Pratt & Whitney Division United Technologies Corporation Airworthiness Directives

237 ADs indexed for Pratt & Whitney Division United Technologies Corporation aircraft.

Models

Recent ADs

2026-09-02 Recurring

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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

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2023-22-02 Recurring

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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

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2023-19-02 Recurring

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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

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2022-12-12

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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

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2022-07-13

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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

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2022-06-09 Recurring

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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

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2021-22-14 Recurring

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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

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2021-05-16 Recurring

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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

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2021-05-51

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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

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2020-25-09

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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

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2019-06-07 Recurring

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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

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2019-06-02

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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

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2019-03-01 Recurring

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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

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2018-21-11 Recurring

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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

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2018-14-10

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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

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2018-13-02

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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

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2018-02-10 Recurring

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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

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2017-12-03

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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

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2017-05-05

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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

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2016-22-05 Recurring

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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

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