AD 82-25-10

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AD Number:
82-25-10
Document Type:
AD Final Rules
Docket Number:
Unknown
Subject Heading:
AVCO LYCOMING Models ALF502L, L-2, R-3, and R-4 Engines
Subject:
First Stage Compressor Stator Vane Airfoils and/or Fourth Stage Turbine Blade Airfoils
Status:
Current
Citation:
This information is not available.
Citation Publish Date:
Effective Date:
12/16/1982
Make:
Honeywell International Inc.
Model:
ALF502L | ALF502L-2 | ALF502L-2A | ALF502L-2C | ALF502R-3 | ALF502R-3A | ALF502R-4
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Superseded AD: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Superseded By: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: 82-25-10
CITATION:   This information is not available.

PAGE NUMBER:  

DOCKET NUMBER:   Unknown

AMENDMENT:   39-4511

AD NUMBER:   82-25-10

SUBJECT HEADING:   AVCO LYCOMING Models ALF502L, L-2, R-3, and R-4 Engines

ACTION:  

SUMMARY:  

DATES:   Effective December 16, 1982.

ADDRESSES:  

FOR FURTHER INFORMATION CONTACT:  

SUPPLEMENTARY INFORMATION:  

REGULATORY TEXT:  
82-25-10 AVCO LYCOMING: Amendment 39-4511. Applies to Avco Lycoming ALF502L, L-2, R-3, and R-4 Turbofan Engines.

Compliance is required as indicated unless already accomplished.

To prevent engine power loss, uncontained engine failure, and in-flight engine shutdown, caused by separation of first stage compressor stator vane airfoils and/or separation of fourth stage turbine blade airfoils, one of which was not contained, accomplish the following:

(a) Prior to December 16, 1982, and thereafter at intervals not to exceed 50 operating cycles since the last inspection, perform boroscope inspections of first stator vane segments in accordance with Avco Lycoming Service Bulletin ALF502-72-0012, Revision 2, dated June 17, 1982, until paragraph (b) is accomplished.

(b) Prior to July 1, 1983, replace first stage compressor stator vane assembly with the improved first stage compressor stator vane assembly in accordance with Avco Lycoming Service Bulletin ALF502-72-0025, Revision 1, dated June 17, 1982.

(c) Prior to December 16, 1982, conduct eddy current inspections of fourth stage turbine blades in accordance with Avco Lycoming Service Bulletin ALF502-72-0027 dated May 26, 1982.

(d) Prior to July 1, 1983, replace fourth stage turbine nozzle with the improved fourth stage turbine nozzle in accordance with Avco Lycoming Service Bulletin ALF502-72-0021, dated April 16, 1982.

(e) Later FAA approved revisions of the service bulletins, referred to in this AD, and/or equivalent means approved by the Manager, Engine Certification Branch, FAA, New England Region, may be used in lieu of the above listed service bulletins.

(f) Upon request of the operator, an FAA maintenance inspector, subject to prior approval of the Manager, Engine Certification Branch, FAA, New England Region, may adjust the compliance date specified in this AD to permit compliance at an established inspection period of the operator if the request contains substantiating data to justify the increase for that operator.

This amendment becomes effective December 16, 1982.

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