Serious incident Cessna 402B N402PB, Saturday 29 December 1984

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Date:	Saturday 29 December 1984
Time:	16:26 LT
Type:	Cessna 402B
Owner/operator:	Provincetown-boston Airlines
Registration:	N402PB
MSN:	402BO245
Total airframe hrs:	7752 hours
Engine model:	Continental TSIO-520-E
Fatalities:	Fatalities: 0 / Occupants: 1
Other fatalities:	0
Aircraft damage:	Minor
Category:	Serious incident
Location:	Sanford, FL - United States of America
Phase:	En route
Nature:	Ferry/positioning
Departure airport:	Orlando, FL (KMCO)
Destination airport:	Jacksonville, FL (JAX
Investigating agency:	NTSB
Confidence Rating:	Accident investigation report completed and information captured

Narrative:
DURING CRUISE FLT, THE ACFT SUDDENLY NOSED DOWN & BEGAN VIBRATING. REMEDIAL ACTION WAS TAKEN & AN UNEVENTFUL EMERG LANDING WAS MADE. AN EXAM REVEALED THAT THE BOLT, NUT & COTTER PIN (USED TO ATTACH THE ELEVATOR TRIM CONTROL ROD TO THE ELEVATOR TRIM TAB) WERE MISSING. COMPANY MAINTENANCE RECORDS SHOWED THAT THE MISSING COMPONENTS WERE REMOVED ON 12/28/84 & WERE INSTALLED ON THE MORNING OF THE INCIDENT.

Probable Cause:

Accident investigation: