IAF brings down accident rate, including of MiG21, to new low
New Delhi, June 6 (UNI) A small defect in an otherwise inconsequential part on the MiG-21 caused several accidents of the much-maligned fighter before the fault was noticed and rectified under the Indian Air Force's new flight safety measures, which have seen accidents this year decrease 50 per cent over the rate of the last decade.
''An ultra-fine hole, or the slide valve on the fuel pipe of the aircraft, was gathering dust, thus constricting the fuel supply.
This led to the flame-out condition resulting in an accident,'' IAF's Director General (Inspection&Safety) Air Marshal P S Ahluwalia today said.
He said the fault was noticed and rectified by silver-plating the orifice and providing more holes to ensure an uninterrupted fuel supply.
Asked why the fault, which caused several of the aircraft variant to crash and earn it the notorious tag of 'flying coffin', was not noticed earlier, Air Marshal Ahluwalia noted that an aircraft contained 50,000 components and checking all of them was immensely time-consuming.
''Moreover, at the speed the aircraft crashes into the ground, it does not leave a lot of evidence,'' he pointed out, at a press conference here.
The DG (I&S) said the IAF has brought down its accident rate to a new low of 0.44 (per ten thousand flying hours) for the year 2005-06, a drop of 50 per cent compared to the decade from 1993-94 to 2003-04.
The figure includes a drop of 57 per cent in its fighter fleet including the much-maligned MiG-21, he said.
''In 2005-06, the force's fighters flew a total of 71,000 hours, of which the MiG-21s flew as many as 28,000 to 29,000 hours,'' he said.
The corresponding figures for the year 2004-05 were a total of 71, 232 hours with the MiGs chipping in with 29,000 hours. The accident rate was 0.65.
He said 90 per cent of the accidents were due to human or technical error, with both comprising 42 to 43 and 45 to 46 per cent, respectively. ''The chief causes are spatial disorientation in the first category and power plant or engine malfunctions in the second,'' he said, adding efforts were on to further reduce them.
Attributing the sharp arrest in the accident rates to a slew of measures, including identifying root causes of aircraft accidents and focussing remedial measures in the spheres of technology, capability of man and machine, training of personnel and the operating environment, Air Marshal Ahluwalia said the Expert Committee on Aircraft Accidents (EXCOM), constituted by the Defence Minister in December 2004, had laid the groundwork for a comprehensive action plan to reduce aircraft losses to a minimum.
''To maintain the momentum, the Defence Ministry had constituted a task team under my chairmanship for the time-bound implementation of the EXCOM's recommendations,'' he said.
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