As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON ASCENT FROM AUS AIRCRAFT WILL NOT PRESURIZE WITH ONE PACK. ACCOMPLISHED AOM PROCEDURE 2-E-23, NO HELP. RETURN TO AUS. REMOVED AND REPLACED RT AIR CYCLE MACHINE IAW MM 21-51-11. SYSTEM OPS CHECK GOOD. AIRCRAFT RETURNED TO REVENUE SERVICE. (M)