AD Amdt-39-11180

Recurring final rule
Data completeness: 70%

Airworthiness Directives; Pratt & Whitney JT9D Series Turbofan Engines

AD Number
Amdt-39-11180
Status
final_rule
Effective Date
Product Category
engine
Docket
Docket No. 94-ANE-54 AD
FR Citation
64 FR 28357

Applicability

TypeManufacturerModelDetails
engine Pratt & Whitney JT9D Series Airworthiness Directives; Pratt & Whitney JT9D Series Turbofan Engines

Unsafe Condition

Diffuser case ruptures leading to uncontained engine failure and potential damage to the aircraft.

AI-generated summary from the source AD text. Verify against the official source before acting.

Required Actions

Reduce the allowable crack length in the diffuser case rear rail. Decrease inspection intervals for diffuser case rear rail cracking. Implement an improved inspection method for the diffuser case rear rail.

AI-generated summary from the source AD text. Verify against the official source before acting.

Compliance Time

Before further flight

AI-generated summary from the source AD text. Verify against the official source before acting.

Affected Aircraft

Pratt & Whitney JT9D series turbofan engines.

AI-generated summary from the source AD text. Verify against the official source before acting.

Source: Official FAA Source ↗

Retrieved: Apr 6, 2026

Rights: U.S. Government Public Domain

This site is not affiliated with or endorsed by the FAA. Always verify with official sources.

View Official Source ↗ Find More ADs for Pratt & Whitney JT9D Series

Related Airworthiness Directives

2012-14-02

final rule

Airworthiness Directives; The Boeing Company Airplanes

Unsafe Condition: which could fail to prevent a deployment of a deactivated thrust reverser in flight and consequent reduced controllability of the airplane.

Effective: Aug 21, 2012 Category: aircraft

2007-05-17

final rule

Airworthiness Directives; Pratt & Whitney JT9D Series Turbofan Engines

Unsafe Condition: could result in an uncontained engine failure and damage to the airplane.

Effective: Apr 12, 2007 Category: engine

2002-19-11

final rule

Airworthiness Directives; Boeing Model 767-200 and -300 Series Airplanes Powered by Pratt & Whitney JT9D Series Engines

Unsafe Condition: unsafe condition.

Effective: Nov 5, 2002 Category: aircraft

2002-08-11

final rule

Airworthiness Directives; Pratt & Whitney JT9D Series Turbofan Engines

Unsafe Condition: could result in an uncontained engine failure and damage to the airplane.

Effective: May 28, 2002 Category: engine

View all Pratt & Whitney ADs →