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Accidents · NTSB SEA86LA242 · Preliminary: the investigation is not finished

Piper PA-28-140 accident near Pomeroy, Washington, September 6, 1986

On September 6, 1986 at about 3:20 pm local time, a Piper PA-28-140, registered N15390, was destroyed in an accident near Pomeroy, Washington. It was a personal flight under general aviation rules (Part 91). 1 person had minor injuries; 1 other was unhurt. The weather was visual conditions (good weather).

The NTSB's probable cause their words, unchanged

The NTSB has not yet published a probable cause for this accident. Investigations usually take one to two years; this page updates when the final report is released.

Source: NTSB aviation accident database, copy made October 5, 2026. Docket and reports at the NTSB.

What the record shows

Date
September 6, 1986 · about 3:20 pm local time
Place
Pomeroy, Washington · map
Type
Accident
Injuries
1 person had minor injuries; 1 other was unhurt.
Weather
visual conditions (good weather)
Aircraft
Piper PA-28-140 · all PA-28-140s on the register
Registration
N15390 · no longer on the register · serial 28-7325056
Damage
Destroyed
Flight
Personal flight · general aviation rules (Part 91)

The NTSB's narrative final · quoted from the NTSB record

THE PILOT WAS FLYING OVER UNFAMILIAR TERRAIN AT A LOW ALTITUDE IN ORDER TO SPOT ELK. THE PILOT ENCOUNTERED STEEP RISING TERRAIN WHICH HIS AIRCRAFT WAS UNABLE TO OUT CLIMB. DENSITY ALTITUDE AT THE TIME OF THE ACCIDENT COMPUTES TO BE APPROXIMATELY 7,500 FEET. DURING A FORCED LANDING ON A CLEARING THE AIRCRAFT'S LEFT WING STRUCK A TREE STUMP AND THE AIRCRAFT FLIPPED INVERTED.

The complete narrative as the NTSB published it. The NTSB's docket holds the report as a PDF and any photographs, statements and other documents from the investigation.

The factual record from the NTSB's investigation tables, in plain English

Pilot

  • Certificate: commercial pilot, military
  • Ratings: multi-engine land; single-engine land; instrument: airplane
  • Flight time: 4,555 hours in all; 20 in this make and model; 8 in the last 90 days
  • Medical certificate: Class 2 (valid medical--no waivers/lim.)
  • Seat: left

The aircraft

  • Airframe total time: 2,783 hours
  • Last inspection: annual inspection, November 2, 1985
  • Maximum gross weight: 2,150 lb
  • Seats: 4
  • Landing gear: fixed
  • Engine: Lycoming O-320-E3D (piston); 0 hours total

The flight

  • Departed from: SFF Spokane WA at 2:15 pm
  • Flight plan: none
  • Runway 0

Weather at the time

  • Light: daylight
  • Visibility: 40 statute miles
  • Sky: scat at 3,000 ft
  • Temperature: 61°F (16°C), dew point 0°F (-18°C)
  • Altimeter: 29.00 inHg

Injuries

FatalSeriousMinorNone
Crew1
Passengers1

Documents from the investigation the NTSB's docket: the evidence folder behind the report

The docket, the folder of records gathered during an investigation (maintenance records, photographs, witness statements, examinations), has not been read from the NTSB for this case yet; the list appears here once it has. Open the docket at the NTSB.

Everything on this page comes from the NTSB's public records. The narrative, probable cause and findings are the NTSB's own words; the coded tables behind the report are written out in plain English, with pilots' ages, home towns and medical details left out. The documents and photographs are the NTSB's docket, shown as the NTSB released them. This site's own text never names anyone involved. A preliminary report can change; the final report usually follows one to two years later, and the page is refreshed when it does.