21SN4184
PRESSURE SWITCH
Specifications
- Part Number
- 21SN4184
- Manufacturer
- —
- ATA ChapterMaintenance system chapter
- 80 — StartingField reports: 30 (91%) · 75 (9%) — 11 reports
- CapabilitySystem area (hydraulics, avionics, landing gear…)
- unknown
- Inventory ClassRotable, expendable, or consumable
- Expendable
- Certification
- OEM
- Aircraft Category
- —
- Criticality
- —
Service Reliabilityfrom FAA SDR (Service Difficulty Reports)
89%
Scrap Propensity (SDR-derived)
- SDR reports
- 11
- Replace events
- 8
- Repair events
- 1
- K-code events
- 7
Reporting window 2010-10-01 – 2021-12-17Dominant chapter ATA 30
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(6)
Data Sources(1)
- 2026-03-07
Quick Facts
Airframes6 applicable
AlternatesNone recorded
ClassExpendable
CriticalityUnknown
CategoryUnknown
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