AD 87-15-03

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AD Number:
87-15-03
Document Type:
AD Final Rules
Docket Number:
Unknown
Subject Heading:
TEXTRON LYCOMING Model ALF502R and ALF502L Series Engines
Subject:
Gas Producer Turbine Spacer
Status:
Current
Citation:
This information is not available.
Citation Publish Date:
Effective Date:
07/24/1987
Make:
Honeywell International Inc.
Model:
ALF502L | ALF502L-2 | ALF502L-2A | ALF502L-2C | ALF502L-3 | ALF502R-3 | ALF502R-3A | ALF502R-4 | ALF...Show more
Product Type:
Engine
Product Subtype:
Affected AD:
Superseded AD:
Affected By:
Superseded By:
Service/Office:
Office of Primary Responsibility:
CFR Part Reference:
Part 39
Comments:
AIRWORTHINESS DIRECTIVES FINAL RULES: 87-15-03
CITATION:   This information is not available.

PAGE NUMBER:  

DOCKET NUMBER:   Unknown

AMENDMENT:   39-5660

AD NUMBER:   87-15-03

SUBJECT HEADING:   TEXTRON LYCOMING Model ALF502R and ALF502L Series Engines

ACTION:  

SUMMARY:  

DATES:   Effective July 24, 1987.

ADDRESSES:  

FOR FURTHER INFORMATION CONTACT:  

SUPPLEMENTARY INFORMATION:  

REGULATORY TEXT:  
87-15-03 AVCO LYCOMING TEXTRON: Amendment 39-5660. Applies to Avco Lycoming Textron ALF502R and ALF502L series turbofan engines.

Compliance is required as indicated, unless already accomplished.

To prevent failure of the gas producer turbine (GPT) spacer which can result in loss of engine power, accomplish the following:

(a) Remove from service GPT spacer, Part Number (P/N) 2-121-071-28, 2-121-071-30, 2-121-071-20, or 2-121-071-24 in accordance with Avco Lycoming Textron Service Bulletin (SB) Number ALF502R-72-0163 or ALF502L-72-0163, dated June 8, 1987, as follows:

(1) Prior to accumulating 1,000 cycles in service after the effective date of this AD, spacers with 6,000 cycles since new (CSN) or greater on the effective date of this AD.

(2) Prior to accumulating 7,000 CSN, spacers with 5,000 CSN or greater and less than 6,000 CSN on the effective date of this AD.

(3) Prior to accumulating 6,000 CSN, spacers with 4,000 CSN or greater and less than 5,000 CSN on the effective date of this AD.

(4) Prior to accumulating 5,000 CSN, spacers with 3,000 CSN or greater and less than 4,000 CSN on the effective date of this AD.

(5) Prior to accumulating 4,400 CSN, spacers with 2,100 cycles or greater and less than 3,000 CSN on the effective date of this AD.

(6) Prior to accumulating 3,500 CSN, spacers with less than 2,100 CSN on the effective date of this AD.

(b) Prior to engine reassembly, inspect GPT spacers which were removed from service to comply with paragraph (a) above in accordance with Avco Lycoming Textron SB ALF502R-72-0163 or ALF502L-72-0163, dated June 8, 1987. For disk assemblies with a GPT spacer cracked through radially from the inside diameter to the rim, remove from service, prior to further flight, the first and second stage turbine disks, the sealing plate, and the cracked spacer.

NOTE: Avco Lycoming Textron SB's ALF502R-72-002, Revision 16, and ALF502L-72-0004, Revision 16, revised April 3, 1987, added GPT spacer P/N's 2-121-071-31 and 2-121-071-35, respectively, and decreased the cyclic life of all gas producer turbine spacers from 16,600 cycles to 3,500 cycles.

Aircraft may be ferried in accordance with the provisions of FAR 21.197 and 21.199 to a base where the AD can be accomplished.

Upon request, an equivalent means of compliance with the requirements of this AD may be approved by the Manager, Engine Certification Office, Aircraft Certification Division, Federal Aviation Administration, New England Region, 12 New England Executive Park, Burlington, Massachusetts 01803.

Upon submission of substantiating data by an owner or operator through an FAA maintenance inspector, the Manager, Engine Certification Office, New England Region, may adjust the compliance times specified in this AD.

Avco Lycoming Textron SB's ALF502R-72-0163, dated June 8, 1987, and ALF502L-72-0163, dated June 8, 1987, identified and described in this document, are incorporated herein and made a part hereof pursuant to 5 U.S.C. 552(a)(1). All persons affected by this directive who have not already received these documents from the manufacturer may obtain copies upon request to Avco Lycoming Textron, 550 South Main Street, Stratford, Connecticut 06497.

These documents also may be examined at the Office of the Regional Counsel, Federal Aviation Administration, New England Region, 12 New England Executive Park, Burlington, Massachusetts 01803, Room 311, Rules Docket Number 87-ANE-12, between the hours of 8:00 a.m. and 4:30 p.m., Monday through Friday, except federal holidays.

This amendment, 39-5660, becomes effective on July 24, 1987.

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