As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
APU FAULT LIGHT ILLUMINATED APU AUTO SHUT DOWN. GROUNDED - YES. PER B737-900 FIM 49-50 TASK 801 REMOVED & REPLACED DELTA PRESSURE SENSOR REF B737-900 AMM 49-52-33. OPS CK GOOD. APU RUNS & DOES NOT AUTO SHUTDOWN. BLEED AIR OPERATIVE. NO FAULTS FOUND IN CURRENT STATUS. PERFORMED OPS CK OF INLET GUIDE VANE. LEAK CK GOOD. REF AMM 49-52-12-400-801. RMVD MEL 49-1B.