SA539988

INTAKE VALVE

Specifications

Part Number: SA539988
Manufacturer: —
ATA ChapterMaintenance system chapter: 85 — Reciprocating EngineField reports: 85 (100%) — 2 reports
CapabilitySystem area (hydraulics, avionics, landing gear…): Engine Accessories
Inventory ClassRotable, expendable, or consumable: Expendable
Certification: —
Aircraft Category: General-Aviation
Criticality: Critical
Life & ShelfTypical service/shelf life — verify against OEM data: —

Service Reliabilityfrom FAA SDR (Service Difficulty Reports)

—

Component-change rate (FAA K-code)

low confidence

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

Reporting window 1995-09-01 – 2002-05-30Dominant 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

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

Most recent

FAAAD 2023-02-12effective Feb 17, 2023Prohibition
The FAA is adopting a new airworthiness directive (AD) for certain Continental Aerospace Technologies, Inc. (Continental) GTSIO- 520, IO-470, IO-520, IO-550, IOF-550, LIO-470, LIO-520, LTSIO-520, O- 470, TSIO-470, TSIO-520, TSIO-550, TSIOF-550, and TSIOL-550 model reciprocating engines with a certain Superior Air Parts, Inc. (SAP) cylinder assembly or intake valve installed. The affected cylinder assemblies and intake valves are installed as a replacement part under parts manufacturer approval (PMA) on certain affected Continental engines. This AD was prompted by three intake valve failures on reciprocating engines that resulted in engine damage and emergency landing or aborted takeoff. This AD requires replacement of the affected engine intake valve. 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.