AD 89-10-07

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AD Number:
89-10-07
Document Type:
AD Final Rules
Docket Number:
Unknown
Subject Heading:
PRATT & WHITNEY Models JT9D-3A, -7, -7A, -7AH, -7H, -7F, -7J, and -20 Engines
Subject:
Strut Insert Assembly
Status:
Current
Citation:
This information is not available.
Citation Publish Date:
Effective Date:
05/30/1989
Make:
Pratt & Whitney Division
Model:
JT9D-20 | JT9D-3A | JT9D-7 | JT9D-7A | JT9D-7AH | JT9D-7F | JT9D-7H | JT9D-7J
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Superseded AD: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Superseded By: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: 89-10-07
CITATION:   This information is not available.

PAGE NUMBER:  

DOCKET NUMBER:   Unknown

AMENDMENT:   39-6181

AD NUMBER:   89-10-07

SUBJECT HEADING:   PRATT & WHITNEY Models JT9D-3A, -7, -7A, -7AH, -7H, -7F, -7J, and -20 Engines

ACTION:  

SUMMARY:  

DATES:   Effective May 30, 1989.

ADDRESSES:  

FOR FURTHER INFORMATION CONTACT:  

SUPPLEMENTARY INFORMATION:  

REGULATORY TEXT:  
89-10-07 PRATT & WHITNEY: Amendment 39-6181.

Applicability: Pratt & Whitney (PW) JT9D-3A, -7, -7A, -7AH, -7H, -7F, -7J, and -20 turbofan engines.

Compliance: Required as indicated, unless already accomplished.

To prevent a diffuser case Number 4 or Number 7 strut failure that can cause a Number 3 bearing compartment fire and subsequent nacelle fire, accomplish the following:

(a) Install strut insert assembly Part Number 804698-01 into both the Number 4 and Number 7 diffuser case struts, in accordance with the Accomplishment Instructions of PW Service Bulletin (SB) 5730, dated February 4, 1987, at the next engine shop visit after the effective date of this AD, but not later than August 31, 1991.

NOTE: For the purpose of this AD, engine shop visit is defined as maintenance entailing a separation of the high pressure compressor case and diffuser case "K" flange.

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

(c) Upon submission of substantiating data by an owner or operator through an FAA Airworthiness Inspector, an alternative method of compliance with the requirements of this AD or adjustment to the compliance times specified in this AD may be approved by the Manager, Engine Certification Office, ANE-140, Engine and Propeller Directorate, Aircraft Certification Service, Federal Aviation Administration, 12 New England Executive Park, Burlington, Massachusetts 01803.

The diffuser case strut insert incorporation shall be done in accordance with PW SB 5730, dated February 4, 1987. 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 Pratt & Whitney, Publication Department, P.O. Box 611, Middletown, Connecticut 06457. 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, N.W., Room 8301, Washington, DC.

This amendment (39-6181, AD 89-10-07) becomes effective on May 30, 1989.

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