Iran Air Flight 742 was a passenger flight which performed an emergency landing at Mehrabad International Airport, Tehran, Iran, on 18 October 2011. After the nose gear failed to deploy, the crew diverted to Mehrabad and landed without the nose gear down. All 113 aboard survived.
The aircraft involved, a Boeing 727-200, was operating Iran Air's scheduled international service from Sheremetyevo International Airport, Moscow, Russia, to Tehran Imam Khomeini International Airport.
At 15:20 local time the flight was approaching Tehran with 94 passengers and 19 crew, when the crew did not receive a down and locked indication for the nose gear and aborted the approach. Following unsuccessful troubleshooting the crew decided to divert to Mehrabad where a low approach confirmed the nose gear was not extended. The crew subsequently performed a landing without the nose gear on runway 29L at about 16:00 local time and came to a stand still on both main gear and the nose of the aircraft. The aircraft was evacuated, no injuries occurred.