NTSB Identification: SEA86FA100.
The docket is stored on NTSB microfiche number 30713.
Accident occurred Thursday, April 10, 1986 in LONE PINE, ID
Aircraft: PIPER PA-28R-180, registration: N3714T
Injuries: 3 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.

AFTER AN INITIAL WEATHER BRIEFING THE PLT DEPARTED COEUR DALENE, IDAHO, FOR HIS DESTINATION OF IDAHO FALLS, IDAHO, WITH A PLANNED PASSENGER PICKUP AT MISSOULA, MONTANA. DURING THE SECOND LEG OF THE FLT HE MISNAVIGATED WHILE AVOIDING WEATHER WHICH RESULTED IN AN UNPLANNED FUEL STOP AT LEWISTON, IDAHO AND A 3 HR DELAY FOR THE OCCUPANTS WHO PLANNED TO ATTEND A POLITICAL FUNCTION. THERE WAS NO EVIDENCE OF HIS OBTAINING AN UPDATED WEATHER BRIEFING AFTER THE INITIAL WEATHER BRIEFING. WHILE ENROUTE TO IDAHO FALLS THE ACFT ENCOUNTERED WEATHER CONDITIONS WHICH RESULTED IN THE PLT REQUESTING INSTRUMENT HANDLING. SHORTLY AFTER THE REQUEST THE ACFT COLLIDED WITH UPSLOPING TERRAIN IN A MOUNTAINOUS AREA. DARK NIGHT CONDITIONS EXISTED DURING BOTH THE WEATHER ENCOUNTER AND SUBSEQUENT COLLISION.

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

WEATHER EVALUATION..MISJUDGED..PILOT IN COMMAND

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

CLEARANCE..NOT MAINTAINED..PILOT IN COMMAND


Contributing Factors

LIGHT CONDITION..DARK NIGHT


Contributing Factors

BECAME LOST/DISORIENTED..PILOT IN COMMAND


Contributing Factors

TERRAIN CONDITION..MOUNTAINOUS/HILLY


Contributing Factors

WEATHER CONDITION..RAIN


Contributing Factors

PREFLIGHT PLANNING/PREPARATION..INADEQUATE..PILOT IN COMMAND


Contributing Factors

PRESSURE..PILOT IN COMMAND

Index for Apr1986 | Index of months