SDR ASAA2016062717183

Service difficulty report · Warning System · Boeing 737990ER

Difficulty date: June 27, 2016
Submitted: June 29, 2016
Operation: Air carrier
Aircraft: N433AS
Make and model: Boeing 737990ER
Aircraft serial: 41704
Aircraft time: 10,754 hours, 3,451 cycles
System (JASC): 2210 · Autopilot System
Part: Warning System
Condition: False Activation
Location: Cockpit
Stage of operation: TX
How discovered: O
Nature of condition: N
Precautionary procedure: K

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

What was found

AFTER POWER INTERRUPTION, F/O'S PFD DISPLAYS FD AMBER WARNING, ALSO, F/O'S FD SWITCH TURNED TO ON, THERE'S NO FD OR MA ON F/O'S SIDE. ACFT GROUNDED. CYCLED POWER, OPS NORMAL, DUE TO WEAK GPU, ACCOMPLISHED DFCS BITE NO FAULTS NOTED, REF FIM 22-11, TASK 801, ETOPS SIGNIFICANT SYS GROUND VERIFICATION SUCCESSFUL.