NTSB Identification: LAX82FUG14
14 CFR Part 91: General Aviation
Accident occurred Thursday, July 15, 1982 in BERMUDA DUNES, CA
Probable Cause Approval Date: 07/15/1983
Aircraft: GRUMMAN AA-5, registration: N7115L
Injuries: 2 Serious,1 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.

IMMEDIATELY AFTER TAKEOFF THE ENG LOST POWER & THE ACFT WAS UNABLE TO MAINTAIN LEVEL FLT. THE ACFT LANDED IN SAND DUNES AND FLIPPED OVER. DURING A SUBSEQUENT ENG RUN IT WAS NOTED THAT THE ENG RAN NORMALLY AT LOW POWER SETTINGS BUT AT TAKEOFF POWER SETTINGS IT DEVELOPED AN APPARENT IGNITION PROBLEM IN THAT THE ENG MISFIRED & SURGED. INSPECTION REVEALED THAT THE RIGHT MAGNETO WAS NOT DEVELOPING SUFFICIENT VOLTAGE OUTPUT. THE RECOMMENDED SERVICE LIFE OF THE MAGNETO IS 900 HOURS & IT APPEARED THIS MAGNETO WAS IN SERVICE FOR 1897 HOURS.

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

IGNITION SYSTEM,MAGNETO..ERRATIC

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

IGNITION SYSTEM,MAGNETO..FAILURE,PARTIAL

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

IGNITION SYSTEM,MAGNETO..OUTPUT LOW


Contributing Factors

MAINTENANCE,REPLACEMENT..NOT PERFORMED..COMPANY MAINTENANCE PERSONNEL


Contributing Factors

TERRAIN CONDITION..LOOSE GRAVEL/SANDY


Contributing Factors

TERRAIN CONDITION..SOFT




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