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Last updated: 25 June 2019
Status:Definitief
Datum:donderdag 29 juli 1999
Tijd:15:00
Type:Silhouette image of generic B742 model; specific model in this crash may look slightly different
Boeing 747-269B
Luchtvaartmaatschappij:Kitty Hawk International
Registratie: N707CK
Constructienummer: 21541/332
Bouwjaar: 1978-07-17 (21 years )
Aantal vlieguren:59727
Motoren: 4 Pratt & Whitney JT9D-7J
Bemanning:slachtoffers: 0 / inzittenden: 5
Passagiers:slachtoffers: 0 / inzittenden: 0
Totaal:slachtoffers: 0 / inzittenden: 5
Schade: Groot
Gevolgen: Repaired
Plaats:nabij Anchorage International Airport, AK (ANC) (   Verenigde Staten)
Fase: Kruisvlucht (ENR)
Soort vlucht:Vracht
Vliegveld van vertrek:Anchorage International Airport, AK (ANC/PANC), Verenigde Staten
Vliegveld van aankomst:Bangkok-Don Muang International Airport (BKK/VTBD), Thailand
Beschrijving:
A Boeing 747-269B airplane, N707CK, had an uncontained engine failure during climb-out from the Anchorage International Airport, Alaska. There were no injuries to the five crewmembers aboard.
During climbout, the Boeing 747 crew noted a loud 'thump,' followed by a change in the number three engine instrument indications. One crewmember noted there was a fist-sized hole in the side of the engine cowling. The captain shut down the number three engine, returned to the departure airport, and landed without further incident. A post landing inspection revealed that the inboard aileron sustained substantial damage.

Probable Cause:

PROBABLE CAUSE: "The failure of a turbine blade, and subsequent penetration of the shroud (containment ring). A factor associated with the accident was the FAA's insufficient design standards/requirements addressed in an FAA Airworthiness Directive, which called for a strengthened containment ring. The failed containment ring was in compliance with the Air Worthiness Directive."

Accident investigation:
cover
Investigating agency: NTSB
Status: Investigation completed
Duration: 2 years
Accident number: ANC99LA099
Download report: Summary report

Bronnen:
» NTSB id 20001212X19142


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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 Anchorage International Airport, AK en Bangkok-Don Muang International Airport bedraagt 9582 km (5989 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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