What was found
BLUE MAINTENANCE LIGHT ILLUMINATED AFTER APU START. ACFT GROUNDED. CDU SHOWS NO FAULTS OR FAULT HISTORY. OIL QTY = FULL. APU HAS NO HISTORY FOR THIRTY DAYS. UPON 2ND START APU OPS NORMAL WITH NO MAINT LIGHT ON.
- Difficulty date
- June 27, 2013
- Submitted
- July 1, 2013
- Operation
- Air carrier
- Aircraft
- N423AS
- Make and model
- Boeing 737990ER
- Aircraft serial
- 35206
- Aircraft time
- 520 hours, 171 cycles
- System (JASC)
- 4900 · Airborne Auxiliary Power Unit (APU) System
- Part
- Warning Light
- Condition
- False Activation
- Location
- Apu
- Stage of operation
- TX
- How discovered
- O
- Nature of condition
- N
- Precautionary procedure
- O
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.