Service difficulty report · Battery · Boeing 747422

Difficulty date
January 26, 2011
Submitted
February 17, 2011
Operation
Air carrier
Aircraft
N173UA
Make and model
Boeing 747422
Aircraft serial
24380
Aircraft time
81,203 hours, 9,221 cycles
Engine
Pwa PW4056
Part
Battery
Part number
18550000
Part serial
736
Condition
Discharged
Location
Master
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

STANDBY TEST FAILED. MAIN BATTERY CHARGER SHOWED ONLY 25 AMPS CHARGING. REPLACED MAIN BATTERY IAW MM24-31-01-401 & MAIN BATTERY CHARGER IAW MM. SYS NORMAL.