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Last updated: 14 November 2018
Status:Final
Date:Thursday 15 October 2015
Time:07:18
Type:Silhouette image of generic B743 model; specific model in this crash may look slightly different
Boeing 747-3B3
Operator:Mahan Air
Registration: EP-MNE
C/n / msn: 23480/641
First flight: 1984-04-14 (31 years 6 months)
Total airframe hrs:92754
Cycles:17679
Engines: 4 General Electric CF6-50E2
Crew:Fatalities: 0 / Occupants: 19
Passengers:Fatalities: 0 / Occupants: 422
Total:Fatalities: 0 / Occupants: 441
Aircraft damage: Substantial
Aircraft fate: Written off (damaged beyond repair)
Location:near Tehran-Mehrabad Airport (THR) (   Iran)
Phase: Initial climb (ICL)
Nature:Domestic Scheduled Passenger
Departure airport:Tehran-Mehrabad Airport (THR/OIII), Iran
Destination airport:Bandar Abbas Airport (BND/OIKB), Iran
Flightnumber:1095
Narrative:
Mahan Air flight 1095 returned to land at Tehran-Mehrabad Airport, Iran after suffered an uncontained engine failure.
The aircraft, a Boeing 747-300, registered EP-MNE operated a scheduled flight from Mehrabad International Airport to Bandar Abbas Airport, carrying 19 flight crew and 422 passengers. The aircraft departed from Tehran at 07:16 hours local time.
About 07:18, while climbing through 7500 feet, the no.3 General Electric CF6-50E2 engine suffered an uncontained failure. Some parts of the engine detached and struck engine no. 4, as well as aircraft structure. The aircraft hydraulic systems no 1, 3 and 4 failed due to impact of debris from engine no.3. An emergency landing was made back at Tehran at 07:53.

Investigation revealed that the engine failure was initiated by vibration as a result of unbalance of the engine HPT module, which caused crack propagation in the low pressure turbine (LPT)

Probable Cause:

CAUSE of ACCIDENT:
The operator’s fault to modify the ENG# 3 with AD requirement, and ineffective action for N1 Vibration which caused uncontained engine failure.
Contributing factors:
- Insufficient operator maintenance & engineering performance
- Lack of effective monitoring in operators line maintenance
- Lack of support for engine parts and mandatory information from the manufacturer
- Lack of effective monitoring in Mahan air concerning operation, training and technical divisions.

Accident investigation:
cover
Investigating agency: AAIB Iran
Status: Investigation completed
Duration: 12 months
Accident number: A13940723EPMNE
Download report: Final report

Classification:
Failure to follow AD and SB's
Uncontained engine failure
Forced landing on runway

Follow-up / safety actions

AAIB Iran issued 6 Safety Recommendations

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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 Tehran-Mehrabad Airport to Bandar Abbas Airport as the crow flies is 1050 km (656 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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Boeing 747

  • 1540+ built
  • 61st loss
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 Iran
  • 62nd worst accident (at the time)
  • 64th worst accident (currently)
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