What was found
FLT 2555 - RECEIVED A NOSE DOOR OPEN MASTER WARNING. REPLACED NOSE DOOR SELECTOR VALVE AND CHECK VALVE PER AMM 33-22-20. OPS CHECK GOOD, P/N 750006000, S/N OFF 1640.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
FLT 2555 - RECEIVED A NOSE DOOR OPEN MASTER WARNING. REPLACED NOSE DOOR SELECTOR VALVE AND CHECK VALVE PER AMM 33-22-20. OPS CHECK GOOD, P/N 750006000, S/N OFF 1640.