What was found
AFTER START APU WOULD NOT COME ON BUSSES. BLUE "APU GEN OFF BUS " IS ILLUMINATED BUT 0 VOLTS AND FREQ. GROUNDED - YES. WORKED IN CONJUNCTION W/ LOGPAGE 12163865 REMOVED AND REPLACED STARTER GENERATOR REF B737-900 AMM 49-41-21-400-801.
- Difficulty date
- February 17, 2020
- Submitted
- February 26, 2020
- Operation
- Air carrier
- Aircraft
- N431AS
- Make and model
- Boeing 737990ER
- Aircraft serial
- 43255
- Aircraft time
- 25,035 hours, 8,111 cycles
- System (JASC)
- 4940 · APU Start/Ignition System
- Part
- Starter Gen
- Part number
- 28B5459
- Part serial
- 83F0624
- Condition
- Inoperative
- Location
- Apu
- Part time
- 7,363 hours, 13,807 cycles
- Stage of operation
- NR
- How discovered
- O
- Nature of condition
- O
- Precautionary procedure
- O
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.