NTSB Identification: LAX86FA279.
The docket is stored on NTSB microfiche number 32867.
Accident occurred Sunday, July 06, 1986 in HAVASU LAKE, CA
Probable Cause Approval Date: 03/07/1988
Aircraft: CESSNA 172M, registration: N80503
Injuries: 5 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.

AT ABOUT 2100 PDT ON 7/5/86, THE FLT DEPARTED LAKE HAVASU CITY, AZ FOR AN UNKN DESTN. ON THE NEXT MORNING AT APRX 0330, WITNESSES, WHO WERE FISHING ON LAKE HAVASU, HEARD THE ACFT CIRCLE TWICE, THEN CRASH ABOUT 2 MI WEST OF THE ARPT ON THE CALIFORNIA SIDE OF THE LAKE. THE WX WAS CLEAR & IT WAS A DARK NIGHT. THERE WAS EVIDENCE THE ACFT IMPACTED IN A STEEP DSCNT; IT MOVED ONLY ABOUT 20' AFTER IMPACT & THERE WAS EXTENSIVE DAMAGE TO THE NOSE & FWD FUSELAGE. NO PREIMPACT PART FAILURE/MALFUNCTION WAS FND. TOXICOLOGY TESTS OF THE PLT & 2 OF THE PAX WERE POSITIVE FOR BENZOYLECGONINE & COCAINE. FOR BENZOYLECGONINE, THE PLT'S BLOOD, LIVER & KIDNEY TISSUE TESTED 0.46 MICROGRAM/MILLILITER, 0.58 MICROGRAM/GRAM & 1.3 MICROGRAMS/GRAM, RESPECTIVELY. FOR COCAINE, HIS LIVER & KIDNEY TISSUE TESTED 0.01 & 0.23 MICROGRAM/GRAM, RESPECTIVE-LY. THE PLT POSSESSED A STUDENT LICENSE THAT HAD EXPIRED. THREE OF THE 4 PAX WERE OCCUPYING THE 2 REAR SEATS.

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

AIRCRAFT HANDLING..NOT MAINTAINED..PILOT IN COMMAND


Contributing Factors

PROCEDURES/DIRECTIVES..NOT FOLLOWED..PILOT IN COMMAND


Contributing Factors

IMPAIRMENT(DRUGS)..PILOT IN COMMAND


Contributing Factors

QUALIFICATION..PILOT IN COMMAND


Contributing Factors

LIGHT CONDITION..DARK NIGHT


Contributing Factors

VISUAL/AURAL PERCEPTION..PILOT IN COMMAND


Contributing Factors

SPATIAL DISORIENTATION..PILOT IN COMMAND

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