What was found
ORD - FLT 4101 - PACK VALVES FAILED IN CRUISE. AIRCRAFT WOULD NOT PRESSURIZE. CREW RETURNED TO ORD FOR MTX. MTX RESET POWER AND NO DEFECTS NOTED. OPS CHECKED GOOD. (X)
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
ORD - FLT 4101 - PACK VALVES FAILED IN CRUISE. AIRCRAFT WOULD NOT PRESSURIZE. CREW RETURNED TO ORD FOR MTX. MTX RESET POWER AND NO DEFECTS NOTED. OPS CHECKED GOOD. (X)