146A53421
ATTACH FITTING
Specifications
- Part Number
- 146A53421
- Manufacturer
- Boeing
- ATA ChapterMaintenance system chapter
- 53 — Fuselage
- CapabilitySystem area (hydraulics, avionics, landing gear…)
- Structures
- Inventory ClassRotable, expendable, or consumable
- Expendable
- Certification
- —
- Aircraft Category
- Commercial-Transport
- Criticality
- High
Service Reliabilityfrom FAA SDR (Service Difficulty Reports)
100%
Component-change rate (FAA K-code)*
* Structural ATA chapter (53). Verb-based propensity is suppressed because "REPAIRED" in the SDR text typically refers to the airframe being repaired around the part, not the part itself. FAA K-code component-change rate is the honest signal.
- SDR reports
- 40
- Replace events
- 6
- Repair events
- 34
- K-code events
- 40
Reporting window 2012-08-22 – 2019-02-08Dominant chapter ATA 53
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
ClassExpendable
CriticalityHigh
CategoryCommercial-Transport
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