NTSB Identification: SEA86FA066.
The docket is stored on NTSB microfiche number 29944.
Accident occurred Tuesday, February 25, 1986 in ANTELOPE, OR
Aircraft: PIPER PA34-200T, registration: N8305C
Injuries: 2 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.

PLT WAS OPERATING VFR ON TOP AT 11000 FEET, COMMENCED DESCENT TO DESTINATION 34 MILES OUT. PLT RPTED FIELD IN SIGHT 16 MILES OUT, PASSING 6500 FT, CANCELLED FLIGHT PLAN. ACFT IMPACTED RIDGE AT 4100 FEET MSL 7 MILES FROM DESTINATION. DARK NIGHT CONDS EXISTED, WITH OVERCAST ABOVE BROKEN CLOUDS. RESIDENTS REPORTED MODERATE DRIZZLE IN AREA AT TIME OF CRASH. FORECAST INCLUDED MODERATE TURBULENCE BELOW 15000 FEET WITH STRONG UP AND DOWN DRAFTS NEAR MOUNTAINS, MOUNTAINS OBSCURED IN CLOUDS AND PRECIPITATION. RADAR TRACK SHOWED ACFT SPD DURING DESCENT IN EXCESS OF 200 KTS, RATE OF DESCENT UP TO 1200 FEET PER MINUTE. WRECKAGE INDICATES ACFT STRUCK STEEP ROCKY SLOPE IN NOSE-HIGH ATTITUDE WITH POWER ON.

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

ALTITUDE..MISJUDGED..PILOT IN COMMAND

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

CLEARANCE..MISJUDGED..PILOT IN COMMAND


Contributing Factors

TERRAIN CONDITION..RISING


Contributing Factors

LIGHT CONDITION..DARK NIGHT


Contributing Factors

WEATHER CONDITION..RAIN


Contributing Factors

WEATHER CONDITION..TURBULENCE


Contributing Factors

WEATHER CONDITION..DOWNDRAFT

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