SDR ASAA2015060812028

Service difficulty report · Warning Light · Boeing 737890

Difficulty date: June 8, 2015
Submitted: June 11, 2015
Operation: Air carrier
Aircraft: N594AS
Make and model: Boeing 737890
Aircraft serial: 35191
Aircraft time: 27,762 hours, 8,474 cycles
System (JASC): 2410 · Alternator-Generator Drive
Part: Warning Light
Condition: Illuminated
Location: Nr 1 Source
Stage of operation: CR
How discovered: 9
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

NR 1 SOURCE OFF LIGHT ILLUMINATED. NO VOLTS/ FREQUENCY IN CRUISE AT 36,000 FT. ACFT GROUNDED. ACCOMPLISHED GCU BITE TEST NR 1 IAW FIM 24-21, TASK 801, AND RESET. C/W FIM 24-21, TASK 823 SOURCE OFF LIGHT ILLUMINATED AFTER NR 1 ENGINE GROUND RUN, GROUND VERIFICATION SUCCESSFUL. NR 1 SOURCE OFF LIGHT REMAINS EXTINGUISHED, ALL OTHER INDICATIONS NORMAL.