Accident Swearingen SA227-AC Metro III N165SW, Sunday 5 January 1997
ASN logo
 

Date:Sunday 5 January 1997
Time:12:43
Type:Silhouette image of generic SW4 model; specific model in this crash may look slightly different    
Swearingen SA227-AC Metro III
Owner/operator:Skylink Charter
Registration: N165SW
MSN: AC-514
Year of manufacture:1982
Total airframe hrs:25111 hours
Engine model:Garrett TPE331-11U-612
Fatalities:Fatalities: 0 / Occupants: 21
Other fatalities:0
Aircraft damage: Destroyed, written off
Category:Accident
Location:Bullhead City, AZ -   United States of America
Phase: Approach
Nature:Passenger - Non-Scheduled/charter/Air Taxi
Departure airport:Long Beach Municipal Airport, CA (LGB/KLGB)
Destination airport:Grand Canyon-National Park Airport, AZ (GCN/KGCN)
Investigating agency: NTSB
Confidence Rating: Accident investigation report completed and information captured
Narrative:
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: "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
Report number: LAX97FA082
Status: Investigation completed
Duration: 1 year and 2 months
Download report: Final report

Sources:

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

History of this aircraft

Other occurrences involving this aircraft

10 January 1987 N165SW Sky West Airlines 0 Yuma, AZ sub

Revision history:

Date/timeContributorUpdates

The Aviation Safety Network is an exclusive service provided by:
Quick Links:

CONNECT WITH US: FSF on social media FSF Facebook FSF Twitter FSF Youtube FSF LinkedIn FSF Instagram

©2024 Flight Safety Foundation

1920 Ballenger Av, 4th Fl.
Alexandria, Virginia 22314
www.FlightSafety.org