72057
VALVE SEAT
Specifications
- Part Number
- 72057
- Manufacturer
- LYC
- 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)
33%
Scrap Propensity (SDR-derived)
- SDR reports
- 3
- Replace events
- 1
- Repair events
- 2
- K-code events
- 3
Reporting window 2001-07-20 – 2002-09-27Dominant 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.
Airframe Applicability(2)
Alternate / Related Part Numbers(1)
AEL72057 (and oversizes up to .030”)pma replacement
Data Sources(1)
- 2026-03-07
Quick Facts
Airframes2 applicable
Alternates1 found
ClassExpendable
CriticalityStandard
CategoryGeneral-Aviation
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