Narrative:
A fire started when the No 2 engine first stage fan disk failed just after power was applied for take-off. The take-off was aborted and the aircraft stopped. All passengers and crew evacuated via forward slides, injuring two passengers.
An explosion had occurred in the No 2 engine due to a failed front compressor front hub. The main fuel supply line to the No 2 engine was severed causing the fire. Metallurgical examination revealed that the hub fractured radially through the bore and rim in two locations releasing two sections. Fatigue had originated at a non-conforming circumferential groove at the rear of one tie rod hole. The surface of the groove exhibited a very rough, smeared appearance and there were numerous axial cracks.
Findings
1. COMPRESSOR ASSEMBLY - FATIGUE
2. COMPRESSOR ASSEMBLY - FAILURE,TOTAL
3. INADEQUATE QUALITY CONTROL - MANUFACTURER
| Status: | Accident investigation report completed and information captured |
| Date: | Wednesday 17 February 1982 |
| Time: | 15:45 |
| Type: |  Boeing 727-235 |
| Operator: | Pan American Airways (Pan Am) |
| Registration: | N4734 |
| MSN: | 19454/509 |
| First flight: | 1968-01-09 (14 years 1 months) |
| Total airframe hrs: | 38448 |
| Engines: | 3 Pratt & Whitney JT8D-7B |
| Crew: | Fatalities: 0 / Occupants: 6 |
| Passengers: | Fatalities: 0 / Occupants: 47 |
| Total: | Fatalities: 0 / Occupants: 53 |
| Aircraft damage: | Substantial |
| Aircraft fate: | Repaired |
| Location: | Miami International Airport, FL (MIA) ( United States of America)
|
| Phase: | Takeoff (TOF) |
| Nature: | Domestic Scheduled Passenger |
| Departure airport: | Miami International Airport, FL (MIA/KMIA), United States of America |
| Orlando International Airport, FL (MCO/KMCO), United States of America |
A fire started when the No 2 engine first stage fan disk failed just after power was applied for take-off. The take-off was aborted and the aircraft stopped. All passengers and crew evacuated via forward slides, injuring two passengers.
An explosion had occurred in the No 2 engine due to a failed front compressor front hub. The main fuel supply line to the No 2 engine was severed causing the fire. Metallurgical examination revealed that the hub fractured radially through the bore and rim in two locations releasing two sections. Fatigue had originated at a non-conforming circumferential groove at the rear of one tie rod hole. The surface of the groove exhibited a very rough, smeared appearance and there were numerous axial cracks.
Probable Cause:
Findings
1. COMPRESSOR ASSEMBLY - FATIGUE
2. COMPRESSOR ASSEMBLY - FAILURE,TOTAL
3. INADEQUATE QUALITY CONTROL - MANUFACTURER
Accident investigation:
|
Classification:
Runway mishap
Sources:
» NTSBPhotos
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 Orlando International Airport, FL as the crow flies is 308 km (193 miles).
Distance from Miami International Airport, FL to Orlando International Airport, FL as the crow flies is 308 km (193 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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