As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LOUD POP & ABNORMAL VIBRATION IN FLIGHT FROM NOSE AREA. FOUND GPU ACCESS DOOR OPEN ON ACFT ARRIVAL. INSPECTED DOOR & SURROUNDING AREA. NO DAMAGE TO FUSELAGE SKIN. GPU DOOR LATCH INOPERATIVE. INSTALLED NEW GPU ACCESS DOOR IAW AMM 52-40-01. OPS CHECKED GOOD CDL RESTORED.