[Federal Register: February 20, 2003 (Volume 68, Number 34)]
[Proposed Rules]
[Page 8161-8162]
From the Federal Register Online via GPO Access [wais.access.gpo.gov]
[DOCID:fr20fe03-10]
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DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. 2002-NE-32-AD]
RIN 2120-AA64
Airworthiness Directives; NARCO Avionics Inc. AT150 Transponders
AGENCY: Federal Aviation Administration, DOT.
ACTION: Notice of proposed rulemaking (NPRM).
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SUMMARY: The Federal Aviation Administration (FAA) proposes to adopt a
new airworthiness directive (AD) that is applicable to certain serial
numbers (SN's) of NARCO Avionics Inc. AT150 transponders. This proposal
would require modification to the transponder by adding a resistor and
transistor to the circuit board. This proposal is prompted by reports
of AT150 transponders not recognizing and responding properly to Mode S
interrogations from Mode S ground stations and Traffic Alert and
Collision Avoidance System (TCAS-II) airborne equipment. The actions
specified by the proposed AD are intended to prevent loss of aircraft
airspace separation and the possibility of mid-air collision.
DATES: Comments must be received by April 21, 2003.
ADDRESSES: Submit comments in triplicate to the Federal Aviation
Administration (FAA), New England Region, Office of the Regional
Counsel, Attention: Rules Docket No. 2002-NE-32-AD, 12 New England
Executive Park, Burlington, MA 01803-5299. Comments may be inspected at
this location, by appointment, between 8 a.m. and 4:30 p.m., Monday
through Friday, except Federal holidays. Comments may also be sent via
the Internet using the following address: ``9-ane-adcomment@faa.gov''.
Comments sent via the Internet must contain the docket number in the
subject line.
The service information referenced in the proposed rule may be
obtained from NARCO Avionics Inc., 270 Commerce Drive, Fort Washington,
PA 19034; telephone (215) 643-2905; fax (215) 643-2007. This
information may be examined, by appointment, at the FAA, New England
Region, Office of the Regional Counsel, 12 New England Executive Park,
Burlington, MA.
FOR FURTHER INFORMATION CONTACT: Balram Rambrich, Aerospace Engineer,
New York Aircraft Certification Office, FAA, Engine and Propeller
Directorate, 10 Fifth Street, 3rd floor, Valley Stream, NY 11581-1200;
telephone (516) 256-7507; fax (516) 256-2716.
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 should 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.
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 2002-NE-32-AD.'' The postcard will be date stamped and
returned to the commenter.
Availability of NPRM's
Any person may obtain a copy of this NPRM by submitting a request
to the FAA, New England Region, Office of the Regional Counsel,
Attention: Rules Docket No. 2002-NE-32-AD, 12 New England Executive
Park, Burlington, MA 01803-5299.
Discussion
On March 20, 2002, the FAA was made aware of twelve AT150
transponders that failed to recognize and respond to Mode S
interrogations from Mode S ground stations and TCAS-II airborne
equipment during random testing performed by FAA Flight Standards
safety inspectors. Subsequently, the manufacturer determined that
``Chassis Level A'' AT150 transponders have a design error, which
causes the P4 pulse not to be presented, causing the transponders to
shut down. This condition, if not corrected, could result in loss of
aircraft airspace separation, and the possibility of mid-air collision.
This proposal is only applicable to NARCO Avionics Inc. AT150
transponders with ``Chassis Level A'', serial numbers 10000 through
12598 inclusive.
Manufacturer's Service Information
The FAA has reviewed and approved the technical contents of NARCO
Avionics Inc. service bulletin (SB) AT150 No. 6, dated January 31,
2003, that describes procedures for modification of the affected
transponders, by adding a resistor and transistor to the circuit board
to allow proper operation and changing them to ``Chassis Level B''. The
SB also describes procedures for transponder testing after the
modification is complete.
FAA's Determination of an Unsafe Condition and Proposed Actions
Since an unsafe condition has been identified that is likely to
exist or develop on other NARCO Avionics Inc. AT150 transponders of the
same type design, the proposed AD would require:
[sbull] For transponders not modified in accordance with NARCO
Avionics Inc. service bulletin (SB) AT150 No. 1, dated July 29, 1977,
modification of ``Chassis Level A'' transponders, serial numbers 10000
through 12598 inclusive, by adding a resistor and transistor to the
circuit board, changing transponder to ``Chassis Level B'', and
transponder testing after the modification; AND
[sbull] For transponders modified in accordance with NARCO Avionics
Inc. SB AT150 No. 1, dated July 29, 1977, changing transponder to
``Chassis Level B'', and transponder testing.
The actions would be required to be done in accordance with the
service bulletin described previously.
Economic Analysis
The FAA estimates that 2,598 NARCO Avionics Inc. ``Chassis Level
A'' AT150 transponders could be affected by this proposal if all were
installed in aircraft of U.S. registry. Approximately one work hour per
transponder will be needed to perform the proposed actions,
[[Page 8162]]
at an average labor rate of $60 per work hour. Required parts would
cost approximately $12 per transponder. Based on these figures, the
total estimated cost of the proposed AD to U.S. operators could be
$187,056.
Regulatory Analysis
This proposed rule does not have federalism implications, as
defined in Executive Order 13132, because it 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.
Accordingly, the FAA has not consulted with state authorities prior to
publication of this proposed rule.
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:
NARCO Avionics Inc. AT150 Transponders: Docket No. 2002-NE-32-
AD.
Applicability: This airworthiness directive (AD) is applicable
to NARCO Avionics Inc. AT150 transponders with ``Chassis Level A'',
serial numbers (SN's) 10000 through 12598 inclusive. These
transponders might be installed on, but not limited to the following
aircraft:
Cessna Aircraft Company
172, 182, R182, T182, 206, P206, U206, TP206, 210, T210, P210, 310,
E310, T310, and 421 series airplanes.
Twin Commander Aircraft Company
500, 520, 560, 680, 681, 685, 690, 695, and 720 series airplanes.
The New Piper Aircraft Corporation
PA-31, PA-32, and PA-34 series airplanes.
Raytheon Aircraft Company
E33, F33, G33, 35, J35, K35, L35, M35, P35, S35, V35, 36, A26, B36,
D55, E55, 56, A56, 58, 58A, 95, B95, D95, and E95 series airplanes.
Mooney Aircraft Corporation
M20 series airplanes.
McDonnell Douglas Helicopter Company
Model 500N rotorcraft.
Note 1: This AD applies to each transponder identified in the
preceding applicability provision, regardless of whether it has been
modified, altered, or repaired in the area subject to the
requirements of this AD. For transponders that have been modified,
altered, or repaired so that the performance of the requirements of
this AD is affected, the owner/operator must request approval for an
alternative method of compliance in accordance with paragraph (c) of
this AD. The request should include an assessment of the effect of
the modification, alteration, or repair on the unsafe condition
addressed by this AD; and, if the unsafe condition has not been
eliminated, the request should include specific proposed actions to
address it.
Compliance
Compliance with this AD is required as indicated, unless already
done.
To prevent loss of aircraft airspace separation, and the
possibility of mid-air collision, do the following:
Transponders Not Modified In Accordance With Service Bulletin AT150 No.
1
(a) For AT150 transponders with a SN listed in this AD that are not
modified in accordance with service bulletin (SB) AT150 No. 1, dated
July 29, 1977, within six months after the effective date of this AD,
do the following:
(1) Install resistor part number (P/N) 755610028 and transistor P/N
312180102; and
(2 ) Change transponder to ``Chassis Level B''; and
(3) Test transponders in accordance with the Corrective Action,
Testing the Modification, and Return to Service paragraphs of SB AT150
No. 6, dated January 31, 2003.
Transponders Modified In Accordance With Service Bulletin AT150 No. 1
(b) For AT150 transponders with a SN listed in this AD, that are
modified in accordance with SB AT150 No. 1, dated July 29, 1977, do the
following:
(1) Within six months after the effective date of this AD, change
transponder to ``Chassis Level B''; and
(2) Test transponders in accordance with the Testing the
Modification paragraph of SB AT150 No. 6, dated January 31, 2003; and
(3) Perform a bench test to the transponder before returning it to
service. Information on bench testing can be found in AT150 Manual P/N
03606-0600.
Alternative Methods of Compliance
(c) An alternative method of compliance or adjustment of the
compliance time that provides an acceptable level of safety may be used
if approved by the Manager, New York Aircraft Certification Office.
Operators must submit their request through an appropriate FAA
Principal Maintenance Inspector, who may add comments and then send it
to the Manager, New York Aircraft Certification Office.
Note 2: Information concerning the existence of approved
alternative methods of compliance with this airworthiness directive,
if any, may be obtained from the New York Aircraft Certification
Office.
Special Flight Permits
(d) Special flight permits may be issued in accordance with
Sec. Sec. 21.197 and 21.199 of the Federal Aviation Regulations (14
CFR 21.197 and 21.199) to operate the aircraft to a location where the
requirements of this AD can be done.
Issued in Burlington, Massachusetts, on February 12, 2003.
Francis A. Favara,
Acting Manager, Engine and Propeller Directorate, Aircraft
Certification Service.
[FR Doc. 03-4056 Filed 2-19-03; 8:45 am]
BILLING CODE 4910-13-U