As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
REF T/C 78349002: APU ECU BITE SHOWS MAINTENANCE HISTORY LEVEL FAULT 49 94226 "LOW OIL PRESSURE SWITCH SHOWS OPEN CIRCUIT" LOGGED FOR LAST 80 STARTS. ACCOMP T/S FOR FLT 49 94226 PER FIM 49 90 00 810 805 CONFIRMED. FOUND RES OF YAAT008 LOW OIL PRES SWITCH PINS 1 AND 2 OUT OF LIMIT PER STEP F.(3)(F). REPLACED LOW OIL PRESS SWITCH PER MM 49 94 22 000 801 / MM 49 94 22 400 801. PERF LOW OIL PRESS SWITCH INST TEST PER MM 49 94 22 400 801 OPS NORMAL, NO LEAKS NOTED.