NTSB Identification: LAX83FUG11.
The docket is stored on NTSB microfiche number 20232.
Accident occurred Saturday, January 01, 1983 in UPLAND, CA
Aircraft: PIPER PA-28R-200, registration: N3084R
Injuries: 2 Minor.

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 AIRCRAFT CRASHED 150 YARDS SHORT OF THE RUNWAY DURING LANDING. THE PILOT SAID THE MANIFOLD PRESSURE KEPT FALLING AS HE PROGRESSED AROUND THE FIELD IN THE TRAFFIC PATTERN. THE ENGINE WENT TO IDLE ON THE BASE LEG. THE PILOT HAD LOWERED THE GEAR BUT NOT THE FLAPS. WHEN IT BECAME APPARENT THE RUNWAY WOULD NOT BE REACHED HE PICKED A LANDING SPOT AND LOWERED THE FLAPS. THE ROUGH AREA OF LANDING TORE OFF THE LANDING GEAR AND SLOWED THE AIRCRAFT. INSPECTION SHOWED THAT THE THROTTLE CONTROL SPRING STUD ASSEMBLY NUT WAS MISSING WITH THE STUD DETACHED FROM THE THROTTLE. THE STUD WAS PLACED IN POSITION ON THE THROTTLE ARM AND FELL AWAY AFTER ABOUT 15 CYCLES OF THROTTLE ACTUATION FROM THE COCKPIT. THE ENGINE HAD JUST BEEN OVERHAULED AND INSTALLED, AND AN ANNUAL INSPECTION HAD BEEN PERFORMED ON DECEMBER 11, 1982. TOTAL TIME SINCE WAS ABOUT 10 HOURS.

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

THROTTLE/POWER LEVER,LINKAGE..DISCONNECTED

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

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


Contributing Factors

TERRAIN CONDITION..ROUGH/UNEVEN




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