What was found
APU GENERATOR FAILS TO COME ONLINE. GROUNDED - YES. FOUND START POWER UNIT FAULTY. REMOVED AND REPLACED START POWER UNIT IAW AMM 49-41-71. OPS CHECKS GOOD. VERIFIED APU GENERATOR COMES ONLINE AFTER APU START ON BATTERY.
- Difficulty date
- May 18, 2019
- Submitted
- May 20, 2019
- Operation
- Air carrier
- Aircraft
- N581AS
- Make and model
- Boeing 737890
- Aircraft serial
- 35188
- Aircraft time
- 45,734 hours, 13,671 cycles
- System (JASC)
- 4940 · APU Start/Ignition System
- Part
- Power Unit
- Part number
- 1152464265
- Part serial
- 115246401675
- Condition
- Failed
- Location
- E&E Bay
- Part time
- 45,741 hours, 13,675 cycles
- Stage of operation
- IN
- How discovered
- O
- Nature of condition
- O
- Precautionary procedure
- K
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.