Service difficulty report · Igniter · Boeing 747422

Difficulty date
May 16, 2012
Submitted
July 26, 2012
Operation
Air carrier
Aircraft
N116UA
Make and model
Boeing 747422
Aircraft serial
26908
Aircraft time
54,987 hours, 6,420 cycles
Engine
Pwa PW4056
Engine time
3,200 hours, 19,164 cycles
Part
Igniter
Condition
Failed
Location
Nr 1 Engine
Stage of operation
TX
How discovered
O
Nature of condition
J
Precautionary procedure
O

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

What was found

CREW HAS REPORTED THAT THE NR 1 ENGINE DID NOT START USING THE NR 1 IGNITION. ENGINE DID START NORMAL WITH BOTH IGNITERS SELECTED. TROUBLESHOT IAW 74-00, FAULT TREE AUDIBLE CHECK OF NR 1 SYS. REPLACED IGNITER PLUG NR 1 OF NR 1 ENGINE AND NR 1 ENGINE STARTED WITH NR 1 IGN SYS OPS CHECKED NORMAL AS PER AMM 74-00-00.