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Crash of a Boeing 727-286 in Orūmīyeh: 78 killed
Date & Time:
Jan 9, 2011 at 1945 LT
Operator:
Registration:
EP-IRP
Survivors:
Yes
Schedule:
Tehran - Orumiyeh
MSN:
20945/1048
YOM:
1974
Flight number:
IR277
Crew on board:
9
Crew fatalities:
Pax on board:
96
Pax fatalities:
Other fatalities:
Total fatalities:
78
Aircraft flight hours:
9019
Circumstances:
The aircraft departed Tehran-Mehrabad Airport at 1815LT with a delay of more than two hours due to poor weather conditions at destination. While descending to Orūmīyeh Airport by night, the crew encountered poor weather conditions with snow falls, visibility 800 metres and three ceilings at 1,500, 2,000 and 6,000 feet. After the crew was unable to intercept the ILS, the decision to initiate a go-around procedure was taken. Approaching the stall speed, the stick shaker activated and the aircraft probably encountered icing conditions. In a left bank angle estimated between 26 and 40°, the engine n°3 and 1 failed. At an altitude of 600 feet and at a speed of 96 knots, the flaps were retracted, causing the aircraft to stall and to impact the ground. The aircraft broke in three but there was no fire. 70 passengers and 8 crew members were killed while 27 other occupants were injured, some seriously.
Probable cause:
Bad weather conditions for the aircraft and inappropriate actions by cockpit crew to confront the situation is the main cause of the accident. The following contributing factors were identified:
- The old technology of aircraft systems,
- Absence of a suitable simulator for adverse weather conditions,
- Failure to correctly follow the operating manual by the flight crew,
- Inadequate cockpit resources management (CRM).
- The old technology of aircraft systems,
- Absence of a suitable simulator for adverse weather conditions,
- Failure to correctly follow the operating manual by the flight crew,
- Inadequate cockpit resources management (CRM).
Crash of a Fokker 100 in Tehran
Date & Time:
Jan 19, 2009 at 1701 LT
Operator:
Registration:
EP-CFN
Survivors:
Yes
Schedule:
Ardabil - Tehran
MSN:
11423
YOM:
1993
Crew on board:
8
Crew fatalities:
Pax on board:
106
Pax fatalities:
Other fatalities:
Total fatalities:
0
Circumstances:
After landing on runway 29L at Tehran-Mehrabad Airport, the right main gear collapsed. The aircraft veered off runway to the right and came to rest. All 114 occupants were uninjured and the aircraft was damaged beyond repair.
Probable cause:
Failure of the right main gear upon landing for unknown reasons.
Crash of a Fokker 100 in Tehran
Date & Time:
Jan 2, 2008 at 0732 LT
Operator:
Registration:
EP-IDB
Survivors:
Yes
Schedule:
Tehran - Shiraz
MSN:
11299
YOM:
1990
Flight number:
IR235
Crew on board:
8
Crew fatalities:
Pax on board:
105
Pax fatalities:
Other fatalities:
Total fatalities:
0
Aircraft flight hours:
30732
Aircraft flight cycles:
33933
Circumstances:
While preparing the flight at Tehran-Mehrabad Airport, the copilot proceeded with a walk around check of the airplane. As the OAT was near freezing level and there were some light snow showers, he requested a deicing. Nevertheless, as there were already a few number of aircraft waiting for deicing, the captain decided to takeoff without deicing. At 0731LT, the crew was cleared for takeoff and started the takeoff procedure. After liftoff, the aircraft started to roll to the left then to the right. Losing altitude, the left wing impacted ground and the aircraft crash landed, coming to rest and bursting into flames. All 113 occupants were rescued, among them 11 were seriously injured including four crew members.
Probable cause:
It was determined that the accident was the consequence of an aerodynamic stall after lift off due to a loss of lift because the wings were contaminated and that the aircraft had not been deiced prior to takeoff.
The following contributing factors were identified:
- Poor crew resources management,
- Poor flight preparation,
- Lack of knowledge about winter operations on part of the operator.
The following contributing factors were identified:
- Poor crew resources management,
- Poor flight preparation,
- Lack of knowledge about winter operations on part of the operator.
