As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
APU BLEED AIR ON STATUS.MAT SHOWS APU BLEED AIR CK VALVE LATCHED. FIM 49-52 AND PERFORM TSK 808. RPR OR RPL AS NEEDED. INCLD FNDG'S IN ACP W-U. CHK VLVE PCN: 295-1003. PT SENSOR: 295-0004 INLET PRESS SNSR: 295-0003. REPLACED CHECK VALVE. REPLACED TOTAL PRESS SENSOR. REPLACED INLET PRESS SENSOR. ACP APU AIR START. 94388 MAT SHOWS NOT ACTIVE, OPS CHKS OKAY.