What was found
CLIMING OUT, PASSING 15,000' RECEIVED VIBRATION IN AIRFRAME THAT BEGAN GRADUAL AND INCREASED WITH INCREASE IN AIRSPEED. VIBRATION SEEMED TO BE AT PILOTS POSITION OR FWD. VIBATION DECREASED WITH RECREASE IN AIRSPEED. IT WAS GONE AT 250 KTS AND BELOW. ACFT IAW MM 05-50-00 NO FAULTS NOTED. ACFT OK FOR SERVICE. COMPLIED WITH PART NR1 OF EA 6-5240-144178 TAPED DOOR. REMOVED FUEL SERVICE PANEL, FOR COMPOSITE REPAIR AND PUT IN SHIPPING BOX WITH NEW COOLING AIR INLET FAIRING, TO PAINT AND FAB AT COMPOSITE SHOP. DURING VIBRATION INSPECTION FOUND FUEL SER VICE DOOR HANGING DOWN .THIS WAS CAUSE OF VIBRATION ITEMWAS DEFERRED W/ E,A, 6-5240-144178A WRI 52-40 3526 SHOWS THE REPAIR & REPLACEMENT OF DOOR WHICH CAUSED THE VIBRATION.