Service difficulty report · Charger · Boeing 747422

Difficulty date
February 16, 2011
Submitted
March 10, 2011
Operation
Air carrier
Aircraft
N173UA
Make and model
Boeing 747422
Aircraft serial
24380
Aircraft time
81,445 hours, 9,245 cycles
Engine
Pwa PW4056
Part
Charger
Part number
425402
Part serial
178
Condition
Failed
Location
Master Battery
Stage of operation
IN
How discovered
9
Nature of condition
J
Precautionary procedure
K

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

AFTER STBY BAT TEST BAT DISCHARGE MAIN EICAS MSG COMES BACK ON FOR 10 TO 15 SEC INTERMITTENT. REPLACED MAIN BATTERY CHARGER AND TESTS OK IAW MM.