AD 90-24-01

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AD Number:
90-24-01
Document Type:
AD Final Rules
Docket Number:
89-ANE-13
Subject Heading:
TEXTRON LYCOMING Models ALF502R Series Engines
Subject:
High Compressor Disks
Status:
Current
Citation:
This information is not available.
Citation Publish Date:
Effective Date:
11/13/1990
Make:
Honeywell International Inc.
Model:
ALF502R-3 | ALF502R-3A | ALF502R-4 | ALF502R-5 | ALF502R-6
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Superseded AD: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Superseded By: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:
Updated RGL applicability to match AD applicability; CAR C-11-185
AIRWORTHINESS DIRECTIVES FINAL RULES: 90-24-01
CITATION:   This information is not available.

PAGE NUMBER:  

DOCKET NUMBER:   89-ANE-13

AMENDMENT:   39-6760

AD NUMBER:   90-24-01

SUBJECT HEADING:   TEXTRON LYCOMING Models ALF502R Series Engines

ACTION:  

SUMMARY:  

DATES:   Effective November 13, 1990.

ADDRESSES:  

FOR FURTHER INFORMATION CONTACT:  

SUPPLEMENTARY INFORMATION:  

REGULATORY TEXT:   90-24-01 TEXTRON LYCOMING: Amendment 39-6760. Docket No. 89-ANE-13.
Applicability: ALF502R series turbofan engines installed on, but not limited to British Aerospace BAE146 aircraft.
Compliance: Required as indicated, unless already accomplished.
To prevent complete loss of engine power, uncontained disk failure, and possible damage to the aircraft, accomplish the following:
(a) Inspect and recoat with "Sermetel W", "ALSEAL-518" or aluminum paint, third stage high compressor (HC) disks in accordance with Textron Lycoming Service Bulletin (SB) ALF502R-72-203, Revision 2, dated August 8, 1990, as follows:
(1) For those third stage HC disks with 7,000 cycles since new (CSN) or greater on the effective date of this AD, within the next 500 cycles in service (CIS) not to exceed 8,500 CSN.
(2) For those third stage HC disks with less than 7,000 CSN on the effective date of this AD, at or prior to accumulating a total of 7,500 CSN.
(b) Reinspect third stage HC disks recoated with aluminum paint as follows:
(1) For disks inspected in accordance with Textron Lycoming SB ALF502R 72-203, Revision 2, dated August 8, 1990, at intervals not to exceed 6,000 CIS from last inspection.
(2) For disks inspected in accordance with Textron Lycoming SB ALF502R 72-218, Revision 1, dated December 1, 1989, at intervals not to exceed 1,500 CIS from last inspection. Remove the modified second stage compressor spacer, Part Number 2-100-047R10, from service prior to accumulating 5,000 additional CIS since modification, not to exceed 16,600 CSN.
(3) For disks inspected in accordance with Textron Lycoming SB ALF502R 72-237, dated November 30, 1989, at intervals not to exceed 1,000 CIS from last inspection. Remove the modified second stage compressor spacer, Part Number 2-100-047R10, from service prior to accumulating 5,000 additional CIS since modification, not to exceed 16,600 CSN.
(c) No reinspection is required for those third stage HC disks recoated with "SERMETEL W" or "ALSEAL-518" surface finish in accordance with Textron Lycoming SB ALF502R 72-203, Revision 2, dated August 8, 1990.
(d) Actions accomplished in accordance with SB ALF502R 72-203, dated January 31, 1989; SB ALF502R 72-203, Revision 1, dated June 16, 1989; or with SB ALF502R 72-218, dated May 26, 1989, in complying with Telegraphic Airworthiness Directive T89-13-52 dated June 22, 1989, are considered to be in compliance with the corresponding requirements of this AD, if applicable.
(e) 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.
(f) Upon submission of substantiating data by an owner or operator through an FAA Airworthiness Inspector, an alternate method of compliance with the requirements of this AD or adjustments to the compliance (schedule) times specified in this AD may be approved by the Manager, Engine Certification Office, Engine and Propeller Directorate, Aircraft Certification Service, Federal Aviation Administration, 12 New England Executive Park, Burlington, Massachusetts 01803.
The inspection procedures shall be done in accordance with the following Textron Lycoming Service Bulletins:

Service Bulletin No.	Page No.	Issue/Revision	Date
ALF502R 72-203	1-4, 6	2	August 8, 1990
ALF502R 72-203	5	1	June 16, 1989
ALF502R 72-218	1, 2, 3, 4, 5, 6, 9	1	December 1, 1989
ALF502R 72-218	7, 8	original	May 26, 1989
ALF502R 72-237	1-12	original	November 30, 1989

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 Textron Lycoming, 550 Main Street, Stratford, Connecticut 06497. Copies may be inspected at the Regional Rules Docket, Office of the Assistant Chief Counsel, Federal Aviation Administration, New England Region, 12 New England Executive Park, Room 311, Burlington, Massachusetts 01803, or at the Office of the Federal Register, 1100 L Street, NW, Room 8301, Washington, DC 20591.
Airworthiness Directive 90-24-01 supersedes TAD T89-13-52 dated June 22, 1989.
This amendment (39-6760, AD 90-24-01) becomes effective on November 13, 1990.

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