The U.S. aircraft register, updated daily
Accidents · NTSB SEA87LA006 · Preliminary: the investigation is not finished

Piper PA-18-150 accident near Petersburg, Alaska, October 8, 1986

On October 8, 1986 at about 11:00 pm local time, a Piper PA-18-150, registered N6191D, was substantially damaged in an accident near Petersburg, Alaska. It was a personal flight under general aviation rules (Part 91). No one was hurt; 1 person was on board or involved. 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
October 8, 1986 · about 11:00 pm local time
Place
Petersburg, Alaska · map
Type
Accident
Injuries
No one was hurt; 1 person was on board or involved.
Weather
visual conditions (good weather)
Aircraft
Piper PA-18-150 · all PA-18-150s on the register
Registration
N6191D · registry record · serial 18-5485
Damage
Substantial damage
Flight
Personal flight · general aviation rules (Part 91)

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

THE PLT REPORTED THAT WHILE LANDING ON A RIVER THE ACFT SKIDDED ON RIVER SILT. HE STATED HE COULD NOT STOP THE ACFT WHICH TRAVELED TO THE FAR END OF THE RIVER INTO 8 INCH DEEP WATER WHERE IT NOSED OVER.

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: private
  • Ratings: single-engine land; single-engine sea
  • Flight time: 363 hours in all; 284 in this make and model
  • Medical certificate: Class 3 (valid medical--no waivers/lim.)
  • Seat: frt

The aircraft

  • Airframe total time: 334 hours
  • Last inspection: annual inspection
  • Maximum gross weight: 1,760 lb
  • Seats: 2
  • Landing gear: fixed
  • Engine: Lycoming O-320-A2A (piston); 0 hours total

The flight

  • Departed from: PSG Petersburg AK at 6:00 pm
  • Destination: Petersburg AK
  • Flight plan: VFR
  • Runway 0

Weather at the time

  • Light: daylight
  • Wind: from 220° at 10 knots
  • Visibility: 15 statute miles
  • Sky: overcast at 1,200 ft; not recorded at 1,200 ft
  • Temperature: 48°F (9°C), dew point 0°F (-18°C)
  • Observation at 6:00 pm from PST, 15 miles away

Injuries

FatalSeriousMinorNone
Crew1

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.