Service difficulty report · Starter · Boeing 777222

Difficulty date
March 31, 2006
Submitted
April 11, 2006
Operation
Air carrier
Aircraft
N791UA
Make and model
Boeing 777222
Aircraft serial
26933
Aircraft time
37,946 hours, 5,850 cycles
Engine
Pwa PW4090
Part
Starter
Condition
Malfunctioned
Location
Apu
Stage of operation
NR
How discovered
O
Nature of condition
O
Precautionary procedure
A

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

What was found

LEFT IDG FAILED EN ROUTE, APU NO START. APU ELECT STARTER FAILS CHRONIC APU ELECTRIC STARTER PROBLEMS - 7 STARTERS SINCE APU INSTALLATION JAN 05, + 3 START CONTACTORS 2 APU BATTS, 2 CHARGERS SEVERAL APUC'S, AUTO START CONT RELAYS AND VARIOUS OTHER APU COMPONENTS BUT NO CK OF STARTER CRANK CKT BETWEEN START CONTACTOR & STARTER. REF WDM 24-31-21 PG 3.1 SHTS 1-3. ACMP VISUAL CHECK OF APU BATT CONNECTOR & GND GD7-DC, STARTER PARALLEL FEEDER SPLICES SM1-SM2, FIREWALL DISC BLOCK TS4902 & STARTER TERMINALS FOR EVIDENCE OF OVERHEATING-ARCING. CK STARTER GNDS GD10-DC & GD187-DC FOR COND AND SEC.