SDR ASAA2015032811156

Service difficulty report · Exciter · Boeing 737990ER

Difficulty date: March 28, 2015
Submitted: March 31, 2015
Operation: Air carrier
Aircraft: N461AS
Make and model: Boeing 737990ER
Aircraft serial: 36363
Aircraft time: 3,890 hours, 1,288 cycles
System (JASC): 4940 · APU Start/Ignition System
Part: Exciter
Part number: 38880587
Part serial: 140153
Condition: Failed
Location: Apu
Part time: 871 hours, 1,884 cycles
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

APU FAULT LIGHT ON TAXI IN WAS ON MORE THAN 5 MIN, THEN EXTINGUISHED. ACFT GROUNDED. REPLACED APU EXCITER IGNITION BOX IAW NG AMM 49-41-31-000-801 FOR REMOVAL AND AMM 49-41-31-400-801 FOR INSTALLATION. REPLACED APU IGNITER PLUG LEAD IAW AMM 49-41-52-000-801 FOR REMOVAL AND AMM 49-41-52-400-801 FOR INSTALLATION. REPLACED APU IGNITER PLUG IAW AMM 49-41-51-000-801 FOR REMOVAL AND AMM 49-41-51-400-801 FOR INSTALLATION. OPS CHECK OF APU IAW AMM 49-11-00-860-801. OPS CK GOOD.