52A241

FAN BLADE

Specifications

Part Number: 52A241
Manufacturer: PWA
ATA ChapterMaintenance system chapter: 72 — Engine - Turbine / Turboprop
CapabilitySystem area (hydraulics, avionics, landing gear…): Engine Accessories
Inventory ClassRotable, expendable, or consumable: —
Certification: —
Aircraft Category: Unknown
Criticality: Critical & Life-Limited

Service Reliabilityfrom FAA SDR (Service Difficulty Reports)

—

Component-change rate (FAA K-code)

low confidence

SDR reports: 2
Replace events: 0
Repair events: 1
K-code events: 0

Reporting window 2004-01-05 – 2011-01-25Dominant chapter ATA 72

Directional indicator only. Reflects what operators reported to the FAA when a difficulty was logged — not a fleet-normalized failure rate or a cost-based BER. Use alongside operator-specific data.

Airworthiness Directive coverage

FAA / EASA public regulatory data

1directive references this part number — recurring compliance demand wherever it flies

Most recent

FAAAD 2022-06-09effective Apr 15, 2022Mixed actionsNamed as replacement part
The FAA is superseding Airworthiness Directive (AD) 2019-03-01 and AD 2021-05-51 for certain Pratt & Whitney Division (PW) PW4074, PW4074D, PW4077, PW4077D, PW4084D, PW4090, and PW4090-3 model turbofan engines. AD 2019-03-01 required performing initial and repetitive thermal acoustic image (TAI) inspections for cracks in certain 1st- stage low-pressure compressor (LPC) blades and removal of those blades that fail inspection. AD 2021-05-51 required performing a one-time TAI inspection for cracks in certain 1st-stage LPC blades and removal of those blades that fail inspection. This AD was prompted by three in- flight failures of a 1st-stage LPC blade, with one failure resulting in an engine fire during flight, and subsequent manufacturer publication of service information specifying improved inspections for three critical locations on the 1st-stage LPC blade. This AD requires initial and repetitive ultrasonic (UT) inspections and TAI inspections for cracks in certain 1st-stage LPC blades and removal of those blades that fail inspection. The FAA is issuing this AD to address the unsafe condition on these products.

Directives citing this part number in the FAA / EASA regulatory corpus we have processed — not a complete historical AD list. An AD is a compliance requirement that drives scheduled work (inspections, replacements, modifications) on the fleets that carry the part; a directive naming this PN as the replacement part is install demand, not an action against it — and none of this is a prediction that the part will fail.