AD 87-23-05 R1

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AD Number:
87-23-05 R1
Document Type:
AD Final Rules
Docket Number:
Unknown
Subject Heading:
PRATT & WHITNEY Models JT9D-7R4D, -7R4D1, -7R4E, -7R4E1, -7R4E4, -7R4G2, and -7R4H1 Series Engines
Subject:
Fan Case Assembly
Status:
Current
Citation:
This information is not available.
Citation Publish Date:
Effective Date:
03/23/1990
Make:
Pratt & Whitney Division
Model:
JT9D-7R4D | JT9D-7R4D1 | JT9D-7R4E | JT9D-7R4E1 | JT9D-7R4E4 | JT9D-7R4G2 | JT9D-7R4H1
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Superseded AD: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Superseded By: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: 87-23-05 R1
CITATION:   This information is not available.

PAGE NUMBER:  

DOCKET NUMBER:   Unknown

AMENDMENT:   39-6296

AD NUMBER:   87-23-05 R1

SUBJECT HEADING:   PRATT & WHITNEY Models JT9D-7R4D, -7R4D1, -7R4E, -7R4E1, -7R4E4, -7R4G2, and -7R4H1 Series Engines

ACTION:  

SUMMARY:  

DATES:   Effective March 23, 1990.

ADDRESSES:  

FOR FURTHER INFORMATION CONTACT:  

SUPPLEMENTARY INFORMATION:  

REGULATORY TEXT:  
87-23-05 R1 PRATT & WHITNEY: Amendment 39-5755 as revised by Amendment 39-6296.

Applicability: Pratt & Whitney (PW) JT9D-7R4D, -7R4D1, -7R4E, -7R4E1, -7R4E4, -7R4G2, and -7R4H1 series turbofan engines.

Compliance: Required as indicated, unless already accomplished.

To prevent fan blade fragment penetration of the fan case assembly, accomplish the following prior to December 31, 1990:

(a) Modify and reidentify JT9D-7R4G2 series turbofan engines in accordance with PW Service Bulletin (SB) JT9-7R4-72-311, Revision 3, dated February 19, 1988, as follows:

(1) Modify fan case assembly by installing shield, Part Number (P/N) 802094.

(2) Modify outer front fan exit case assembly (fan exit case and vane assembly), by installing ring segments, P/N 803264-01, 803265-01, and 802448.

(3) Reidentify the modified fan case assembly, outer front fan exit case assembly, and the fan exit case and vane assembly.

(b) Modify and reidentify JT9D-7R4D, -7R4D1, -7R4E, -7R4E1, -7R4E4, and -7R4H1 series turbofan engines in accordance with PW SB JT9D-7R4-72-312, Revision 5, dated March 31, 1989, as follows:

(1) Modify fan case assembly by installing shield, P/N 802095, on engines with steel fan case assemblies and shield, P/N 802096, on engines with titanium fan case assemblies.

(2) Modify outer front fan exit case assembly, or detail of fan exit case and vane assembly, and install ring segments, P/N 803261-01, 803262-01, and 802447.

(3) Reidentify the modified fan case assembly, the outer front fan exit case assembly, and the fan exit case and vane assembly.

(c) 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.

(d) An alternate method of compliance or adjustment of the compliance time which provides an equivalent level of safety, submitted through an FAA Airworthiness Inspector, may be approved by the Manager, Engine Certification Office, Engine and Propeller Directorate, Aircraft Certification Service, 12 New England Executive Park, Burlington, Massachusetts 01803.

The modification and reidentification of the fan case assembly, outer front fan exit case assembly, and the fan exit case and vane assembly shall be done in accordance with PW SB JT9D-7R4-72-311, Revision 3, dated February 19, 1988 [pages 1, 7, 9-12, 17, 21, and 24, Revision 3, dated February 19, 1988; pages 2-6, 8, 13-16, 18-20, 22, and 23, Revision 2, dated August 19, 1987]; or PW SB JT9D-7R4-72-312, Revision 5, dated March 31, 1989 [pages 1, 3, 7-18, Revision 5, dated March 31, 1989; page 2, Revision 2, dated June 26, 1987; page 4, Revision 5, dated February 9, 1987; and page 6, Original issue, dated January 19, 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, Publications 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, NW, Room 8301, Washington, DC 20591.

This amendment (39-6296, AD 87-23-05 R1) becomes effective on March 23, 1990.

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