As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT 3511, APU FAILED TO COLD START 3 ATTEMPTS FL390 TEMP-60- PEAK EGT 805. CORRECTIVE ACTION: DEFERRED PER MEL 49-10-01A (19OCT23 MSP - REMOVED THERMOCOUPLE 59KV34 9:00 POSITION. FOUND PIECE ON TIP OF PROBE BROKEN OFF. LOOKED UP TAILPIPE FOR 59KV35 AT THE 12:00 POSITION ALSO BROKEN OFF. INSTALLED 59KV34 REF 350 MM 49-72. REPLACED BROKE THERMOCOUPLE 1200 POS PER A350 AMM 49-72. (LP 4507490)