NTSB Identification: ANC88FA062.
The docket is stored on NTSB microfiche number 37115.
Accident occurred Friday, May 20, 1988 in ANCHORAGE, AK
Probable Cause Approval Date: 10/03/1989
Aircraft: DE HAVILLAND DHC-2, registration: N1435Z
Injuries: 1 Fatal.
NTSB investigators either traveled in support of this investigation or conducted a significant amount of investigative work without any travel, and used data obtained from various sources to prepare this aircraft accident report.
THE AIRPLANE HAD UNDERGONE EXTENSIVE MAINTENANCE WHICH INCLUDED WORK ON THE CONTROL COLUMN. THE UPPER HALF OF THE CONTROL COLUMN WAS REPLACED WITH A THROW-OVER YOKE AND THE AILERON SYSTEM WAS RERIGGED. THE PILOT-IN-COMMAND PICKED UP THE AIRPLANE AFTER IT WAS TIED DOWN OUTSIDE FOR THREE MONTHS. ACCORDING TO A WITNESS, THE AIRPLANE LIFTED OFF THE WATER AND STARTED A LEFT BANK WHICH INCREASED UNTIL THE AIRPLANE STRUCK THE GROUND. POST ACCIDENT EXAMINATION REVEALED THE CONTROL CABLES AT THE BASE OF THE CONTROL COLUMN OPERATED IN REVERSE OF THE DESCRIPTION IN THE MAINTENANCE MANUAL. COMPLETE CONTROL CONTINUITY COULD NOT BE CONCLUDED BECAUSE OF THE EXTENSIVE POST IMPACT FIRE WHICH DESTROYED THE OVERHEAD BELLCRANK, PULLEY, AND INTERCONNECT SYSTEM.
The National Transportation Safety Board determines the probable cause(s) of this accident to be:FLT CONTROL SYST,AILERON CONTROL..INCORRECT
The National Transportation Safety Board determines the probable cause(s) of this accident to be:MAINTENANCE,MAJOR REPAIR..IMPROPER..OTHER MAINTENANCE PERSONNEL
The National Transportation Safety Board determines the probable cause(s) of this accident to be:AIRCRAFT PREFLIGHT..INADEQUATE..PILOT IN COMMAND
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