What was found
EMERGENCY LIGHTS DON'T AGREE WITH COMMANDED SWITCH POSITION. REMOVED AND REPLACED UPPER DECK RIGHT BACK EMERGENCY BATTERY SUPPLY ASSEMBLY IAW B747-400 AMM 33-51-04. ALL CHECKS GOOD.
- Difficulty date
- September 3, 2022
- Submitted
- September 7, 2022
- Operation
- Air carrier
- Aircraft
- N742CK
- Make and model
- Boeing 747446
- Aircraft serial
- 24424
- Aircraft time
- 113,543 hours, 23,927 cycles
- System (JASC)
- 3300 · Lighting System
- Part
- None
- Part number
- 90083
- Part serial
- 40212
- Condition
- Unserviceable
- Location
- R/H Aft
- Stage of operation
- UK
- How discovered
- 9
- Nature of condition
- O
- Precautionary procedure
- K
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.