What was found
ACFT WOULD NOT PRESSURIZE AFTER LIFTOFF. MAIN VALVES BOTH ON, DUMP VALVE CLOSED, CB'S ALL IN, AND AUTO PRESS SWITCH IN AUTO. CLIMBED TO 10000 BEFORE TURNING BACK.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
ACFT WOULD NOT PRESSURIZE AFTER LIFTOFF. MAIN VALVES BOTH ON, DUMP VALVE CLOSED, CB'S ALL IN, AND AUTO PRESS SWITCH IN AUTO. CLIMBED TO 10000 BEFORE TURNING BACK.