Service difficulty report · Battery · Boeing 777323ER

Difficulty date
February 13, 2018
Submitted
February 19, 2018
Operation
Air carrier
Aircraft
N721AN
Make and model
Boeing 777323ER
Aircraft serial
31546
Aircraft time
21,144 hours, 2,378 cycles
Part
Battery
Condition
Discharged
Location
Power Assist
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 POWER ASSIST SYSTEM BATTERY FOR THE L1 DOOR TEST LIGHT INOPERATIVE. REMOVED AND REPLACED EMERGENCY POWER ASSIST SYSTEM 9 VOLT BATTERY IAW AMM 52-12-20. ACCOMPLISHED ALL REQUIRED TESTS.