4091640-902
PANEL AY
Specifications
- Part Number
- 4091640-902
- Manufacturer
- Honeywell
- ATA ChapterMaintenance system chapter
- 22 — Auto Flight
- CapabilitySystem area (hydraulics, avionics, landing gear…)
- —
- Inventory ClassRotable, expendable, or consumable
- —
- Certification
- OEM
- Aircraft Category
- —
- Criticality
- —
- Life & ShelfTypical service/shelf life — verify against OEM data
- —
Airworthiness Directive coverage
FAA / EASA public regulatory data
- FAAAD 2026-12-07effective Jul 20, 2026ProhibitionNamed as replacement part
The FAA is adopting a new airworthiness directive (AD) for certain The Boeing Company Model 787-8, 787-9, and 787-10 airplanes. This AD was prompted by reports of an uncommanded change to the mode control panel (MCP) selected altitude. This AD requires replacing the existing MCP with an updated MCP and performing an installation test. The FAA is issuing this AD to address the unsafe condition on these products.
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(2)
Data Sources
No source records linked.
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