What was found
RIGHT PACK WILL NOT OPERATE IN STANDBY WITH LEFT PACK ON. REPLACED RT TEMP CONTROL VALVE ALTITUDE SWITCH, CAPTS TRIM AIR VALVE, LT PACK CONTROLLER CHECKED OK ON GROUND BITE CHECK ON LT AND RT AND STANDBY CONTROLLER OK, NO FAULTS.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
RIGHT PACK WILL NOT OPERATE IN STANDBY WITH LEFT PACK ON. REPLACED RT TEMP CONTROL VALVE ALTITUDE SWITCH, CAPTS TRIM AIR VALVE, LT PACK CONTROLLER CHECKED OK ON GROUND BITE CHECK ON LT AND RT AND STANDBY CONTROLLER OK, NO FAULTS.