Narrative:
Shortly after takeoff from runway 09R, the no. 3 engine and pylon separated from the airplane as a result of the failure of the pylon inboard midspar support fitting. The fitting had cracked due to fatigue, and had been cracked for some time. The point of cracking was not visible for inspection on the wing. The fitting is the subject of FAA Airworthiness Directive 88-24-10 and Boeing Service Bulletin 3183 which require visual inspection of the midspar fitting each 1500 flight hours or 600 cycles. This inspection had been completed on the failed fitting on January 2, 1992, 821 flight hours and 328 cycles before the failure.
PROBABLE CAUSE: "Failure of the #3 engine pylon inboard midspar support fitting due to fatigue cracking which resulted in the separation of the number three engine and pylon. Contributing to the accident was the inadequate inspection requirements of the manufacturer and the faa to detect cracks in the midspar fitting."
Forced landing on runway
» NTSB Safety Recommendations A-92-38
| Status: | Accident investigation report completed and information captured |
| Date: | Saturday 25 April 1992 |
| Time: | 18:15 |
| Type: |  Boeing 707-324C |
| Operator: | Tampa Colombia |
| Registration: | HK-3604X |
| MSN: | 19352/576 |
| First flight: | 1967-04-19 (25 years ) |
| Total airframe hrs: | 53257 |
| Cycles: | 20399 |
| Engines: | 4 Pratt & Whitney JT3D-3B |
| Crew: | Fatalities: 0 / Occupants: 3 |
| Passengers: | Fatalities: 0 / Occupants: 0 |
| Total: | Fatalities: 0 / Occupants: 3 |
| Aircraft damage: | Substantial |
| Aircraft fate: | Repaired |
| Location: | Miami International Airport, FL (MIA) ( United States of America)
|
| Phase: | Takeoff (TOF) |
| Nature: | Cargo |
| Departure airport: | Miami International Airport, FL (MIA/KMIA), United States of America |
| Cali-Alfonso Bonilla Aragón Airport (CLO/SKCL), Colombia |
Shortly after takeoff from runway 09R, the no. 3 engine and pylon separated from the airplane as a result of the failure of the pylon inboard midspar support fitting. The fitting had cracked due to fatigue, and had been cracked for some time. The point of cracking was not visible for inspection on the wing. The fitting is the subject of FAA Airworthiness Directive 88-24-10 and Boeing Service Bulletin 3183 which require visual inspection of the midspar fitting each 1500 flight hours or 600 cycles. This inspection had been completed on the failed fitting on January 2, 1992, 821 flight hours and 328 cycles before the failure.
Probable Cause:
PROBABLE CAUSE: "Failure of the #3 engine pylon inboard midspar support fitting due to fatigue cracking which resulted in the separation of the number three engine and pylon. Contributing to the accident was the inadequate inspection requirements of the manufacturer and the faa to detect cracks in the midspar fitting."
Accident investigation:
 |
|
Classification:
Engine separationForced landing on runway
Sources:
» Flight International» NTSB Safety Recommendations A-92-38
Follow-up / safety actions
NTSB issued 1 Safety Recommendation
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Photos
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 Miami International Airport, FL to Cali-Alfonso Bonilla Aragón Airport as the crow flies is 2494 km (1558 miles).
Distance from Miami International Airport, FL to Cali-Alfonso Bonilla Aragón Airport as the crow flies is 2494 km (1558 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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