Tehran - Tehran

The aircraft, engaged on a copilot's check in instrument flying and one engine flying, took off from Mehrabad Airport at 0909LT with a Captain acting as check pilot, four copilots under test and a flight engineer. Difficulties were met in feathering and unfeathering during the first flight and the aircraft returned to the apron for advice. The aircraft took off again at 1048 LT for further checks. At approximately 1129LT and at 6,700 feet the port propeller was feathered. A few minutes later the port propeller overspeeded when the Captain tried to unfeather it and, despite repeated efforts, the crew did not succeed in unfeathering or refeathering it and it continued to windmill at about 2100 RPM. Height could not be maintained and the aircraft crash landed in open country 1,500 meters short of Runway 11 at Mehrabad Airport. The aircraft was wrecked causing serious injuries to three occupants and minor injuries to the other three.

Flight / Schedule

Tehran - Tehran

Registration

EP-ACV

MSN

12919

Year of Manufacture

1944

Operator

Iran Air

Date

June 30, 1953 at 11:35 AM

Type

CRASH

Flight Type

Training

Flight Phase

Landing (descent or approach)

Crash Site

Airport (less than 10 km from airport)

Crash Location

Tehran-Mehrabad Tehran City District

Region

Asia • Iran

Crash Cause

Human factor

Narrative Report

On June 30, 1953 at 11:35 AM, Tehran - Tehran experienced a crash involving Douglas C-47 Skytrain (DC-3), operated by Iran Air, with the event recorded near Tehran-Mehrabad Tehran City District.

The flight was categorized as training and the reported phase was landing (descent or approach) at a airport (less than 10 km from airport) crash site.

6 people were known to be on board, 0 fatalities were recorded, 6 survivors were identified or estimated. This corresponds to an estimated fatality rate of 0.0%.

Crew on board: 6, crew fatalities: 0, passengers on board: 0, passenger fatalities: 0, other fatalities: 0.

The listed crash cause is human factor. The aircraft, engaged on a copilot's check in instrument flying and one engine flying, took off from Mehrabad Airport at 0909LT with a Captain acting as check pilot, four copilots under test and a flight engineer. Difficulties were met in feathering and unfeathering during the first flight and the aircraft returned to the apron for advice. The aircraft took off again at 1048 LT for further checks. At approximately 1129LT and at 6,700 feet the port propeller was feathered. A few minutes later the port propeller overspeeded when the Captain tried to unfeather it and, despite repeated efforts, the crew did not succeed in unfeathering or refeathering it and it continued to windmill at about 2100 RPM. Height could not be maintained and the aircraft crash landed in open country 1,500 meters short of Runway 11 at Mehrabad Airport. The aircraft was wrecked causing serious injuries to three occupants and minor injuries to the other three.

Aircraft reference details include registration EP-ACV, MSN 12919, year of manufacture 1944.

Fatalities

Total

0

Crew

0

Passengers

0

Other

0

Crash Summary

The aircraft, engaged on a copilot's check in instrument flying and one engine flying, took off from Mehrabad Airport at 0909LT with a Captain acting as check pilot, four copilots under test and a flight engineer. Difficulties were met in feathering and unfeathering during the first flight and the aircraft returned to the apron for advice. The aircraft took off again at 1048 LT for further checks. At approximately 1129LT and at 6,700 feet the port propeller was feathered. A few minutes later the port propeller overspeeded when the Captain tried to unfeather it and, despite repeated efforts, the crew did not succeed in unfeathering or refeathering it and it continued to windmill at about 2100 RPM. Height could not be maintained and the aircraft crash landed in open country 1,500 meters short of Runway 11 at Mehrabad Airport. The aircraft was wrecked causing serious injuries to three occupants and minor injuries to the other three.

Cause: Human factor

Occupants & Outcome

Crew On Board

6

Passengers On Board

0

Estimated Survivors

6

Fatality Rate

0.0%

Known people on board: 6

Operational Details

Schedule / Flight

Tehran - Tehran

Operator

Iran Air

Flight Type

Training

Flight Phase

Landing (descent or approach)

Crash Site

Airport (less than 10 km from airport)

Region / Country

Asia • Iran

Aircraft Details

Registration

EP-ACV

MSN

12919

Year of Manufacture

1944