[Federal Register Volume 61, Number 119 (Wednesday, June 19, 1996)]
[Rules and Regulations]
[Pages 31007-31009]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 96-15383]
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DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. 93-ANE-64; Amendment 39-9668; AD 96-12-27]
RIN 2120-AA64
Airworthiness Directives; AlliedSignal Inc. (formerly Textron
Lycoming) LTS 101 Series Turboshaft and LTP 101 Series Turboprop
Engines
AGENCY: Federal Aviation Administration, DOT.
ACTION: Final rule.
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SUMMARY: This amendment adopts a new airworthiness directive (AD),
applicable to AlliedSignal Inc. (formerly Textron Lycoming) LTS 101
series turboshaft and LTP 101 series turboprop engines, that requires
removal from service of suspect disks for a one-time inspection of the
disk tenon area of the gas generator turbine disk. This amendment is
prompted by a report of a gas generator turbine disk tenon failure. The
actions specified by this AD are intended to prevent total loss of
engine power, inflight engine shutdown, and possible damage to the
aircraft.
DATES: Effective August 19, 1996.
[[Page 31008]]
The incorporation by reference of certain publications listed in
the regulations is approved by the Director of the Federal Register as
of August 19, 1996.
ADDRESSES: The service information referenced in this AD may be
obtained from AlliedSignal Engines, 111 South 34th Street, Phoenix, AZ
85072; telephone (602) 365-2493, fax (602) 365-2210. This information
may be examined at the Federal Aviation Administration (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: Eugene Triozzi, Aerospace Engineer,
Engine Certification Office, FAA, Engine and Propeller Directorate, 12
New England Executive Park, Burlington, MA 01803-5299; telephone (617)
238-7148, fax (617) 238-7199.
SUPPLEMENTARY INFORMATION: A proposal to amend part 39 of the Federal
Aviation Regulations (14 CFR part 39) to include an airworthiness
directive (AD) that is applicable to AlliedSignal Inc. (formerly
Textron Lycoming) LTS 101 series turboshaft and LTP 101 series
turboprop engines was published in the Federal Register on May 15, 1995
(60 FR 25869). That action proposed to require a one-time inspection of
the disk tenon area of the gas generator turbine disk in accordance
with Textron Lycoming Service Bulletin (SB) No. LT 101-72-50-0150,
dated September 1, 1993.
Interested persons have been afforded an opportunity to participate
in the making of this amendment. No comments were received on the
proposal or the FAA's determination of the cost to the public. The FAA
has determined that air safety and the public interest require the
adoption of the rule as proposed.
The FAA estimates that 618 engines installed on aircraft of U.S.
registry will be affected by this AD, that it will take approximately
6.5 work hours per engine to accomplish the required actions, and that
the average labor rate is $60 per work hour. AlliedSignal Inc. has
advised that they will supply disks or rotors on an exchange basis at
no cost to the operator. Based on these figures, the total cost impact
of the AD on U.S. operators is estimated to be $229,896.
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.
For the reasons discussed above, I certify that this action (1) is
not a ``significant regulatory action'' under Executive Order 12866;
(2) is not a ``significant rule'' under 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. A final evaluation has been prepared for this action
and it is contained in the Rules Docket. A copy of it 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:
96-12-27 AlliedSignal Inc.: Amendment 39-9668. Docket 93-ANE-64.
Applicability: AlliedSignal Inc. (formerly Textron Lycoming) LTS
101 series turboshaft and LTP 101 series turboprop engines installed
on but not limited to Aerospatiale AS 350 and SA366G, Bell 222, and
Messerschmitt-Bolkow-Blohm (MBB) BK117 helicopters; and Piaggio
P166-DL3 and Airtractor AT302 airplanes.
Note: 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 use the
authority provided in paragraph (b) to request approval from the
Federal Aviation Administration (FAA). This approval may address
either no action, if the current configuration eliminates the unsafe
condition, or different actions necessary to address the unsafe
condition described in this AD. Such a request should include an
assessment of the effect of the changed configuration on the unsafe
condition addressed by this AD. In no case does the presence of any
modification, alteration, or repair remove any engine from the
applicability of this AD.
Compliance: Required as indicated, unless accomplished
previously.
To prevent total loss of engine power, inflight engine shutdown,
and possible damage to the aircraft, accomplish the following:
(a) Remove from service suspect disks and perform a one-time
inspection of the disk tenon area of the gas generator turbine disk,
and replace, if necessary, with a serviceable part, in accordance
with Textron Lycoming Service Bulletin (SB) No. LT 101-72-50-0150,
dated September 1, 1993, as follows:
(1) For disks with greater than 5,000 cycles since new (CSN) on
the effective date of this AD, remove within 235 cycles in service
(CIS).
(2) For disks with 4,501 to 5,000 CSN on the effective date of
this AD, remove within 285 CIS.
(3) For disks with 4,001 to 4,500 CSN on the effective date of
this AD, remove within 350 CIS.
(4) For disks with 3,501 to 4,000 CSN on the effective date of
this AD, remove within 450 CIS.
(5) For disks with 3,001 to 3,500 CSN on the effective date of
this AD, remove within 600 CIS.
(6) For disks with 2,501 to 3,000 CSN on the effective date of
this AD, remove within 800 CIS, or prior to accumulating 3,400 CSN,
whichever occurs later.
(7) For disks with 2,001 to 2,500 CSN on the effective date of
this AD, remove within 1,100 CIS, or prior to accumulating 3,400
CSN, whichever occurs later.
(8) For disks with less than 2,000 CSN on the effective date of
this AD, remove prior to accumulating 3,400 CSN.
(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, Engine Certification Office. The
request should be forwarded through an appropriate FAA Principal
Maintenance Inspector, who may add comments and then send it to the
Manager, Engine Certification Office.
Note: Information concerning the existence of approved
alternative methods of compliance with this airworthiness directive,
if any, may be obtained from the Engine 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 SB:
[[Page 31009]]
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Document
No. Pages revision Date
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Textron Lycoming, SB No. LT 101-72-50- 1-6 Original................. September 1, 1993.
0150.
Total Pages: 6.
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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 Engines, 111 South 34th
Street, Phoenix, AZ 85072; telephone (602) 365-2493, fax (602) 365-
2210. 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 August 19, 1996.
Issued in Burlington, Massachusetts, on June 3, 1996.
James C. Jones,
Acting Manager, Engine and Propeller Directorate, Aircraft
Certification Service.
[FR Doc. 96-15383 Filed 6-18-96; 8:45 am]
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