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2.5.2.2 Failure of airframe parts during deck operations
Major defects arose during first (July 2012) and subsequent deck trials of the
MiG 29K/KUB on Admiral Gorshkov as reported (July 2013) by Headquarters
Western Naval Command, Mumbai to Directorate of Naval Air Staff. The
Russian Aircraft Corporation (RAC) certified (May 2014) that aircraft
performance of MiG29K/KUB aircraft under tested conditions of INS
Vikramaditya operations mainly conformed to the assigned specifications,
however added that weaknesses were revealed during flight tests, which
were to be eliminated. Directorate of Air Support Equipment informed
(June 2014) RAC MiG that numerous defects55 pertaining to failure of
airframe parts had occurred during deck operations despite modifications.
Responding to audit query (August 2014), Navy stated (September 2014) that
the defects on the aircraft were being monitored and RAC MiG was
being apprised of the criticality to initiate suitable remedial measures.
Audit, however observed from the protocol of the 18th Indo Russian Inter
Governmental Commission – Military Technical Cooperation (IRIGC-MTC)
(August 2015) that defects had occurred despite numerous design
improvements and modifications and regular occurrence of these defects
on sortie to sortie basis was having an adverse impact on Indian Navy pilots
training and capability of aircraft for undertaking prolonged deployments.
2.5.2.3 Fly-by-wire system
Audit observed (December 2014) from the Agenda points of 6th Reliability
and Maintainability Programme Plan (RMPP) for MIG29K/KUB aircraft that
the reliability56 of the fly by wire was very poor, ranging from 3.5 per cent to
55
Defects - Defect of shearing of side bolt of engine mounting, failures of INCOM
mounting tray, failure of Radar scanner mountings had been observed
56 Reliability – calculated in terms of percentage of Mean Time Between Defects
(MTBD) actual as against MTBD by OEM. MTBD is the arithmetic mean flying
hours between defects, calculated by dividing the fleet flying hours in a given
operation period by the number of defects observed in the same operating period
Report No 17 of 2016 (Navy and Coast Guard)
59
7.5 per cent between 01 July 2012 and 30 June 2014 and measures were to be
taken by RAC MiG to improve reliability of the system.