E21327107
CONTROL UNIT
Specifications
- Part Number
- E21327107
- Manufacturer
- BARFIELD
- ATA ChapterMaintenance system chapter
- 32 — Landing Gear
- CapabilitySystem area (hydraulics, avionics, landing gear…)
- Avionics / Electronics
- Inventory ClassRotable, expendable, or consumable
- Rotable
- Certification
- OEM
- Aircraft Category
- Multi-Category
- Criticality
- Standard
Service Reliabilityfrom FAA SDR (Service Difficulty Reports)
- SDR reports
- 30
- Replace events
- 29
- Repair events
- 0
- K-code events
- 3
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.
Airworthiness Directive coverage
FAA / EASA public regulatory data
- FAAAD 2023-25-05effective Feb 7, 2024ProhibitionNamed as replacement part
The FAA is superseding Airworthiness Directive (AD) 2022-07- 15, which applied to all Airbus SAS Model A318, A319, A320, and A321 series airplanes. AD 2022-07-15 required replacing affected braking and steering control units (BSCUs) and revising the operator's existing FAA-approved minimum equipment list (MEL). This AD was prompted by a determination that a type 1 relay combined with an affected BSCU would induce BSCU freezing. This AD removes certain airplanes from the applicability, retains the requirements of AD 2022-07-15, requires an inspection for the relay type installed and replacement of type 1 relays with type 2 relays, limits the installation of affected BSCUs on certain airplanes and prohibits the installation of affected BSCUs for certain other airplanes as specified in a European Union Aviation Safety Agency (EASA) AD, which is incorporated by reference. The FAA is issuing this AD to address the unsafe condition on these products.
- EASAAD 2023-0093-R1effective May 19, 2023Prohibition
No summary available - see the EASA publication.
- EASAAD 2022-0032effective Aug 5, 2022Prohibition
No summary available - see the EASA publication.
Directives citing this part number in the FAA / EASA regulatory corpus we have processed — not a complete historical AD list. An AD is a compliance requirement that drives scheduled work (inspections, replacements, modifications) on the fleets that carry the part; a directive naming this PN as the replacement part is install demand, not an action against it — and none of this is a prediction that the part will fail.
Airframe Applicability(8)
Data Sources(1)
- 2026-03-07
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