NTSB Identification: LAX83FVA01
14 CFR Part 137: Agricultural
Accident occurred Thursday, October 14, 1982 in NEAR BAKERSFIEL, CA
Probable Cause Approval Date: 10/14/1983
Aircraft: EAGLE DW-1, registration: N88126
Injuries: 1 Serious.

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.

DURING A TURN-AROUND WHILE SPRAYING A COTTON FIELD, THE AIRCRAFT STARTED ROLLING TO THE LEFT AND THE PILOT COULD NOT STOP IT. HE STATED THE LEFT SPOILER REMAINED DEPLOYED AND WOULD NOT CLOSE. HE FOUGHT THE ROLL UNTIL IT IMPACTED WITH THE GROUND. THE LEFT SPOILER WAS FOUND IN THE VERTICAL POSITION AND THE RIGHT SPOILER WAS FLUSH WITH THE WING SURFACE. DUE TO POOR ROLL RATE AND HIGH ASPECT RATIO, SPOILERS HAD BEEN ADDED TO THE LOWER WING. THEY CAN BE INDEPENDENTLY OPERATED FROM THE COCKPIT OR WORK IN CONJUNCTION WITH THE AILERONS. ACCORDING TO AN FAA ENGINEERING TEST PLT, THE SPOILERS HAVE LIMITED AUTHORITY, AND IF ONE IS MANUALLY DEPLOYED TO THE FULL UP POSITION IT CAN BE OVER- RIDDEN WITH OPPOSITE AILERON. THE PLT STATED THAT THIS WAS THE THIRD OR FOURTH TIME A SPOILER HAD STUCK OPEN. THE WING WAS CUT OPEN AND NO REASON FOR THE SPOILERS STICKING COULD BE FOUND.

The National Transportation Safety Board determines the probable cause(s) of this accident to be:

DIVERTED ATTENTION..PILOT IN COMMAND


Contributing Factors

FLT CONTROL SYST,WING SPOILER SYSTEM..MOVEMENT RESTRICTED


Contributing Factors

FLT CONTROL SYST,WING SPOILER SYSTEM..UNDETERMINED


Contributing Factors

SPOILER RETRACTION..NOT POSSIBLE..PILOT IN COMMAND

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