NTSB Identification: FTW86LA039.
The docket is stored on NTSB microfiche number 29965.
Accident occurred Tuesday, January 21, 1986 in BRENHAM, TX
Aircraft: SOCATA MS RALLYE 235C, registration: N355RA
Injuries: 1 Uninjured.

NTSB investigators may not have traveled in support of this investigation and used data provided by various sources to prepare this aircraft accident report.

THE RIGHT FLAP PUSH ROD EXPERIENCED A PROGRESSIVE TYPE FAILURE FROM REPEATED EXCESSIVE FORCE BEING APPLIED BY THE FLAP DRIVE MOTOR. THE EXCESSIVE FORCE WAS CAUSED BY THE FLAP ROLLERS BEING NEGLECTED DURING MAINTENANCE TO THE EXTENT THAT THEY BECAME DRY AND SLID ON THE FLAP TRACK INSTEAD OF ROTATING. THE FLAP TRACK ALSO CONTAINED NOTICABLE WEAR ALTHOUGH THE LAST ANNUAL INSPECTION WAS COMPLETED ONLY THREE MONTHS PRIOR TO THE ACCIDENT. THE AIRCRAFT BECAME UNCONTROLLABLE DUE TO SPLIT FLAPS DURING THE FINAL PORTION OF ITS FINAL APPROACH FOR LANDING. THE AIRCRAFT TOUCHED DOWN BUT WAS VEERING LEFT. IN ORDER TO PREVENT A COLLISION WITH PARKED AIRCRAFT THE PILOT ADVANCED THE THROTTLE AND BECAME AIRBORNE. AFTER CLEARING THE PARKED AIRCRAFT THE PILOT ATTEMPTED A FORCED LANDING WHICH TERMINATED IN A GROUP OF TREES ON THE EDGE OF THE AIRPORT.

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

FLT CONTROL SYST,WING FLAP CONTROL..FAILURE,TOTAL

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

FLIGHT CONTROL,FLAP..JAMMED


Contributing Factors

OBJECT..TREE(S)


Contributing Factors

MAINTENANCE,ANNUAL INSPECTION..INADEQUATE..OTHER MAINTENANCE PERSONNEL

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