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Last updated: 16 January 2019
Statuts:Préliminaire
Date:dimanche 18 février 2018
Heure:09:32
Type/Sous-type:Silhouette image of generic AT72 model; specific model in this crash may look slightly different
ATR 72-212
Compagnie:Iran Aseman Airlines
Immatriculation: EP-ATS
Numéro de série: 391
Année de Fabrication: 1993-10-26 (24 years 4 months)
Moteurs: 2 Pratt & Whitney Canada PW126
Equipage:victimes: 6 / à bord: 6
Passagers:victimes: 60 / à bord: 60
Total:victimes: 66 / à bord: 66
Dégats de l'appareil: Détruit
Conséquences: Written off (damaged beyond repair)
Lieu de l'accident:15 km (9.4 milles) NE of Yasuj Airport (YES) (   Iran)
Élévation des lieux de l'accident: 3600 m (11811 feet) amsl
Phase de vol: En vol (ENR)
Nature:Transport de Passagers Nat.
Aéroport de départ:Tehran-Mehrabad Airport (THR/OIII), Iran
Aéroport de destination:Yasuj Airport (YES/OISY), Iran
Numéro de vol:EP3704
Détails:
Iran Aseman Airlines flight 3704 from Tehran to Yasuj, Iran, impacted a mountainside in the Mount Dena range to the northeast of Yasuj Airport. All on board (60 passengers, two flight crew members, two cabin crew members and two security officers) were killed.
The flight departed Mehrabad Airport at 08:05 hours local time and climbed to the cruising altitude of FL210. At 09:22 the aircraft was over the Isfahan (IFN) VOR. The flight requested permission to descend from FL210 to FL170. This was approved by Tehran ACC. The flight followed Airway W114 from the OBTUX navaid to the Yasuj DVOR/DME. Minimum altitude on that airway is FL170. Minimum safe altitude over the sector close to Yasuj Airport is 15500 feet.
Flight tracking website Flightradar24 shows that the aircraft reached FL170 at 09:25:59. At 09:29:10 the aircraft was 14 nautical miles from the airport. Last radio contact with the flight was at 09:30:10, when the pilots acknowledged a weather report.
At 09:32:00 the pilot keyed the mic but there was no transmission. Attempts to contact the flight by the Yasuj controller at 09:34 were fruitless.
The wreckage was located the following day at an elevation of about 3600 m (11800 feet). Weather conditions at the crash site included snow and strong winds.

The approach procedure for Yasuj Airport is a circling NDB approach with a 25NM minimum safe altitude circle of 11500 ft - 15500 ft. Flights from Tehran first have to cross Mount Dena, which is an 80 km mountain range with a highest elevation of 4,409 m (14,465 ft). After arriving over the NDB at the airport at 15,000 feet, a teardrop approach has to be flown for landing on runway 13/31.

Sources:
» PressTV
» Mehr News

METAR Weather report:
05:30 UTC / 09:00 local time:
OISY 180530Z 09004KT 9999 FEW035CB SCT040 OVC090 14/M01 Q1022

06:00 UTC / 09:30 local time:
OISY 180600Z 13004KT 9999 FEW035CB SCT040 OVC090 13/M00 Q1021

06:30 UTC / 10:00 local time:
OISY 180630Z 14006KT 9999 FEW035CB SCT040 OVC090 15/M02 Q1021


Photos

photo of ATR 72-212 EP-ATS
debris on mountain slope
photo of ATR 72-212 EP-ATS
accident mountain
photo of ATR 72-212 EP-ATS
Direct line from OBTUX navaid to Yasuj DVOR/DME; accident location 2 km to the left
photo of ATR 72-212 EP-ATS
Yasuj approach chart with accident location
photo of ATR 72-212 EP-ATS
Add your photo of this accident or aircraft
 

Aircraft history
date registration operator remarks
26 Oct. 1993 F-WWED ATR first flight
12 Dec. 1993 EP-ATS Iran Aseman Airlines delivered
2011 EP-ATS Iran Aseman Airlines stored at Shiraz
Nov. 2017 EP-ATS Iran Aseman Airlines restored to service

Plan
Ce plan montre l'aéroport de départ ainsi que la supposée destination du vol. La ligne fixe reliant les deux aéroports n'est pas le plan de vol exact.
La distance entre Tehran-Mehrabad Airport et Yasuj Airport est de 551 km (345 miles).
Accident location: Approximate; accuracy within a few kilometers.

Les informations ci-dessus ne représentent pas l'opinion de la 'Flight Safety Foundation' ou de 'Aviation Safety Network' sur les causes de l'accident. Ces informations prélimimaires sont basées sur les faits tel qu'ils sont connus à ce jour.
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