NTSB Identification: LAX82FA040
14 CFR Part 91: General Aviation
Accident occurred Sunday, January 03, 1982 in 10 NM W LEE VIN, CA
Probable Cause Approval Date: 01/03/1983
Aircraft: GRUMMAN AA-5B, registration: N28912
Injuries: 2 Fatal,1 Serious.

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.

WHILE ON THE GROUND THE PILOT WAS REFUSED A ROUTE OVER THE SIERRA MOUNTAINS, AFTER DEPARTURE THE PILOT REQUESTED AND WAS GIVEN A CHANGE IN HIS FLIGHT PLAN THAT CLEARED HIM OVER THE MOUNTAINS. AT 1654 THE PILOT ADVISED OAKLAND CENTER THAT HE WAS CLIMBING THROUGH 14300 MSL. THE MEA WAS 15100 MSL. AT 1712 THE PILOT STATED HE HAD ENCOUNTERED STRONG UP AND DOWNDRAFTS BUT WAS VFR. JUST BEFORE CENTER LOST RADAR CONTACT THE PILOT ADVISED HE WAS BELOW MEA. THE AIRCRAFT WAS LOCATED 5 DAYS LATER CLOSE TO THE TOP OF A 12590 FOOT MOUNTAIN.

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

IN-FLIGHT PLANNING/DECISION..IMPROPER..PILOT IN COMMAND

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

FLIGHT INTO KNOWN ADVERSE WEATHER..ATTEMPTED..PILOT IN COMMAND


Contributing Factors

TERRAIN CONDITION..HIGH TERRAIN


Contributing Factors

WEATHER CONDITION..DOWNDRAFT


Contributing Factors

TERRAIN CONDITION..SNOW COVERED

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