Service difficulty report · Battery Pack · Boeing 737990ER

Difficulty date
October 2, 2025
Submitted
October 7, 2025
Operation
Air carrier
Aircraft
N471AS
Make and model
Boeing 737990ER
Aircraft serial
41703
Aircraft time
40,738 hours, 12,607 cycles
Part
Battery Pack
Condition
Inoperative
Location
Power Supply
Component
Power Supply
Component part number
D71702001
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

EMERGENCY EXTERIOR R/H OVERWING EXIT LIGHTS INOP. GROUNDED - YES. REMOVED AND REPLACED BATTERY PACK M1671 IAW B737 AMM 33-51-06-960-806 OPERATIONAL TEST GOOD. (S/N 118163)