SDR UALA2009031000430

Service difficulty report · Igniter Box · Boeing 777222

Difficulty date: February 8, 2009
Submitted: April 6, 2009
Operation: Air carrier
Aircraft: N778UA
Make and model: Boeing 777222
Aircraft serial: 26940
Aircraft time: 51,525 hours, 9,455 cycles
Engine: Pwa PW4077
System (JASC): 4940 · APU Start/Ignition System
Part: Igniter Box
Condition: Faulty
Location: Apu
Stage of operation: CR
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

APU START SYS APUC DETECTED FAILURE IN THE ELECTRIC STARTER, FUEL SCHEDULING, IGNITION, OR LUBE DEPRIME SYSTEMS OR NO SIGNAL FROM ELMS TO THE APUC. REPLACED EXCITER CLUSTER APU IGNITION BOX (P/N 3876195-8), BOTH LEADS (P/N 3888283-2 & 3888283-4), AND BOTH PLUGS (P/N 3888267-7 (2EA). START WAS NORMAL.