As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NR 2 ENGINE O/B TVBC AIR VALVE POPOUT INDICATOR IN THE CLOSE POSITION. FOUND VALVE BINDING IN CLOSED POSITION. FREED UP VALVE, VALVE OPENS AND CLOSES COMPLETELY. PERFORMED OPERATIONAL CHECK. INDICATOR PIN IN THE EXTENDED POSITION INDICATING VALVE IS NOW OPEN.