85540021
COVER PLATE
Specifications
- Part Number
- 85540021
- Manufacturer
- —
- ATA ChapterMaintenance system chapter
- 55 — StabilizersField reports: 55 (100%) — 7 reports
- CapabilitySystem area (hydraulics, avionics, landing gear…)
- Structures
- Inventory ClassRotable, expendable, or consumable
- Expendable
- Certification
- PMA
- Aircraft Category
- Unknown
- Criticality
- Standard
- Life & ShelfTypical service/shelf life — verify against OEM data
- —
Service Reliabilityfrom FAA SDR (Service Difficulty Reports)
100%
Component-change rate (FAA K-code)*
* Structural ATA chapter (55). 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
- 7
- Replace events
- 5
- Repair events
- 2
- K-code events
- 7
Reporting window 1998-05-27 – 1998-06-04Dominant chapter ATA 55
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)
Data Sources(1)
- 2026-03-07
Quick Facts
Airframes2 applicable
AlternatesNone recorded
ClassExpendable
CriticalityStandard
CategoryUnknown
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