E4A72400000

Name: E4A72400000
SKU: E4A72400000

PISTON

OEM

Specifications

Part Number: E4A72400000
Manufacturer: AUSTRO
ATA ChapterMaintenance system chapter: 85 — Reciprocating Engine
CapabilitySystem area (hydraulics, avionics, landing gear…): Engine Accessories
Inventory ClassRotable, expendable, or consumable: Expendable
Certification: OEM
Aircraft Category: General-Aviation
Criticality: Standard

Service Reliabilityfrom FAA SDR (Service Difficulty Reports)

100%

Scrap Propensity (SDR-derived)

medium confidence

SDR reports: 13
Replace events: 8
Repair events: 0
K-code events: 8

Reporting window 2023-11-18 – 2025-09-25Dominant chapter ATA 85

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

2directives reference this part number — recurring compliance demand wherever it flies

Most recent

FAAAD 2024-19-10effective Oct 9, 2024Prohibition
The FAA is adopting a new airworthiness directive (AD) for certain Austro Engine GmbH (Austro) Model E4 and E4P engines. This AD was prompted by reports of engine failures and an investigation where cracks were discovered on the pistons. This AD requires repetitive borescope inspections (BSIs) for cracks on the pistons, and, if necessary, removal from service and replacement of the piston, and a fuel sample analysis for water contamination and, if contamination is found, replacement of the high-pressure pump (HPP), injectors, and fuel rails. The FAA is issuing this AD to address the unsafe condition on these products.
EASAAD 2024-0172-Eeffective Aug 30, 2024Mixed actions
No summary available - see the EASA publication.

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.