What was found
AIRCRAFT WAS GROUNDED: EMERGENCY LIGHTING SYSTEM FAILS QUICK SYSTEM TEST WITH MAINT MSG45-19570. MAINTENANCE REPLACED WELS CONTROL UNIT AT DOOR L1 (M3351001). OPS CHECKS GOOD. REF AMM 33-51-07.
- Difficulty date
- March 13, 2026
- Submitted
- March 16, 2026
- Operation
- Air carrier
- Aircraft
- N879BH
- Make and model
- Boeing 7878
- Aircraft serial
- 65999
- Aircraft time
- 14,311 hours, 1,931 cycles
- System (JASC)
- 3350 · Emergency Lighting
- Part
- Control Unit
- Condition
- Inoperative
- Location
- Zone 200
- Stage of operation
- IN
- How discovered
- C
- Nature of condition
- L
- Precautionary procedure
- K
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.