Status: | Accident investigation report completed and information captured |
Datum: | zaterdag 23 juni 1973 |
Tijd: | 03:58 |
Type: | McDonnell Douglas DC-8-61CF |
Vloog voor: | Loftleidir |
Gehuurd van: | Seaboard World Airlines |
Registratie: | N8960T |
Constructienummer: | 45938/331 |
Bouwjaar: | 1968 |
Aantal vlieguren: | 21258 |
Motoren: | 4 Pratt & Whitney JT3D-3B |
Bemanning: | slachtoffers: 0 / inzittenden: 9 |
Passagiers: | slachtoffers: 0 / inzittenden: 119 |
Totaal: | slachtoffers: 0 / inzittenden: 128 |
Schade: | Groot |
Gevolgen: | Repaired |
Plaats: | New York-John F. Kennedy International Airport, NY (JFK) ( Verenigde Staten)
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Fase: | Landing (LDG) |
Soort vlucht: | Internationale lijnvlucht |
Vliegveld van vertrek: | Keflavík International Airport (KEF/BIKF), IJsland |
Vliegveld van aankomst: | New York-John F. Kennedy International Airport, NY (JFK/KJFK), Verenigde Staten |
Beschrijving:Loftleidir Flight 509 originated in Stockholm and was destined for New York with intermediate stops in Oslo and Reykjavik. The flight departed Keflavik Airport at 22:14 EDT. The flight from Keflavik to the outer marker of the ILS for runway 31R at New York-JFK was routine. At 03:56 Flight 509 contacted the tower and was cleared to land on runway 31R; the wind was 200deg at 3 knots. The captain decided to arm the spoilers just before touchdown rather than just after the landing gear had been extended. The latter is called for in the before-landing checklist. Shortly after the call to arm the spoilers, the aircraft struck the runway, tail first, and in a nose-high attitude. Later, the captain stated that he had called for the spoilers to be armed at an altitude between 20 and 30 feet. After impact, all engines were shut down by means of fire shutoff levers; fire extinguishers were discharged.
The first officer stated that because he could not arm the spoilers with his left hand, he had to use both hands. He also stated that he might have pulled back on the activating lever which deployed the spoilers.
Probable Cause:
PROBABLE CAUSE: "The first officer's inadvertent deployment of the ground spoilers in flight while he was attempting to arm the spoiler system. The captain's decision to delay arming of the spoilers until just before touchdown was a contributing factor, because the timing varied from normal procedures and required the crewmembers to act quickly, without time for corrective action."
Accident investigation:
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Investigating agency: | NTSB |
Status: | Investigation completed |
Duration: | 165 days (6 months) | Accident number: | NTSB-AAR-73-20 | Download report: | Final report
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Bronnen:
» NTSB-AAR-73-20
Veiligheidsmaatregelen
As a result of an accident near Toronto on July 5, 1970, involving an Air Canada DC-8, the Federal Aviation Administration issued Airworthiness Directive AD 70-25-02 cautioning pilots against in-flight operation of ground spoilers by requiring the installation of a warning placard in the cockpit and the insertion of an additional Operating Limitation in the Flight Manual.
NTSB issued 2 Safety Recommendations
Issued: 26-NOV-1973 | To: | A-73-111 |
REQUIRE THAT A PROTECTIVE DEVICE BE INSTALLED AS A PART OF THE ACTIVATING LEVER MECHANISM OF THE GROUND SPOILER SYSTEM IN DOUGLAS MODEL DC-8 AIRCRAFT. SUCH A DEVICE SHOULD PREVENT THE INADVERTENT DEPLOYMENT OF GROUND SPOILERS IN FLIGHT. (Closed - Acceptable Action) |
Issued: 26-NOV-1973 | To: | A-73-112 |
AMEND 14 CFR 25 TO REQUIRE THAT GROUND DECELERATION DEVICES WHICH DIRECTLY AFFECT THE LIFT GENERATED BY THE WINGS BE DESIGNED SO THAT THEY CANNOT BE INADVERTENTLY OPERATED IN FLIGHT. (Closed - Unacceptable Action) |
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Foto's
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 Keflavík International Airport en New York-John F. Kennedy International Airport, NY bedraagt 4131 km (2582 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.