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Accident
Last updated: 14 December 2017
Status:Definitief
Datum:woensdag 30 mei 1979
Tijd:20:55
Type:Silhouette image of generic DHC6 model; specific model in this crash may look slightly different
de Havilland Canada DHC-6 Twin Otter 200
Luchtvaartmaatschappij:Downeast Airlines
Registratie: N68DE
Constructienummer: 229
Bouwjaar: 1969
Aantal vlieguren:21050
Motoren: 2 Pratt & Whitney Canada PT6A-20
Bemanning:slachtoffers: 2 / inzittenden: 2
Passagiers:slachtoffers: 15 / inzittenden: 16
Totaal:slachtoffers: 17 / inzittenden: 18
Schade: Afgeschreven
Gevolgen: Written off (damaged beyond repair)
Plaats:Rockland, ME (   Verenigde Staten)
Fase: Nadering (APR)
Soort vlucht:Binnenlandse lijnvlucht
Vliegveld van vertrek:Boston-Logan International Airport, MA (BOS/KBOS), Verenigde Staten
Vliegveld van aankomst:Rockland-Knox County Regional Airport, ME (RKD/KRKD), Verenigde Staten
Vluchtnummer: 46
Beschrijving:
Flight 46 departed Boston with a 65-minute delay due to adverse weather encountered on an earlier flight leg that day. Around 20:30 the crew requested weather information for Rockland and 3 alternate airports. Weather at Rockland was indefinite ceiling, 300 feet, sky obscured, visibility 3/4 mile in fog; wind light and variable - conditions deteriorating. Navy Brunswick Approach Control then cleared the flight to descend to 3000 feet at captain's discretion. At 20:42 the flight was cleared to cruise at 3000 feet for a Richmond runway 03 approach. Last radio transmission was when the crew reported inbound from the Sprucehead NDB. The Twin Otter struck trees 80 feet above the ground with its left wing and continued striking trees before coming to rest 1,2 miles SSW of the runway 03 threshold, 340 feet from initial impact. The aircraft fuselage came to rest on its left side with the forward 16 feet-section of the fuselage crushed.

Probable Cause:

PROBABLE CAUSE: "The failure of the flight crew to arrest the aircraft's descent at the minimum descent altitude for the non-precision approach, without the runway environment in sight, for unknown reasons.
Although the Safety Board was unable to determine conclusively the reason(s) for the flight crew's deviation from standard instrument procedures, it is believed that inordinate management pressures, the first officer's marginal instrument proficiency, the captain's inadequate supervision of the flight, inadequate crew training and procedures, and the captain's chronic fatigue were all factors in the accident."

Accident investigation:
cover
Investigating agency: NTSB
Status: Investigation completed
Duration: 12 months
Accident number: NTSB/AAR-80-05
Download report: Final report

Bronnen:
» ICAO Circular 173-AN/109 (1-30)
» NTSB Safety Recommendations A-80-42/43
» NTSB-AAR-80-5


Veiligheidsmaatregelen

NTSB issued 5 Safety Recommendations

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Foto's

photo of de Havilland Canada DHC-6 Twin Otter 200 N68DE
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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 Boston-Logan International Airport, MA en Rockland-Knox County Regional Airport, ME bedraagt 242 km (151 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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DHC-6 Twin Otter

  • 930+ built
  • 62e ongeval
  • 45e dodelijk ongeval
  • 3e zwaarste ongeval (toen het plaatsvond)
  • 26e zwaarste ongeval (op dit moment)
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