What was found
AIRCRAFT WAS GNDED. SUDDEN STRONG & RAPID VERTICAL AIRFRAME VIBE DURING CLIMB AT FL 250 M, .78 335 KIAS AT 25C SAT, STOPPED WHEN SLOW < 300K. REPLACED LT ELEVATOR HINGE, NR 3 FITTING. ACCOMPLISHED A SATISFACTORY OPERATIONAL CHECK. SEE AALA201512309008 FOR ADDITIONAL INFORMATION.