1986 Iranian Air Force C-130 crash

The 1986 Iranian Air Force C-130 crash was a military aviation accident that occurred on the evening of 3 November 1986, when a Lockheed C-130 Hercules military transport aircraft of the Islamic Republic of Iran Air Force struck a mountain while approaching Zahedan Airport in southeastern Iran. All 103 occupants, 7 crew members and 96 passengers, were killed. The passengers were predominantly soldiers of the 88th Armoured Division returning from the western front of the Iran–Iraq War. Investigators attributed the accident to the crew descending below the published minimum safe altitude of 6,500 feet (1,981 m), with a malfunctioning altimeter cited as a possible contributing factor.

Background

At the time of the accident, Iran was in the seventh year of the Iran–Iraq War, which had begun in September 1980. The Iranian Air Force was heavily reliant on a fleet of C-130 Hercules transport aircraft acquired from the United States before the 1979 revolution. Following the imposition of U.S. sanctions, the Iranian fleet operated with limited access to spare parts and original-equipment maintenance support.

The aircraft was operating a domestic military shuttle between Bakhtaran (the name given to Kermanshah from 1986 to 1995) in western Iran and Zahedan, the capital of Sistan and Baluchestan Province in the southeast. Zahedan Airport lies about from the city centre, at an elevation of roughly above sea level, and is surrounded by rugged terrain.

Accident

At 19:25 local time on Sunday evening, as the Hercules was preparing to land at Zahedan, it struck the slope of a mountain located approximately east of the airfield. The crash occurred in darkness.

According to the official news agency IRNA cited by Tehran radio, the pilot had requested "free landing" permission from the Zahedan control tower shortly before the crash, stating that he was taking full responsibility for the approach. The tower granted the request because the pilot reported sufficient visibility and altitude, but instructed him to maintain a minimum altitude of 6,500 feet (about ) until established on final approach. The aircraft nevertheless descended below that minimum and impacted high ground.

All 103 people on board were killed, including the 7 crew members and 96 soldiers; press reports indicated that the troops belonged to the 88th Armoured Division of Zahedan and were being moved in connection with the western front.

Cause

The investigation concluded that the immediate cause was the crew's descent below the minimum safe altitude during the night approach. Tehran radio, reporting on the findings, stated that the C-130 had been fitted with a faulty altimeter, and an altimeter misreading or an incorrect altimeter setting were identified as possible contributing factors.

Western analysts cited in contemporary reporting noted that, after six years of war and a sharp drop in oil revenues during 1986, Iran was experiencing acute shortages of spare parts for its U.S.-made aircraft, which had complicated maintenance of the country's ageing C-130 fleet.

Aftermath

The Iranian authorities did not announce the disaster publicly for more than twelve hours. When the news was released on Monday 3 November, Monday was declared a day of mourning in Sistan and Baluchistan province.

At the time, it was the deadliest military aviation accident in Iran since the 29 September 1981 crash near Kahrizak, in which a C-130 transporting senior commanders, including the Defence Minister and the Chief of Staff of the Iranian Army, had been lost. The Zahedan accident has since been listed alongside the 1981, 1994 and 2005 losses as one of the most deadly accidents involving Iranian Air Force C-130s.

According to a chronology compiled by the Mehr News Agency following another Iranian C-130 disaster in 2005, the 1986 accident remained one of the worst military aircraft accidents in the country's post-revolutionary history.

See also

• 1981 Iranian Air Force C-130 crash
• 1994 Iranian Air Force C-130 shootdown
• 2005 Iranian Air Force C-130 crash
• List of accidents and incidents involving the Lockheed C-130 Hercules