What was found
VIBRATION FELT IN CLIMB THRU FL210-280, SPEED 300-330. LEFT WING INBOARD MID FLAP FITTING FOR AFT FLAP ATTACHMENT IS BROKEN. LEFT WING INBOARD FLAP AFT FLAP CANOE FAIRING REMOVED. SECURED FAIRING PER MM. RPLC'D FITTING PER SHOP MANUAL. WORK ACCOMPLISHED BY SHOP MECH. REPLACED FITTING PER SHOP MANUAL. WORK ACCOMPLISHED BY SHOP MECH. ACCOMPLISHED INSPECTION OF LEFT WING INBOARD FLAP AFT FLAP OUTBOARD FAIRING. OPS CHECKS GOOD.