What was found
AFTER 4 ATTEMPTS APU WILL NOT START. REACHES 25% 777 EGT, OIL QTY 75%(<P>PERFORMED APU BITE TEST PER 767 FIM TASK 49-11 FAULT TREE 958.</P><P>NO DISCREPANCY NOTED, APU OPERATING AT NORMAL CONDITIONS.</P>)
- Difficulty date
- March 23, 2021
- Submitted
- March 29, 2021
- Operation
- Air carrier
- Aircraft
- N640GT
- Make and model
- Boeing 7673S1
- Aircraft serial
- 25221
- Aircraft time
- 92,356 hours, 19,742 cycles
- System (JASC)
- 4940 · APU Start/Ignition System
- Part
- Apu
- Condition
- Malfunctioned
- Stage of operation
- IN
- How discovered
- 9
- Nature of condition
- O
- Precautionary procedure
- K
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.