NTSB Identification: CHI96IA066.
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Scheduled 14 CFR
Incident occurred Thursday, December 28, 1995 in BEMIDJI, MN
Probable Cause Approval Date: 05/09/1996
Aircraft: Fairchild SA227-AC, registration: N159MC
Injuries: 16 Uninjured.
NTSB investigators used data provided by various sources and may not have traveled in support of this investigation to prepare this aircraft incident report.
On short final, the crew noticed that the airplane had restricted up-elevator movement. They initiated a go-around and used power to control pitch for landing. Excessive descent rate and airspeed resulted in a hard landing. Postincident examination revealed a loose upper elevator stop bolt that had contacted a stringer, preventing further movement of the control column. Sixteen flights earlier, maintenance records show extensive work done to the elevator quadrant. During this work, hardware was 'loosely installed' on the quadrant so as to not be lost. The position of a nut run down on the bolt is close to the appearance of a nut properly torqued.
The National Transportation Safety Board determines the probable cause(s) of this incident to be: inadequate maintenance installation and inspection of the elevator flight control system which led to restricted flight control elevator movement due to a loose bolt. Full narrative available
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