SDR ASAA2014090109029

Service difficulty report · Gcu · Boeing 737890

Difficulty date: September 1, 2014
Submitted: September 4, 2014
Operation: Air carrier
Aircraft: N579AS
Make and model: Boeing 737890
Aircraft serial: 35187
Aircraft time: 28,722 hours, 8,583 cycles
System (JASC): 2421 · AC Generator-Alternator
Part: Gcu
Condition: Malfunctioned
Location: Nr 1
Stage of operation: TX
How discovered: O
Nature of condition: J
Precautionary procedure: D

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

What was found

AFTER ENGINE START, NR 1 ENGINE GENERATOR SHOWED NO VOLTS OR FREQUENCIES. WOULD NOT GO ON LINE. ACFT GROUNDED. NR 1 GCU LOGGED IDG FAULT. CLEARED FAULT & NR 1 GCU BITE, CHECKED NORMAL IAW FIM 24-21, TASK 801. SUBSEQUENT ENGINE RUN NR 1 IDG, OPS CHECKED NORMAL, IAW FIM 24-21, TASK 805. NO FAULTS LOGGED AFTER ENGINE SHUTDOWN.