Narrative:
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: "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."
Forced landing on runway
| Status: | Accident investigation report completed and information captured |
| Date: | Thursday 29 July 1999 |
| Time: | 15:00 |
| Type: |  Boeing 747-269B |
| Operator: | Kitty Hawk International |
| Registration: | N707CK |
| MSN: | 21541/332 |
| First flight: | 1978-07-17 (21 years ) |
| Total airframe hrs: | 59727 |
| Engines: | 4 Pratt & Whitney JT9D-7J |
| Crew: | Fatalities: 0 / Occupants: 5 |
| Passengers: | Fatalities: 0 / Occupants: 0 |
| Total: | Fatalities: 0 / Occupants: 5 |
| Aircraft damage: | Substantial |
| Aircraft fate: | Repaired |
| Location: | near Anchorage International Airport, AK (ANC) ( United States of America)
|
| Phase: | En route (ENR) |
| Nature: | Cargo |
| Departure airport: | Anchorage International Airport, AK (ANC/PANC), United States of America |
| Bangkok-Don Muang International Airport (BKK/VTBD), Thailand |
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:
 |
|
Classification:
Uncontained engine failureForced landing on runway
Sources:
» NTSB id 20001212X19142Photos
Map
This map shows the airport of departure and the intended destination of the flight. The line between the airports does not display the exact flight path.
Distance from Anchorage International Airport, AK to Bangkok-Don Muang International Airport as the crow flies is 9582 km (5989 miles).
Distance from Anchorage International Airport, AK to Bangkok-Don Muang International Airport as the crow flies is 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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