NTSB Identification: LAX87FA087.
The docket is stored on NTSB microfiche number 36632.
Nonscheduled 14 CFR
Accident occurred Friday, January 16, 1987 in CIMA, CA
Probable Cause Approval Date: 04/24/1989
Aircraft: CESSNA 208, registration: N9613F
Injuries: 1 Fatal.

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 A DAY/VFR FLT FROM ONTARIO, CA TO LAS VEGAS, NV, THE ACFT COLLIDED WITH MOUNTAINOUS TERRAIN NEAR THE TOP OF A 6500' PEAK. RADAR DATA SHOWED THAT APRX 20 MIN BEFORE THE ACDNT, THE ACFT BEGAN A GRADUAL DSCNT FROM ABOUT 10,000'. NO PREIMPACT PART FAILURE OR MALFUNCTION OF THE ACFT, ENG OR AUTOPLT WAS FOUND. THE PLT HAD A REST PERIOD ON THE PREVIOUS DAY, BUT THE INVESTIGATION DID NOT DETERMINE WHETHER HE HAD OBTAINED ANY SLEEP BEFORE A 1700 PST FLT. AFTER THE 1700 PST FLT, HE VOLUNTARILY FLEW ON A LATE NIGHT FLT WITH ANOTHER COMPANY. THAT FLT WAS DELAYED IN RETURNING & DID NOT LAND AT ONTARIO UNTIL ABOUT 0500 PST THE NEXT MORNING. APRX 41 MIN LATER, THE PLT TOOK OFF ON THE ACDNT FLT.

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

ALTITUDE..NOT MAINTAINED..PILOT IN COMMAND

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

DESCENT..INADVERTENT..PILOT IN COMMAND

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

FATIGUE(LACK OF SLEEP)..PILOT IN COMMAND


Contributing Factors

TERRAIN CONDITION..MOUNTAINOUS/HILLY

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