Service difficulty report · Exciter · Boeing 777222

Difficulty date
October 7, 2012
Submitted
November 16, 2012
Operation
Air carrier
Aircraft
N787UA
Make and model
Boeing 777222
Aircraft serial
26939
Aircraft time
68,210 hours, 9,883 cycles
Engine
Pwa PW40903
System (JASC)
7412 · Exciter
Part
Exciter
Part number
50U984
Part serial
265
Condition
Failed
Location
Lt Engine
Stage of operation
IN
How discovered
O
Nature of condition
O
Precautionary procedure
K

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

What was found

ENGINE IGNITOR L2 LEFT ENGINE FAILED TO IGNITE USING IGNITOR 2. FAILED AUDIBLE TEST PER MM, NO POP. REPLACED IGNITION EXCITER IGNITION LEAD AND IGNITION PLUG AND ACCOMPLISHED IGNITION SYSTEM, OPERATIONAL CHECK BOTH L1 AND L2 FUNCTIONED NORMAL.