# AD 89-25-11: Fan Blade Retaining Plates - Type: Airworthiness directive - Status: Current - Products: Pratt & Whitney Division JT8D-11, JT8D-15, JT8D-15A, JT8D-17, JT8D-17A, JT8D-17AR, JT8D-17R, JT8D-9 and JT8D-9A - Effective: January 15, 1990 - Superseded by: Nothing supersedes this AD - Product type: Engine - Amendment: 39-6352 - Registered aircraft: 118 may be affected, by airframe or engine model (OpenAirDocs) - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/87F7FE90EDDF4D3D8625685F0074BAF6.0001 - DRS record last changed: May 30, 2024 - Page: https://openairdocs.org/ad/89-25-11 ## The airworthiness directive 89-25-11 PRATT & WHITNEY: Amendment 39-6352. Applicability: Pratt & Whitney (PW) JT8D-9, -9A, -11, -15, -15A, -17, -17A, -17R, and -17AR turbofan engines. Compliance: Required as indicated, unless already accomplished. To prevent fire, inflight shutdown, engine cowl release, or airframe damage associated with a first stage fan blade liberation, remove certain first stage fan blade retaining plates in accordance with the Accomplishment Instructions of PW Alert Service Bulletin (ASB) 5841, dated February 15, 1989, and replace with an improved design retaining plate as follows: (a) Replace retaining plate Part Numbers (P/N) 520451, 616645, or 639616 with retaining plate P/N 803996 at the next shop visit but no later than: (1) Two years or 4,000 hours in service after the effective date of this AD, whichever occurs later, for wing-mounted engines. (2) Four years or 8,000 hours in service after the effective date of this AD, whichever occurs later, forfuselage-mounted engines. (b) Replace retaining plate P/N 760297, 793935, or 802710 with retaining plate P/N 803996 at the next shop visit but no later than five years or 10,000 hours in service after the effective date of this AD, whichever occurs later. NOTES: (1) A shop visit occurs following engine removal where the subsequent engine maintenance entails the following: (a) Separation of a major engine flange (lettered or numbered), other than flanges mating with major sections of the nacelle or reverser. Separation of flanges purely for purposes of shipment, without subsequent internal maintenance, is not a "shop visit." (b) Removal of a disk, hub, or spool. (2) FAA approved first stage fan blade retaining plate designs may be used in lieu of P/N 803996 retaining plate as an alternate method of compliance. (c) 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. (d)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 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 inspection/replacement procedures shall be done in accordance with PW ASB 5841, dated February 15, 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 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 (39-6352, AD 89-25-11) becomes effective on January 15, 1990. ## Affected data sheets (1) (OpenAirDocs) The type certificate data sheets whose models the AD names. - [TCDS E2EA](https://openairdocs.org/tcds/E2EA): Pratt & Whitney; names 9 of 16 models: JT8D-17AR, JT8D-17R, JT8D-15A, JT8D-15, JT8D-17, JT8D-17A, JT8D-11, JT8D-9… ## Registered aircraft it may apply to (OpenAirDocs) Matched by airframe and engine model; the AD's applicability may narrow it by serial number, part number or equipment. - Aircraft: 118 (0 by airframe model, 118 by engine model) - Makers: Mcdonnell Douglas 82, Boeing 33, Douglas 2, Beech 1 Models with the most aircraft: - [Pratt & Whitney JT8D series](https://openairdocs.org/engine/pratt-whitney-jt8d-series): 82 aircraft (engine model) - [Pratt & Whitney JT8D-9 series](https://openairdocs.org/engine/pratt-whitney-jt8d-9-series): 9 aircraft (engine model) - [Pratt & Whitney JT8D-17 series](https://openairdocs.org/engine/pratt-whitney-jt8d-17-series): 7 aircraft (engine model) - [Pratt & Whitney JT8D-17](https://openairdocs.org/engine/pratt-whitney-jt8d-17): 6 aircraft (engine model) - [Pratt & Whitney JT8D-15](https://openairdocs.org/engine/pratt-whitney-jt8d-15): 6 aircraft (engine model) - [Pratt & Whitney JT8D-9A](https://openairdocs.org/engine/pratt-whitney-jt8d-9a): 5 aircraft (engine model) - [Pratt & Whitney JT8D-9](https://openairdocs.org/engine/pratt-whitney-jt8d-9): 1 aircraft (engine model) - [Pratt & Whitney JT8D-15A](https://openairdocs.org/engine/pratt-whitney-jt8d-15a): 1 aircraft (engine model) - [Pratt & Whitney JT8D-17A](https://openairdocs.org/engine/pratt-whitney-jt8d-17a): 1 aircraft (engine model) All 9 models: https://openairdocs.org/ad/89-25-11/models.md Every aircraft: https://openairdocs.org/ad/89-25-11/aircraft.md Its text cites no advisory circulars or STCs. --- OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.