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Last updated: 30 November 2020
Status:Definitief
Datum:zondag 5 januari 1997
Tijd:12:43 MST
Type:Silhouette image of generic SW4 model; specific model in this crash may look slightly different
Swearingen SA227-AC Metro III
Luchtvaartmaatschappij:Skylink Charter
Registratie: N165SW
Constructienummer: AC-514
Bouwjaar: 1982
Aantal vlieguren:25111
Motoren: 2 Garrett TPE331-11U-612
Bemanning:slachtoffers: 0 / inzittenden: 2
Passagiers:slachtoffers: 0 / inzittenden: 19
Totaal:slachtoffers: 0 / inzittenden: 21
Schade: Vernield
Gevolgen: Written off (damaged beyond repair)
Plaats:Bullhead City, AZ (   Verenigde Staten)
Fase: Nadering (APR)
Soort vlucht:Binnenlandse charter
Vliegveld van vertrek:Long Beach Municipal Airport, CA (LGB/KLGB), Verenigde Staten
Vliegveld van aankomst:Grand Canyon-National Park Airport, AZ (GCN/KGCN), Verenigde Staten
Beschrijving:
Instrument meteorological conditions prevailed at the destination Grand Canyon and the aircraft was cleared for a localizer instrument approach. The weather was below landing minimums and the pilot executed a missed approach. He then diverted to the company designated alternate airport at Bullhead City. The aircraft was 6.5 miles out on final approach for Bullhead City runway 34 when both engines lost power. A forced landing was carried out in a dry wash. The gear collapsed and the aircraft skidded 100 feet before coming to rest near Highway 95.
The aircraft had probably encountered weather conditions causing light to moderate rime icing. Ice from the unheated propeller spinner dome, which is difficult to detect or discern visually, was possibly shed into the engine inlets after descent into warmer air during the approach phase. The ice ingestion disturbs the air flow which then causes the flameout when the ignition is not on.

Probable Cause:

PROBABLE CAUSE: "Failure of the pilot(s) to use 'override' ignition as prescribed by checklist procedures during an encounter with icing conditions, which subsequently led to ice ingestion and dual engine flame-outs. Factors related to the accident were: the adverse weather (icing) conditions, the accumulation of airframe/engine ice, and lack of suitable terrain in the emergency landing area. "

Accident investigation:
cover
Investigating agency: NTSB
Status: Investigation completed
Duration: 1 year and 3 months
Accident number: LAX97FA082
Download report: Summary report

Bronnen:
» Air Safety Week 3 February 1997
» NTSB Identification: LAX97FA082
» Ice Ingestion Causes Both Engines to Flame Out During Air-taxi Turboprop’s Final Approach


Veiligheidsmaatregelen

NTSB issued 2 Safety Recommendations

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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 Long Beach Municipal Airport, CA en Grand Canyon-National Park Airport, AZ bedraagt 593 km (371 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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