As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING TAKEOFF VENT SKIN VAVLE FAULT DURING CLIMB OUT AIRCRAFT WOULD NOT PRESSURIZE. OUTLET VALVE INDICATED FULL OPEN. MAX CABIN ALT 8000-REMOVED SKIN AIR OUTLET V 22HQ IAW AMM 21-26-53-000-002. INSTALLED SKIN AIR OUTLET 22HQ IAW 21-26-53. R&R BLOWER FAN IAW AMM 21-26-51 (20HQ). OPS CHECK AVEC TEST OK. A/C PRESSURIZATION TEST GOOD IAW AMM 05-53-00. A/C OK FOR SERVICE. THIS CLEARS MDDR 71006. PLACARDS REMOVED.