventh Street SW., Nassif Building, Room PL-401,
Washington, DC 20590.
Fax: (202) 493-2251.
Hand Delivery: Room PL-401 on the plaza level of the
Nassif Building, 400 Seventh Street SW., Washington, DC, between 9 a.m.
and 5 p.m., Monday through Friday, except Federal holidays. For service
information identified in this proposed AD, contact Raytheon Aircraft
Company, Department 62, P.O. Box 85, Wichita, Kansas 67201-0085.
You can examine the contents of this AD docket on the Internet at
http://dms.dot.gov, or in person at the Docket Management Facility,
U.S. Department of Transportation, 400 Seventh Street SW., Room PL-401,
on the plaza level of the Nassif Building, Washington, DC. This docket
number is FAA-2005-20969; the directorate identifier for this docket is
2005-NM-017-AD.
FOR FURTHER INFORMATION CONTACT: Philip Petty, Aerospace Engineer,
Electrical Systems and Avionics Branch, ACE-119W, FAA, Wichita Aircraft
Certification Office, 1801 Airport Road, Room 100, Mid-Continent
Airport, Wichita, Kansas 67209; telephone (316) 946-4139; fax (316)
946-4107.
SUPPLEMENTARY INFORMATION:
Comments Invited
We invite you to submit any relevant written data, views, or
arguments regarding this proposed AD. Send your comments to an address
listed under ADDRESSES. Include ``Docket No. FAA-2005-20969;
Directorate Identifier 2005-NM-017-AD'' at the beginning of your
comments. We specifically invite comments on the overall regulatory,
economic, environmental, and energy aspects of the proposed AD. We will
consider all comments received by the closing date and may amend the
proposed AD in light of those comments.
We will post all comments we receive, without change, to http://dms.dot.gov
, including any personal information you provide. We will
also post a report summarizing each substantive verbal contact with FAA
personnel concerning this proposed AD. Using the search function of our
docket Web site, anyone can find and read the comments in any of our
dockets, including the name of the individual who sent the comment (or
signed the comment on behalf of an association, business, labor union,
etc.). You can review the DOT's complete Privacy Act Statement in the
Federal Register published on April 11, 2000 (65 FR 19477-78), or you
can visit http://dms.dot.gov.
Examining the Docket
You can examine the AD docket on the Internet at http://dms.dot.gov
, or in person at the Docket Management Facility office
between 9 a.m. and 5 p.m., Monday through Friday, except Federal
holidays. The Docket Management Facility office (telephone (800) 647-
5227) is located on the plaza level of the Nassif Building at the DOT
street address stated in the ADDRESSES section. Comments will be
available in the AD docket shortly after the DMS receives them.
Discussion
On May 18, 1994, we issued AD 94-11-03, amendment 39-8919 (59 FR
27231, May 26, 1994), for certain Raytheon Corporate Jets Model DH/BH/
HS BAe 125 and Hawker 800 and 1000 series airplanes. That AD requires a
visual inspection to determine whether adequate clearance exists
between the fan venturi motor casing and the adjacent equipment, and
adjustments, if necessary; and a visual inspection to detect signs of
overheating, degradation of insulating materials, and ingestion of
debris into the motor, and replacement of discrepant parts with
serviceable parts. That AD was prompted by reports of smoke emanating
from the lavatory due to overheating of the fan venturi motor. We
issued that AD to prevent smoke or fire in the cabin while the airplane
is in flight.
Actions Since Existing AD Was Issued
Since we issued AD 94-11-03, there have been three additional
reports indicating that the fan venturi overheated and produced smoke
while the airplane was on the ground. The manufacturer investigated the
incidents and found that contamination and corrosion in the fan venturi
bearings can jam the rotating assembly and cause the motor to burn out.
The airplanes on which the incidents occurred had been inspected and/or
repaired in accordance with AD 94-11-03. These further incidents
indicate that the actions in AD 94-11-03 may not be adequate.
Relevant Service Information
We have reviewed Raytheon Service Bulletin SB 21-3669, dated
December 2004. The service bulletin describes procedures for two
options for corrective action:
Option 1: Replacing the fan venturi with a new fan venturi; or
Option 2: Modifying the fan venturi.
The new or modified fan venturi has a larger bearing area with more
lubricant to dissipate heat, higher temperature range lubricant,
tighter tolerance bearing parts, and thermal protection. Accomplishing
the actions specified in the service information is intended to
adequately address the unsafe condition.
The Raytheon Service Bulletin refers to Honeywell Service Bulletin
132322-21-4041, Revision 2, dated August 20, 2004, as an additional
source of service information for modifying the fan venturi motor
assembly. The Honeywell service bulletin is attached to the Raytheon
service bulletin.
FAA's Determination and Requirements of the Proposed AD
The unsafe condition described previously is likely to exist or
develop on other airplanes of the same type design that may be
registered in the U.S. at some time in the future. We are proposing to
supersede AD 94-11-03. This proposed AD would not retain the
requirements of the existing AD. This proposed AD would require
accomplishing the actions specified in the service bulletins described
previously.
Explanation of Change to Model Designation
We have revised the effectivity of the proposed AD to identify
model designations as published in the most recent type certificate
data sheet for the affected models.
Costs of Compliance
There are about 500 airplanes of the affected design worldwide.
This proposed AD would affect about 350 airplanes of U.S. registry. The
following table provides the estimated costs for U.S. operators to
comply with this proposed AD.
[[Page 20082]]
Estimated Costs
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Average labor Cost per hour
Action hour Work hours rate per Parts airplane
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Option 1: Replacement........................... 4 $65 $12,487 $12,747
Option 2: Modification.......................... 8 65 2,269 2,789
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Authority for This Rulemaking
Title 49 of the United States Code specifies the FAA's authority to
issue rules on aviation safety. Subtitle I, Section 106, describes the
authority of the FAA Administrator. Subtitle VII, Aviation Programs,
describes in more detail the scope of the Agency's authority.
We are issuing this rulemaking under the authority described in
Subtitle VII, Part A, Subpart III, Section 44701, ``General
requirements.'' Under that section, Congress charges the FAA with
promoting safe flight of civil aircraft in air commerce by prescribing
regulations for practices, methods, and procedures the Administrator
finds necessary for safety in air commerce. This regulation is within
the scope of that authority because it addresses an unsafe condition
that is likely to exist or develop on products identified in this
rulemaking action.
Regulatory Findings
We have determined that this proposed AD would not have federalism
implications under Executive Order 13132. This proposed AD 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.
For the reasons discussed above, I certify that the 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. 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.
We prepared a regulatory evaluation of the estimated costs to
comply with this proposed AD. See the ADDRESSES section for a location
to examine the regulatory evaluation.
List of Subjects in 14 CFR Part 39
Air transportation, Aircraft, Aviation safety, Safety.
The Proposed Amendment
Accordingly, under the authority delegated to me by the
Administrator, the FAA proposes to amend 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. The FAA amends Sec. 39.13 by removing amendment 39-8919 (59 FR
27231, May 26, 1994) and adding the following new airworthiness
directive (AD):
Raytheon Aircraft Company: Docket No. FAA-2005-20969; Directorate
Identifier 2005-NM-017-AD.
Comments Due Date
(a) The Federal Aviation Administration must receive comments on
this AD action by June 2, 2005.
Affected ADs
(b) This AD supersedes AD 94-11-03, amendment 39-8919 (59 FR 27231,
May 26, 1994).
Applicability
(c) This AD applies to Raytheon Model DH.125, HS.125, and BH.125
series airplanes; Model BAe.125 Series 800A (C-29A and U-125), 800B,
1000A, and 1000B airplanes; and Model Hawker 800 (including variant U-
125A), and 1000 airplanes, certificated in any category; as identified
in Raytheon Service Bulletin SB 21-3669, dated December, 2004.
Unsafe Condition
(d) This AD was prompted by reports indicating that the fan venturi
overheated and produced smoke while the airplane was on the ground. We
are issuing this AD to prevent heat and fire damage to equipment
adjacent to the fan venturi, which could result in smoke in the cabin
and/or burning equipment.
Compliance
(e) You are responsible for having the actions required by this AD
performed within the compliance times specified, unless the actions
have already been done.
Modification or Replacement
(f) Within 1,200 flight hours or 24 months after the effective date
of this AD, whichever occurs first, do the action in either paragraph
(f)(1) or (f)(2) of this AD in accordance with the Accomplishment
Instructions of Raytheon Service Bulletin SB 21-3669, dated December,
2004.
(1) Modify the existing fan venturi part number (P/N) 132322-2-1 by
installing an improved motor, P/N 207640-34.
(2) Replace the existing fan venturi P/N 132322-2-1 with a new fan
venturi P/N 132322-3-1.
Note 1: Raytheon Service Bulletin SB 21-3669 refers to Honeywell
Service Bulletin 132322-21-4041, Revision 2, dated August 20, 2004,
as an additional source of service information for doing the
modification. The Honeywell service bulletin is attached to the
Raytheon service bulletin.
Parts Installation
(g) As of the effective date of this AD, no person may install a
fan venturi, P/N 132322-2-1, on any airplane unless the fan venturi has
been modified in accordance with paragraph (f)(1) of this AD; or unless
the fan venturi has a new P/N in accordance with paragraph (f)(2) of
this AD.
Alternative Methods of Compliance (AMOCs)
(h) The Manager, Wichita Aircraft Certification Office (ACO), FAA,
has the authority to approve AMOCs for this AD, if requested in
accordance with the procedures found in 14 CFR 39.19.
Issued in Renton, Washington, on April 12, 2005.
Ali Bahrami,
Manager, Transport Airplane Directorate, Aircraft Certification
Service.
[FR Doc. 05-7673 Filed 4-15-05; 8:45 am]
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