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Last updated: 12 June 2021
Status:Definitief
Datum:vrijdag 2 januari 1998
Tijd:15:26
Type:Silhouette image of generic DC6 model; specific model in this crash may look slightly different
Douglas DC-6B
Luchtvaartmaatschappij:Woods Air Fuel
Registratie: N861TA
Constructienummer: 43522/229
Bouwjaar: 1952
Aantal vlieguren:46626
Motoren: 4 Pratt & Whitney R-2800-CB16
Bemanning:slachtoffers: 0 / inzittenden: 3
Passagiers:slachtoffers: 0 / inzittenden: 0
Totaal:slachtoffers: 0 / inzittenden: 3
Schade: Vernield
Gevolgen: Written off (damaged beyond repair)
Plaats:Nixon Fork Mine, AK (   Verenigde Staten)
Fase: Start (TOF)
Soort vlucht:Vracht
Vliegveld van vertrek:Nixon Fork Mine, AK, Verenigde Staten
Vliegveld van aankomst:Palmer Municipal Airport, AK (PAQ/PAAQ), Verenigde Staten
Beschrijving:
At an indicated airspeed of 45 knots during the takeoff roll, ice formed between the inner and outer windshield panes, with the icing following the flow of heated air through the windshield. The crew's forward visibility was obscured, and the takeoff was aborted. The captain reported that the airplane drifted left into snow berms on the side of the 4200 feet long by 85 feet wide runway and caught fire.
The "DC-6 Airplane Operating Manual" used by two other companies states "...Certain combinations of temperature and humidity will cause moisture to condense from the air between the windshield panels and settle on the inner surfaces of the glass, obscuring vision. Once formed, anti-icing airflow with heater operation will be required to clear the panels." This language was not included in the Supplemental Type Certificate (STC) literature, nor in the flight handbook for the company operating the accident airplane.

Probable Cause:

PROBABLE CAUSE: "The ingestion of snow into the windshield anti-ice system, and the resulting obscured windshield which made runway alignment not possible. Factors associated with this accident were the cold windshield, the reduced performance of the windshield anti-ice because of the short taxi by the crew, and the insufficient information on the system provided by the manufacturer."

Accident investigation:
cover
Investigating agency: NTSB
Status: Investigation completed
Duration: 3 years and 2 months
Accident number: ANC98LA014
Download report: Summary report

Bronnen:
» ICAO Adrep Summary 6/98 (#47)


Foto's

photo of Douglas-DC-6B-N861TA
accident date: 02-01-1998
type: Douglas DC-6B
registration: N861TA
photo of Douglas-DC-6B-N861TA
accident date: 02-01-1998
type: Douglas DC-6B
registration: N861TA
 

Kaart
Deze kaart geeft het vliegveld van vetrek weer en de geplande bestemming van de vlucht. De lijn tussen de vliegvelden geeft niet de exacte vliegroute weer.
De afstand tussen Nixon Fork Mine, AK en Palmer Municipal Airport, AK bedraagt 341 km (213 miles).

This information is not presented as the Flight Safety Foundation or the Aviation Safety Network’s opinion as to the cause of the accident. It is preliminary and is based on the facts as they are known at this time.
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