As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORT: RUMBLING NOISE AND MILD VIBRATION IN LOWER NOSE AREA OF A-C. NOTICED RIGHT AFTER T-O. SAMC TEXT: CHECK NOSE GEAR DOORS AND SEALS FOR CONDITION AND SECURITY. CHECK RADOME SEAL, E AND E DOOR SEALS. CHECK DUCTING IN E AND E COMPARTMENTS AND NOSE AREA FOR LOOSENESS AND SECURITY. NOTE AVIONICS FANS FOR PROPER OPERATION. REPLACED RECIRCULATION DUCT, OPS OKAY.