What was found
FLT#1267, HPN-PBI. 'DURING CRUISE- INFLIGHT REPORTED A NOISE OR VIBRATION FROM LEFT SIDE MID-WING. SLOWED TO .77 MACH AND NOISE DISSAPPEARED. INOP SPOILER WITH MEL-NO AIRCRAFT ABNORMALITIES. VIBRATION FORM COMPLETED; PERFORMED GVI OF LH SPOILER # 1 WITH FLAPS EXTENDED, FOUND SPLR # 1 INCORRECTLY DEACTIVATED PER MEL, ELECT CONNECTOR LOOSE. CAPPED AND SECURRED ELECT CONNECTOR AS PER MEL PROCEDURE. REF AMM 27-64-00-040-001. NO OTHER DEFECTS FOUND. A/C OK TO CONT.'