- Difficulty date
- May 21, 2021
- Submitted
- May 21, 2021
- Operation
- Air carrier
- Make and model
- Boeing 7673S1
- Aircraft serial
- 25221
- Aircraft time
- 93,139 hours, 19,850 cycles
- Part
- Apu
- Condition
- Unknown
- Stage of operation
- TX
- How discovered
- O
- 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
"APU FAULT" APU WON'T START ON GROUND, HUNG START AT 17%.(<P>TROUBLESHOT APU START FAULT. APU FAULTED @ 7% START. FAULT CLEARED, APU STARTED NORMAL. BATTERY START. APU BATT VOLTAGE 28VDC DIPPED TO 24 VDC. BATT REGAINED 28VDC @ 13 AMPS</P>)