SDR IPXA2026032353595

Service difficulty report · Battery · Boeing 74744AF

Difficulty date: March 19, 2026
Submitted: March 24, 2026
Operation: Air carrier
Aircraft: N574UP
Make and model: Boeing 74744AF
Aircraft serial: 35663
Aircraft time: 65,209 hours, 10,162 cycles
System (JASC): 3350 · Emergency Lighting
Part: Battery
Part number: 20131A
Part serial: 100151
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.

What was found

FOUND EMERGENCY LIGHT L1853, L1854, L5735 INOP. I.A.W AMM 33-51-04-902-001-001 REV.116 REPLACED POWER SUPPLY BATTERY AND CONDITION CHECK NORMAL. I.A.W AMM 33-51-04-902-001-001 REV.116 PERFORMED THE EMERGENCY LIGHT POWER SUPPLY TEST, RESULT WAS SATISFACTORY.

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