21C1321
PRESSURE SWITCH
Specifications
- Part Number
- 21C1321
- Manufacturer
- Eaton
- ATA ChapterMaintenance system chapter
- 28 — Fuel
- CapabilitySystem area (hydraulics, avionics, landing gear…)
- Electromechanical
- Inventory ClassRotable, expendable, or consumable
- Expendable
- Certification
- OEM
- Aircraft Category
- Unknown
- Criticality
- Standard
Service Reliabilityfrom FAA SDR (Service Difficulty Reports)
100%
Scrap Propensity (SDR-derived)
- SDR reports
- 78
- Replace events
- 72
- Repair events
- 0
- K-code events
- 28
Reporting window 2007-10-28 – 2026-04-20Dominant chapter ATA 28
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(12)
Data Sources(1)
- 2026-03-07
Quick Facts
Airframes12 applicable
AlternatesNone recorded
ClassExpendable
CriticalityStandard
CategoryUnknown
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