NTSB Identification: DEN90LA123.
The docket is stored on NTSB microfiche number 41632.
Accident occurred Monday, June 04, 1990 in DOUGLAS, WY
Probable Cause Approval Date: 09/15/1992
Aircraft: PIPER PA-18-150, registration: N4720A
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 AIRPLANE HAD BEEN COMPLETELY RECOVERED WITH NEW FABRIC AND THE PILOT WAS GOING TO FERRY IT BACK TO HIS RANCH. WITNESSES SAID THE PILOT DID NOT PERFORM A PREFLIGHT CHECK. THE AIRPLANE TOOK OFF, CLIMBED TO AN ALTITUDE OF 15 TO 30 FEET, THEN BANKED STEEPLY TO THE RIGHT AND CRASHED. EXAMINATION OF THE FLIGHT CONTROL SYSTEM DISCLOSED THE AILERON CONTROL CABLES HAD BEEN INADVERTENTLY CROSSED DURING REASSEMBLY.

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

THE ACCIDENT TO BE IMPROPER INSTALLATION OF AILERON CONTROL SYSTEM BY MAINTENANCE PERSONNEL, AND FAILURE TO PERFORM AN AIRCRAFT PREFLIGHT BY THE PILOT IN COMMAND.

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