What was found
VERY NOTICEABLE RUMBLE AND VIBRATION COMING FROM NOSE AREA DURING CLIMB-OUT. ALTITUDE 12,000 TO 13,000 FT ASL, GEAR UP. LASTED APPROXIMATELY 30 SECONDS THEN DISAPPEARED. VIBRATION FELT THROUGH FLOOR AREA IN COCKPIT. FOUND BELLY FAIRING LOOSE. RESEALED IAW AMM 52-82-01, REF LOG PAGE 152396/4 FOR SEALING. ALSO REF 152397/2 AND 3 FOR RESIDUE REMOVAL AND ENGINE RUN. (M)