As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: VENT SKIN VALVE FAULT "OUTLET VALVE OPEN" VENT BLOWER FAULT JUST AFTER TAKEOFF. AIRCRAFT RETURNED TO LAX WHERE IT LANDED SAFELY WITHOUT FURTHER INCIDENT. (NO EMERGENCY WAS DECLARED) REPLACED SKIN AIR OUTLET VALVE AND ACCOMPLISHED A SATISFACTORY OPERATIONAL CHECK PER AMM 21-26-00-710-001-A.