Service difficulty report · Battery · Boeing 74744AF

Difficulty date
August 18, 2025
Submitted
August 26, 2025
Operation
Air carrier
Aircraft
N576UP
Make and model
Boeing 74744AF
Aircraft serial
35665
Aircraft time
61,526 hours, 9,715 cycles
Part
Battery
Part number
20131A
Part serial
110582
Condition
Inoperative
Location
Zone 200
Stage of operation
IN
How discovered
V
Nature of condition
O
Precautionary procedure
K

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

FOUND THE UPPER DECK AISLE EMERGENCY LIGHT M4915 AND L5733 INOP. I.A.W AMM 33-51-04-902-001-001 REV.114 REPLACED EMERGENCY LIGHT BATTERY (M5169) AT UPPER DECK SIDEWELL & PERFORMED EMERGENCY LIGHT (M4915 L5733) TEST, RESULT WAS SATISFACTORY.

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