3B391C
CIRCUIT BREAKER
Specifications
- Part Number
- 3B391C
- Manufacturer
- Honeywell
- ATA ChapterMaintenance system chapter
- 24 — Electrical PowerField reports: 25 (69%) · 24 (23%) · 21 (8%) — 13 reports
- CapabilitySystem area (hydraulics, avionics, landing gear…)
- Electromechanical
- Inventory ClassRotable, expendable, or consumable
- Rotable
- Certification
- OEM
- Aircraft Category
- Unknown
- Criticality
- Standard
- Life & ShelfTypical service/shelf life — verify against OEM data
- —
Service Reliabilityfrom FAA SDR (Service Difficulty Reports)
100%
Scrap Propensity (SDR-derived)
- SDR reports
- 13
- Replace events
- 13
- Repair events
- 0
- K-code events
- 7
Reporting window 2008-03-12 – 2025-09-25Dominant chapter ATA 25
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(4)
Data Sources(1)
- 2026-03-07
Quick Facts
Airframes4 applicable
AlternatesNone recorded
ClassRotable
CriticalityStandard
CategoryNarrow & wide-body
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