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2026-09-02 Recurring

final rule

Airworthiness Directives; Pratt & Whitney RTX Corporation (Type Certificate Previously Held by Pratt & Whitney Division United Technologies Corporation) Engines

Unsafe Condition: Separation of the high-pressure compressor (HPC) 7th-stage integrally bladed rotor (IBR-7) due to crack indications in the HPC 15th-stage disks, front turbine hubs, high pressure turbine (HPT) 1st-...

Effective: Jun 26, 2026 Category: engine

Why matched: Airworthiness Directives; Pratt & Whitney RTX Corporation (Type Certificate Previously Held by Pratt & Whitney Division United Technologies Corporation) Engines

Technical illustration of an aircraft turbine engine assembly
Problem area Engine
View Details View AD (PDF) ↗

2023-22-02 Recurring

final rule

Airworthiness Directives; Pratt & Whitney Division Engines

Unsafe Condition: Discovery of multiple cracked outer diffuser cases (ODCs). Failure of the ODC could result in damage to the engine and airplane.

Effective: Dec 26, 2023 Category: aircraft Compliance: Within the compliance times specified in the AD.

Why matched: Airworthiness Directives; Pratt & Whitney Division Engines

View Details View AD (PDF) ↗

2023-19-02 Recurring

final rule

Airworthiness Directives; Pratt & Whitney Division Engines

Unsafe Condition: Failure of the LPC fan hub assembly, which could result in uncontained debris release, damage to the engine, and damage to the aircraft.

Effective: Nov 7, 2023 Category: aircraft Compliance: Before further flight

Why matched: Airworthiness Directives; Pratt & Whitney Division Engines

View Details View AD (PDF) ↗

2022-12-12

final rule

Airworthiness Directives; Pratt & Whitney Division Turbofan Engines

Unsafe Condition: a manufacturing quality escape due to insufficient cooling of the LPT stage 5 air seal resulting in a reduction of the life of the low-cycle fatigue (LCF) life limit

Effective: Jul 5, 2022 Category: aircraft Compliance: within the next piece-part exposure, or before the LPT stage 5 air seal accumulates 8,240 cycles ...

Why matched: Airworthiness Directives; Pratt & Whitney Division Turbofan Engines

View Details View AD (PDF) ↗

2022-07-13

final rule

Airworthiness Directives; Pratt & Whitney Division Turbofan Engines

Unsafe Condition: Corrosion of the air/oil heat exchanger leading to oil leaks and potential engine failure.

Effective: May 2, 2022 Category: engine Compliance: Within 30 days prior to the first flight after the effective date of this AD

Why matched: Airworthiness Directives; Pratt & Whitney Division Turbofan Engines

Technical illustration of an aircraft turbine engine assembly
Problem area Engine
View Details View AD (PDF) ↗

2022-06-09 Recurring

final rule

Airworthiness Directives; Pratt & Whitney Division Turbofan Engines

Unsafe Condition: The unsafe condition on these products is the potential for cracks in certain 1st-stage LPC blades, which can lead to engine failure and fire during flight.

Effective: Apr 15, 2022 Category: engine Compliance: Before further flight after the effective date of this AD

Why matched: Airworthiness Directives; Pratt & Whitney Division Turbofan Engines

Technical illustration of an aircraft turbine engine assembly
Problem area Engine
View Details View AD (PDF) ↗

2021-22-14 Recurring

final rule

Airworthiness Directives; Pratt & Whitney Division Turbofan Engines

Unsafe Condition: The LPT 4th-stage air sealing ring segment assemblies moving into the LPT 4th-stage blades knife edge seals, resulting in damage to the ring segment assemblies.

Effective: Dec 17, 2021 Category: aircraft Compliance: Within 50 flight hours

Why matched: Airworthiness Directives; Pratt & Whitney Division Turbofan Engines

View Details View AD (PDF) ↗

2021-05-16 Recurring

final rule

Airworthiness Directives; Pratt & Whitney Division Turbofan Engines

Unsafe Condition: LPT 4th-stage vane cluster assemblies leaning back and notching into rotating LPT 4th-stage blades, causing some blades to fracture and release.

Effective: May 7, 2021 Category: aircraft Compliance: Before further flight

Why matched: Airworthiness Directives; Pratt & Whitney Division Turbofan Engines

View Details View AD (PDF) ↗

2021-05-51

final rule

Airworthiness Directives; Pratt & Whitney Division Turbofan Engines

Unsafe Condition: The failure of a 1st-stage low-pressure compressor (LPC) blade on a PW4077 model turbofan engine resulting in an engine fire during flight.

Effective: Mar 24, 2021 Category: engine Compliance: Before further flight after the effective date of this AD.

Why matched: Airworthiness Directives; Pratt & Whitney Division Turbofan Engines

Technical illustration of an aircraft turbine engine assembly
Problem area Engine
View Details View AD (PDF) ↗

2020-25-09

final rule

Airworthiness Directives; Pratt & Whitney Division Turbofan Engines

Unsafe Condition: damaged or failed 3rd stage LPT duct segments on PW engines with the Talon IIB outer combustion chamber assembly configuration installed, resulting in engine surges, in-flight shutdowns, diversions...

Effective: Jan 14, 2021 Category: aircraft Compliance: Before further flight

Why matched: Airworthiness Directives; Pratt & Whitney Division Turbofan Engines

Technical illustration of an aircraft turbine engine assembly
Problem area Engine
View Details View AD (PDF) ↗

2019-06-07 Recurring

final rule

Airworthiness Directives; Pratt & Whitney Division Turbofan Engines

Unsafe Condition: cracks in the fuel nozzle braze joint and cracks in the fuel manifold tube adjacent to the elbow fitting

Effective: May 2, 2019 Category: aircraft Compliance: Within 60 months after the effective date of this AD

Why matched: Airworthiness Directives; Pratt & Whitney Division Turbofan Engines

Technical illustration of an aircraft fuel pump, filter, valve, and lines
Problem area Fuel system
View Details View AD (PDF) ↗

2019-06-02

final rule

Airworthiness Directives; Pratt & Whitney Division Turbofan Engines

Unsafe Condition: High cycle fatigue (HCF) cracks found in the fuel nozzle supply manifold.

Effective: Apr 30, 2019 Category: aircraft Compliance: Before further flight

Why matched: Airworthiness Directives; Pratt & Whitney Division Turbofan Engines

Technical illustration of an aircraft fuel pump, filter, valve, and lines
Problem area Fuel system
View Details View AD (PDF) ↗

2019-03-01 Recurring

final rule

Airworthiness Directives; Pratt & Whitney Division (PW) Turbofan Engines

Unsafe Condition: an in-flight failure of a 1st-stage low-pressure compressor (LPC) blade

Effective: Mar 22, 2019 Category: aircraft Compliance: Within 50 flight hours

Why matched: Airworthiness Directives; Pratt & Whitney Division (PW) Turbofan Engines

Technical illustration of an aircraft turbine engine assembly
Problem area Engine
View Details View AD (PDF) ↗

2018-21-11 Recurring

final rule

Airworthiness Directives; Pratt & Whitney Division (PW) Turbofan Engines

Unsafe Condition: certain LPC fan hubs could crack before their published life limit due to low-cycle fatigue

Effective: Dec 5, 2018 Category: aircraft Compliance: Within 50 flight hours

Why matched: Airworthiness Directives; Pratt & Whitney Division (PW) Turbofan Engines

View Details View AD (PDF) ↗

2018-14-10

final rule

Airworthiness Directives; Pratt & Whitney Division Turbofan

Unsafe Condition: An unrecoverable engine in-flight shutdown (IFSD) after an ice crystal icing event.

Effective: Sep 28, 2018 Category: engine Compliance: Within 50 flight hours

Why matched: Airworthiness Directives; Pratt & Whitney Division Turbofan

View Details View AD (PDF) ↗

2018-13-02

final rule

Airworthiness Directives; Pratt & Whitney Division Turbofan Engines

Unsafe Condition: multiple cracked 4th stage low-pressure turbine (LPT) air seals in the fleet

Effective: Jul 20, 2018 Category: engine Compliance: the next time the 4th stage LPT vanes are removed from the LPT module

Why matched: Airworthiness Directives; Pratt & Whitney Division Turbofan Engines

Technical illustration of an aircraft turbine engine assembly
Problem area Engine
View Details View AD (PDF) ↗

2018-02-10 Recurring

final rule

Airworthiness Directives; Pratt & Whitney Division Turbofan Engines

Unsafe Condition: multiple cracked outer diffuser cases

Effective: Feb 26, 2018 Category: aircraft Compliance: within 1,000 flight cycles from the effective date of this AD

Why matched: Airworthiness Directives; Pratt & Whitney Division Turbofan Engines

View Details View AD (PDF) ↗

2017-12-03

final rule

Airworthiness Directives; Pratt & Whitney Division Turbofan Engines

Unsafe Condition: An unrecoverable engine in-flight shutdown (IFSD) after an ice crystal icing event, followed by an attempt to rapidly restart the engine with the Electronic Engine Control (EEC) Active Clearance Co...

Effective: Jul 20, 2017 Category: engine Compliance: Within the next engine shop visit for engines currently operating in the Asia Pacific region; for...

Why matched: Airworthiness Directives; Pratt & Whitney Division Turbofan Engines

Technical illustration of an aircraft turbine engine assembly
Problem area Engine
View Details View AD (PDF) ↗

2017-05-05

final rule

Airworthiness Directives; Pratt & Whitney Division Turbofan Engines

Unsafe Condition: Uncontained failure of a high-pressure turbine (HPT) hub during takeoff, caused by a machining anomaly in the aft web/rim fillet area of the HPT 1st stage hub.

Effective: Apr 13, 2017 Category: aircraft Compliance: Within the next engine shop visit or next time the engine is disassembled sufficiently to expose ...

Why matched: Airworthiness Directives; Pratt & Whitney Division Turbofan Engines

Technical illustration of an aircraft turbine engine assembly
Problem area Engine
View Details View AD (PDF) ↗

2016-22-05 Recurring

final rule

Airworthiness Directives; Pratt & Whitney Division Turbofan Engines

Unsafe Condition: nine instances of fuel leaks on PW engines with the Talon IIB combustion chamber configuration installed

Effective: Dec 6, 2016 Category: engine Compliance: Within 800 flight hours after the effective date of this AD, and thereafter within every 800 flig...

Why matched: Airworthiness Directives; Pratt & Whitney Division Turbofan Engines

Technical illustration of an aircraft turbine engine assembly
Problem area Engine
View Details View AD (PDF) ↗

2016-08-09

final rule

Airworthiness Directives; Pratt & Whitney Division Turbofan Engines

Unsafe Condition: Crack found in the high-pressure compressor (HPC) 10th stage disk, caused by surface scratches from a manual polishing procedure during manufacture.

Effective: Jun 1, 2016 Category: engine Compliance: Within the compliance times specified in the AD, unless already done.

Why matched: Airworthiness Directives; Pratt & Whitney Division Turbofan Engines

Technical illustration of an aircraft turbine engine assembly
Problem area Engine
View Details View AD (PDF) ↗

2015-22-03

final rule

Airworthiness Directives; Pratt & Whitney Division Turbofan Engines

Unsafe Condition: cracks in the barrel section of the LPT 4th stage IAS which could, if not corrected, result in uncontained IAS release, damage to the engine, and damage to the aircraft.

Effective: Dec 1, 2015 Category: engine Compliance: Within 10,900 cycles since new or at each LPT overhaul after the effective date of this AD.

Why matched: Airworthiness Directives; Pratt & Whitney Division Turbofan Engines

View Details View AD (PDF) ↗

2015-21-04

final rule

Airworthiness Directives; Pratt & Whitney Turbofan Engines

Unsafe Condition: Crack finds in the 6th stage low-pressure turbine (LPT) disk could lead to failure, uncontained disk release, damage to the engine, and damage to the airplane.

Effective: Nov 27, 2015 Category: engine Compliance: At the next LPT shop visit after the effective date of this AD.

Why matched: Airworthiness Directives; Pratt & Whitney Turbofan Engines

Technical illustration of an aircraft turbine engine assembly
Problem area Engine
View Details View AD (PDF) ↗

2015-17-17

final rule

Airworthiness Directives; Pratt & Whitney Turbofan Engines

Unsafe Condition: Fuel nozzle-to-fuel supply manifold interface fuel leaks.

Effective: Oct 2, 2015 Category: engine Compliance: Within 800 flight hours after the effective date of this AD, and within every 800 flight hours si...

Why matched: Airworthiness Directives; Pratt & Whitney Turbofan Engines

Technical illustration of an aircraft fuel pump, filter, valve, and lines
Problem area Fuel system
View Details View AD (PDF) ↗

2015-14-05

final rule

Airworthiness Directives; Pratt & Whitney Turbofan Engines

Unsafe Condition: Reports of cracking in the low-pressure turbine (LPT) shaft.

Effective: Aug 25, 2015 Category: engine Compliance: Within the compliance times specified, unless already done.

Why matched: Airworthiness Directives; Pratt & Whitney Turbofan Engines

Technical illustration of an aircraft turbine engine assembly
Problem area Engine
View Details View AD (PDF) ↗