Service difficulty report · Battery Pack · Boeing 777224

Difficulty date
February 28, 2026
Submitted
March 3, 2026
Operation
Air carrier
Aircraft
N77019
Make and model
Boeing 777224
Aircraft serial
35547
Aircraft time
88,211 hours, 8,687 cycles
Part
Battery Pack
Part number
ADD71701100
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

EMERGENCY LIGHTS ZONE 1, LT AREA LIGHTS & CAPT DOME LIGHT IN THE FLT DECK INOPERATIVE. POWER SUPPLY INOPERATIVE IAW WDM 33-51-61-3, REPLACED THE POWER SUPPLY IAW AMM 33-51-06-960-802. PERFORMED A TEST OF THE NEW BATTERY PACK AND WORKING PROPERLY.