What was found
FLIGHT MGE301, APU INFLIGHT START FAILED. FOUND APU DIFF PRESSURE SWITCH FAULTY. R & R DIFFERENTIAL PRESSURE SWITCH IAW AMM. OPS CHECK NORMAL, APU VERIFICATION FLIGHT SUCCESSFUL.
- Difficulty date
- June 23, 2026
- Submitted
- June 26, 2026
- Operation
- Air carrier
- Aircraft
- N757QM
- Make and model
- Boeing 75729J
- Aircraft serial
- 27203
- Aircraft time
- 69,756 hours, 35,451 cycles
- System (JASC)
- 4940 · APU Start/Ignition System
- Part
- Pressure Switch
- Part number
- 99193S0CN
- Part serial
- 38760483
- Condition
- Faulted
- Location
- Apu
- Stage of operation
- DE
- 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.