As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
INFLIGHT PASSING 15KALT. VENT SKIN VALVEFAULT AFTER CLEARED LP 8464315 REVERSED MEL 2126AB REACTIVATED INLET SKIN VALVE PERFORMED OPERATIONAL SYS TEST THRU MCDU REF. AMM 21-26-00-710-001-A TEST OK. REF LP-8464315 RPL''D EXTRACT FAN ROTABLE PARTS CHANGE WAS INDICATED - TT # 1339728 SN OFF 4656 FAN, AVIONICS FAN OFF 31-2126-9-9004 4656 ON 31-2126-9-9004 4845