As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LOUD NOISE FROM NLG AREA FLY BY TOWER SHOWED NLG DOOR OPEN. UNSURE OF NLG POSITION. FLIGHT WAS AT 310K WHEN NOISE ORIGINATED. HISTORY: NO FACT 25APR23 16:38 MDT R&R NLG DOOR SOLENOID VALVE OPS CHECK GOOD. OK FOR SERVICE. REF AMM 32-33-02.......NOTE: FAULT DUPLICATED ON GROUND MULTIPLE TIMES AND ONCE REPAIRED. OPS CHECK GOOD MULTIPLE TIMES