NTSB Identification: LAX82FUD04
14 CFR Part 91: General Aviation
Accident occurred Friday, August 13, 1982 in HAWTHORNE, CA
Probable Cause Approval Date: 08/13/1983
Aircraft: PIPER PA-28R-201, registration: N9342C
Injuries: 1 Uninjured.

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 ACFT CRASHED ON FINAL APPROACH AFTER THE ENGINE LOST POWER. THE PLT STATED THAT ON FINAL THE ENGINE BACKFIRED, LOST POWER AND WOULD NOT RESPOND TO THROTTLE MOVEMENT. THE ENGINE HAD BEEN THE SUBJECT OF PREVIOUS WRITE-UPS & WORK ORDERS, WHICH INCLUDED FUEL PRESSURE FLUCTUATION, ROUGH ENGINE, BAD FUEL PUMP, ENGINE DIES AT IDLE AND RICH MIXTURE. ON THE DAY OF THE ACCCIDENT THE FUEL INJECTION UNIT WAS REMOVED FOR OVERHAUL AND REPLACED. DURING POST ACCIDENT TESTING THE ENGINE RAN BUT BECAME EXCESSIVELY RICH. MANUAL LEAN GAVE A SIGNIFICANT RISE IN RPM. LATER TESTING OF THE FUEL INJECTION SYSTEM REVEALED THE UNIT OPERATED ERRATICALLY AND WAS RICH AT LOWER PRESSURES.

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

FUEL SYSTEM,INJECTOR..IMPROPER

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

FLUID,FUEL..ERRATIC

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