[Federal Register Volume 62, Number 201 (Friday, October 17, 1997)]
[Rules and Regulations]
[Pages 53935-53937]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 97-27350]
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DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. 97-ANE-38-AD; Amendment 39-10160; AD 97-21-07]
RIN 2120-AA64
Airworthiness Directives; AlliedSignal Inc. (Formerly Textron
Lycoming) Model T5313B, T5317A, and T53 (Military) Turboshaft Engines
AGENCY: Federal Aviation Administration, DOT.
ACTION: Final rule; request for comments.
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SUMMARY: This amendment adopts a new airworthiness directive (AD) that
is applicable to AlliedSignal Inc. (formerly Textron Lycoming) Model
T5313B, T5317A, and T53 series military turboshaft engines approved for
installation on aircraft certified in accordance with Section 21.25 of
the Federal Aviation Regulations (FAR). This action requires a one-time
visual inspection of accessory drive carrier assemblies for affected
serial numbers (S/Ns) designating a defective assembly, and if the S/N
is applicable, replacement with a serviceable assembly. This amendment
is prompted by a report of an N2 overspeed condition due to a defective
accessory drive carrier assembly. The actions specified in this AD are
intended to prevent accessory drive carrier assembly failure, which
could result in an N2 overspeed and an uncontained engine failure.
DATES: Effective November 3, 1997.
The incorporation by reference of certain publications listed in
the regulations is approved by the Director of the Federal Register as
of November 3, 1997.
Comments for inclusion in the Rules Docket must be received on or
before December 16, 1997.
ADDRESSES: Submit comments in triplicate to the Federal Aviation
Administration (FAA), New England Region, Office of the Assistant Chief
Counsel, Attention: Rules Docket No. 97-ANE-38-AD, 12 New England
Executive Park, Burlington, MA 01803-5299. Comments may also be sent
via the Internet using the following address: ``engineprop@faa.dot.gov''. Comments sent via the Internet must contain
the docket number in the subject line.
The service information referenced in this AD may be obtained from
AlliedSignal Aerospace, Attn: Data Distribution, M/S 64-3/2101-201,
P.O. Box 29003, Phoenix, AZ 85038-9003; telephone (602) 365-2493, fax
(602) 365-5577. This information may be examined at the FAA, New
England Region, Office of the Assistant Chief Counsel, 12 New England
Executive Park, Burlington, MA; or at the Office of the Federal
Register, 800 North Capitol Street, NW., suite 700, Washington, DC.
FOR FURTHER INFORMATION CONTACT: Ray Vakili, Aerospace Engineer, Los
Angeles Aircraft Certification Office, FAA, Transport Airplane
Directorate, 3960 Paramount Blvd., Lakewood, CA 90712-4137; telephone
(562) 627-5262, fax (562) 627-5210.
SUPPLEMENTARY INFORMATION: The Federal Aviation Administration has
received a report of an N2 overspeed condition on an AlliedSignal Inc.
(formerly Textron Lycoming) Model T5317A-1 turboshaft engine. The
investigation revealed that the N2 overspeed condition was caused when
the N2 overspeed governor bevel gear, which is part of the accessory
drive carrier and cap assembly, shifted out of position. This gear
shifting out of position was determined to be due to improper
manufacturing of the accessory drive carrier and cap assembly, Part
Number (P/N) 1-070-210-01, which is installed on the higher level
assembly, accessory drive carrier assembly, P/N 1-070-220-03, 1-070-
220-12, or 1-070-220-13. All accessory drive carrier assemblies, P/Ns
1-070-220-03, 1-070-220-12, and 1-070-220-13, installed after November
1, 1985, and have been identified by serial number (S/N) are subject to
this inspection. This condition, if not corrected, could result in
accessory drive carrier assembly failure, which could result in an N2
overspeed and an uncontained engine failure.
The FAA has reviewed and approved the technical contents of
AlliedSignal Inc. Alert Service Bulletin (ASB) No. T5313B/17A-A0092,
Revision 1, dated July 1, 1997; ASB No. T53-L-13B-A0092, dated June 4,
1997; and ASB No. T53-L-703-A0092, dated June 4, 1997. These ASBs
describe procedures for performing a one-time visual inspection of
accessory drive carrier assemblies for affected S/Ns designating a
defective assembly, and if the S/N is applicable, replacement with a
serviceable assembly.
Since an unsafe condition has been identified that is likely to
exist or develop on other engines of the same type design, this AD is
being issued to prevent accessory drive carrier assembly failure. This
AD requires a one-time visual inspection of accessory drive carrier
assemblies for affected S/Ns designating a potentially defective
assembly, and if the S/N is applicable, replacement with a serviceable
assembly. The actions are required to be accomplished in accordance
with the ASBs described previously.
Since a situation exists that requires the immediate adoption of
this regulation, it is found that notice and opportunity for prior
public comment hereon are impracticable, and that good cause exists for
making this amendment effective in less than 30 days.
Comments Invited
Although this action is in the form of a final rule that involves
requirements affecting flight safety and, thus, was not preceded by
notice and an opportunity
[[Page 53936]]
for public comment, comments are invited on this rule. Interested
persons are invited to comment on this 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 under the caption ADDRESSES. All communications
received on or before the closing date for comments will be considered,
and this rule may be amended in light of the comments received. Factual
information that supports the commenter's ideas and suggestions is
extremely helpful in evaluating the effectiveness of the AD action and
determining whether additional rulemaking action would be needed.
Comments are specifically invited on the overall regulatory,
economic, environmental, and energy aspects of the rule that might
suggest a need to modify the 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 that
summarizes each FAA-public contact concerned with the substance of this
AD will be filed in the rules docket.
Commenters wishing the FAA to acknowledge receipt of their comments
submitted in response to this notice must submit a self-addressed,
stamped postcard on which the following statement is made: ``Comments
to Docket Number 97-ANE-38-AD.'' The postcard will be date stamped and
returned to the commenter.
The regulations adopted herein will not have substantial direct
effects 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, in
accordance with Executive Order 12612, it is determined that this final
rule does not have sufficient federalism implications to warrant the
preparation of a Federalism Assessment.
The FAA has determined that this regulation is an emergency
regulation that must be issued immediately to correct an unsafe
condition in aircraft, and is not a ``significant regulatory action''
under Executive Order 12866. It has been determined further that this
action involves an emergency regulation under DOT Regulatory Policies
and Procedures (44 FR 11034, February 26, 1979). If it is determined
that this emergency regulation otherwise would be significant under DOT
Regulatory Policies and Procedures, a final regulatory evaluation will
be prepared and placed in the rules docket. A copy of it, if filed, may
be obtained from the rules docket at the location provided under the
caption ADDRESSES.
List of Subjects in 14 CFR Part 39
Air transportation, Aircraft, Aviation safety, Incorporation by
reference, Safety.
Adoption of the Amendment
Accordingly, pursuant to the authority delegated to me by the
Administrator, the Federal Aviation Administration amends 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:
97-21-07 AlliedSignal Inc.: Amendment 39-10160. Docket 97-ANE-38-
AD.
Applicability: AlliedSignal Inc. (formerly Textron Lycoming)
Model T5313B, T5317A, and T53 series military turboshaft engines
approved for installation on aircraft certified in accordance with
Section 21.25 of the Federal Aviation Regulations (FAR), with
accessory drive carrier assemblies, Part Numbers (P/Ns) 1-070-220-
03, 1-070-220-12, and 1-070-220-13, that were installed after
November 1, 1985, and have serial numbers (S/Ns) listed in
AlliedSignal Inc. Alert Service Bulletins (ASBs) No. T5313B/17A-
A0092, Revision 1, dated July 1, 1997; ASB No. T53-L-13B-A0092,
dated June 4, 1997; or ASB No. T53-L-703-A0092, dated June 4, 1997.
These engines are installed on but not limited to Bell Helicopter
Textron Model 205A-1 and 205B series helicopters, Kaman Aircraft
Corporation K-1200 series helicopters, and military helicopters
certified in accordance with Section 21.25 of the FAR.
Note 1: A shipping records, engine logbooks, work orders, and
parts invoices check may allow an owner or operator to determine if
this AD applies.
Note 2: This airworthiness directive (AD) applies to each engine
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 engines 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 (b) 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: Required as indicated, unless accomplished
previously.
To prevent accessory drive carrier assembly failure, which could
result in an N2 overspeed and an uncontained engine failure,
accomplish the following:
(a) Within 100 hours time in service (TIS), or 6 months after
the effective date of this AD, whichever occurs first, accomplish
the following in accordance with AlliedSignal Inc. ASB No. T5313B/
17A-A0092, Revision 1, dated July 1, 1997; ASB No. T53-L-13B-A0092,
dated June 4, 1997; and ASB No. T53-L-703-A0092, dated June 4, 1997,
as applicable:
(1) Visually inspect to determine if the accessory drive carrier
assembly is marked with an affected S/N listed in the applicable
ASBs.
(2) If the accessory drive carrier assembly is not marked with
an affected S/N listed in the applicable ASB, no further action is
required.
(3) If the accessory drive carrier assembly is marked with an
affected S/N listed in the applicable ASB, or the serial number
cannot be positively determined, remove the accessory drive carrier
assembly from service and replace with a serviceable assembly.
(b) 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, Los Angeles Aircraft Certification
Office. Operators shall submit their requests through an appropriate
FAA Principal Maintenance Inspector, who may add comments and then
send it to the Manager, Los Angeles Aircraft Certification Office.
Note 3: Information concerning the existence of approved
alternative methods of compliance with this airworthiness directive,
if any, may be obtained from the Los Angeles Aircraft Certification
Office.
(c) Special flight permits may be issued in accordance with
sections 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 accomplished.
(d) The actions required by this AD shall be done in accordance
with the following AlliedSignal Inc. ASBs:
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Document No. Pages Revision Date
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T5313B/17A-A0092......................... 1-7 1......................... July 1, 1997.
Total pages: 7
T53-L-13B-A0092.......................... 1-7 Original.................. June 4, 1997.
Total pages: 7
[[Page 53937]]
T53-L-703-A0092.......................... 1-7 Original.................. June 4, 1997.
Total pages: 7
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This incorporation by reference was approved by the Director of
the Federal Register in accordance with 5 U.S.C. 552(a) and 1 CFR
part 51. Copies may be obtained from AlliedSignal Aerospace, Attn:
Data Distribution, M/S 64-3/2101-201, P.O. Box 29003, Phoenix, AZ
85038-9003; telephone (602) 365-2493, fax (602) 365-5577. Copies may
be inspected at the FAA, New England Region, Office of the Assistant
Chief Counsel, 12 New England Executive Park, Burlington, MA; or at
the Office of the Federal Register, 800 North Capitol Street, NW.,
suite 700, Washington, DC.
(e) This amendment becomes effective on November 3, 1997.
Issued in Burlington, Massachusetts, on October 8, 1997.
Jay J. Pardee,
Manager, Engine and Propeller Directorate, Aircraft Certification
Service.
[FR Doc. 97-27350 Filed 10-16-97; 8:45 am]
BILLING CODE 4910-13-U
