Narrative:
The first officer was performing the takeoff on runway 09L. Takeoff engine thrust was set at 1.42 EPR. All engines operated normally and the aircraft accelerated normally with no unusual vibration felt. Upon reaching the V 1 speed, they heard a loud bang and observed a flash on the right side of the aircraft. The aircraft veered slightly to the right. He, the captain, took control and rejected the takeoff. The flight engineer reported an engine failure. The aircraft was stopped on the runway about 1,000 feet from the departure end. The ATC local controller reported that the No. 4 engine was on fire. They performed the engine fire procedures and fired the engine fire bottles for the No. 4 engine. Airport emergency equipment arrived and extinguished the fire.
PROBABLE CAUSE: "Failure of the No. 4 engine fifth stage turbine hub due to a cyclic stress rupture for undetermined reasons, which resulted in an uncontained failure of the engine"
Uncontained engine failure
Runway mishap
» Scramble 201(49)
| Status: | Accident investigation report completed and information captured |
| Date: | Monday 23 October 1995 |
| Time: | 03:50 |
| Type: |  Boeing 747-121 (SCD) |
| Operator: | Tower Air |
| Registration: | N613FF |
| MSN: | 19647/16 |
| First flight: | 1970-01-31 (25 years 9 months) |
| Total airframe hrs: | 22911 |
| Engines: | 4 Pratt & Whitney JT9D-7AH |
| Crew: | Fatalities: 0 / Occupants: 3 |
| Passengers: | Fatalities: 0 / Occupants: 2 |
| Total: | Fatalities: 0 / Occupants: 5 |
| 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 |
| Port of Spain-Piarco Airport (POS/TTPP), Trinidad and Tobago | |
| Flightnumber: | 803 |
The first officer was performing the takeoff on runway 09L. Takeoff engine thrust was set at 1.42 EPR. All engines operated normally and the aircraft accelerated normally with no unusual vibration felt. Upon reaching the V 1 speed, they heard a loud bang and observed a flash on the right side of the aircraft. The aircraft veered slightly to the right. He, the captain, took control and rejected the takeoff. The flight engineer reported an engine failure. The aircraft was stopped on the runway about 1,000 feet from the departure end. The ATC local controller reported that the No. 4 engine was on fire. They performed the engine fire procedures and fired the engine fire bottles for the No. 4 engine. Airport emergency equipment arrived and extinguished the fire.
Probable Cause:
PROBABLE CAUSE: "Failure of the No. 4 engine fifth stage turbine hub due to a cyclic stress rupture for undetermined reasons, which resulted in an uncontained failure of the engine"
Accident investigation:
 |
|
Classification:
Rejected takeoffUncontained engine failure
Runway mishap
Sources:
» NTSB» Scramble 201(49)
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 Port of Spain-Piarco Airport as the crow flies is 2597 km (1623 miles).
Distance from Miami International Airport, FL to Port of Spain-Piarco Airport as the crow flies is 2597 km (1623 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.
The Aviation Safety Network is an exclusive service provided by:
Quick Links:
| ASN Home | Send Correction / Feedback |
| FSF Home | Disclaimer | Copyright |
| Contact Us | Privacy Policy |
| Press / Media |
CONNECT WITH US:
©2023 Flight Safety Foundation