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Accidents · NTSB FTW90LA029 · Final report

Cessna 172 accident near Port Allen, Louisiana, November 20, 1989

On November 20, 1989 at about 8:30 pm local time, a Cessna 172, registered N13055, was substantially damaged in an accident near Port Allen, Louisiana. It was an aerial observation 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

FUEL SYSTEM CONTAMINATION DUE TO INADEQUATE MAINTENANCE/SERVICE OF THE AIRPLANE.

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

What the record shows

Date
November 20, 1989 · about 8:30 pm local time
Place
Port Allen, Louisiana · map
Type
Accident
Injuries
No one was hurt; 1 person was on board or involved.
Weather
visual conditions (good weather)
Aircraft
Cessna 172 · all 172s on the register
Registration
N13055 · no longer on the register · serial 17262462
Damage
Substantial damage
Flight
Aerial observation flight · general aviation rules (Part 91)

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

THE AIRPLANE WAS BEING USED FOR PIPELINE PATROL. DURING THE FLIGHT, THE ENGINE RAN ROUGH TWICE AND TWICE THE COMMERCIAL PILOT MADE OFF AIRPORT LANDINGS TO DRAIN THE SUMPS IN THE FUEL SYSTEM. SHORTLY AFTER THE NEXT TAKEOFF, THE ENGINE QUIT AND THE PILOT HAD TO MAKE A FORCED LANDING IN A ROUGH SUGAR-CANE FIELD. POST ACCIDENT INVESTIGATION REVEALED THAT THE AIRPLANE HAD PREVIOUSLY BEEN OUT OF SERVICE FOR THREE YEARS. THE MAINENANCE PERSONNEL THAT RETURNED THE AIRPLANE TO SERVICE, STATED THEY HAD USED THE MAINTENANCE MANUAL TO REMOVE THE AIRPLANE FROM STORAGE, AND BACK TO SERVICE. INVESTIGATION INDICATED ALL PARTS OF THE FUEL SYSTEM WERE COVERED WITH A RUST COLORED, VARNISH LIKE SUBSTANCE.

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
  • Ratings: single-engine land
  • Flight time: 6,859 hours in all; 4,500 in this make and model; 240 in the last 90 days; 80 in the last 30 days; 6,729 as pilot in command
  • Medical certificate: Class 2 (valid medical--no waivers/lim.)
  • Seat: left

The aircraft

  • Last inspection: annual inspection
  • Maximum gross weight: 2,300 lb
  • Seats: 4
  • Landing gear: fixed
  • Engine: Lycoming O-320-E2D (piston); 0 hours total

The flight

  • Destination: Gonzales LA
  • Flight plan: none
  • Runway 0

Weather at the time

  • Light: daylight
  • Visibility: 7 statute miles
  • Sky: clear
  • Temperature: 70°F (21°C), dew point 63°F (17°C)

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.