NTSB Identification: ANC82FA091
Nonscheduled 14 CFR Part 135: Air Taxi & Commuter
Accident occurred Friday, September 17, 1982 in NEAR NONDALTON, AK
Probable Cause Approval Date: 09/17/1983
Aircraft: ROBERTSON C-U206F, registration: N33249
Injuries: 4 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.

SHORTLY AFTER TAKEOFF FROM HUDSON LAKE THE LEFT WINGTIP CONTACTED THE WATER CAUSING THE ACFT TO CARTWHEEL. THE ACFT CAME TO REST INVERTED & FLOATED FOR A SHORT TIME BEFORE SINKING. A WITNESS REPORTED THE WAVES ON THE LAKE WERE AT LEAST 4 FT HIGH & BREAKING OVER THE FLOATS, & THE WX WAS THE WORST HE HAS SEEN SINCE ARRIVING IN LATE MAY OF 1982. THE WITNESS REITERATED GALE FORCE WINDS & HEAVY RAIN. HE ALSO STATED THE WAVES IN THE COVE WHERE THE TAKEOFF STARTED WERE OPPOSITE TO THE DIRECTION OF TAKEOFF & THE WAVES WERE NOT A TRUE INDICATION OF THE WIND DIRECTION. THE WAVES WERE ALMOST 90 DEG DIFFERENT THAN THE WAVES IN THE CENTER OF THE LAKE. HE SAID IT WAS DIFFICULT TO TELL WHEN THE ACFT GOT ON STEP BECAUSE IT WAS BOUNCING AROUND BADLY & THE WATER WAS HITTING THE STRUTS. THE ONLY PERSON HE COULD SEE WEARING ANY FLOTATION DEVICE WAS THE PLT. ALL THE LIFE VESTS WERE LOCATED UNDER EACH PASSENGER SEAT SECURED IN A POUCH BY METAL TWISTS FASTENERS.

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

JUDGMENT..POOR..PILOT IN COMMAND


Contributing Factors

WEATHER CONDITION..CROSSWIND


Contributing Factors

WEATHER CONDITION..GUSTS


Contributing Factors

WEATHER CONDITION..HIGH WIND


Contributing Factors

WEATHER CONDITION..RAIN


Contributing Factors

WEATHER CONDITION..TURBULENCE


Contributing Factors

WEATHER CONDITION..UNFAVORABLE WIND


Contributing Factors

WEATHER CONDITION..WINDSHEAR


Contributing Factors

TERRAIN CONDITION..WATER,ROUGH


Contributing Factors

PASSENGER BRIEFING..NOT PERFORMED..PILOT IN COMMAND


Contributing Factors

EMERGENCY EQUIPMENT..NOT USED..PASSENGER

Index for Sep1982 | Index of months