The most significant setback to production of MBT Arjun was the change in requirements put forth by the Army in February 2007. The tanks produced by HVF, Avadi were to be issued to the Army after inspection at the factory site in the Joint Receipt Inspection by the representatives of HVF, DRDO and Army. The issued tanks were put through two trials - the Field Trial and the Accelerated usage-cum-reliability trials (AUCRT), by the Army. Joint Receipt Inspection was conducted (March 2005) for first five MBT Arjun manufactured (2003-04) in the pilot phase, one year after production. The inspection of the second lot of nine pilot MBT Arjun, took place in February 2007, two years after production. By 2007, 53 MBT had already been produced by HVF, Avadi. It was during this inspection in February 2007 that Army reported water ingress in the fighting compartment of tank while crossing shallow parts of a river and raised two additional requirements in the design of the MBT Arjun viz. zero level ingress of water in the fighting compartment and lead time for fording (time from tank’s entry into water to exit from water) to be minimised to 30 minutes.
We noticed that the corresponding benchmark fixed by the Army for T-90 tank was more relaxed, allowing 2.5 litres of water ingress. The requirement of zero level water ingress for medium fording was not stipulated in the Army’s requirements (GSQR of 1985) or in subsequent stages of development which had seen many changes in design. In fact, the Joint Action Plan (of Army and DRDO), in August 1999, had cleared the medium fording capability of MBT Arjun. This issue was also not raised in the Joint Receipt Inspection of the first batch of pilot MBT Arjun. The new requirements necessitated the DRDO to modify the design of the second lot of nine pilot MBT Arjun. The same got modified and were issued to Army by September 2007. The first lot of five pilot tanks was brought back from Army, got modified and issued to Army till October 2007. Balance 39 tanks of the bulk production were dismantled, reworked and issued to the Army in 2008-10. The whole task of dismantling and reassembly of 53 MBTs entailed an additional cost of Rs 84 lakh. The Ministry stated (May 2014) that modifications were considered essential to improve overall performance from user’s perspective. The reply undermines the impact of the modifications in derailing the production and issue of MBT Arjun, which was a significant factor that led to an import of T-90 tanks that cost Rs 4,913 crore in November 2007 as discussed in Paragraph 8.3.4. The reply also does not address why the benchmarks on MBT Arjun regarding water ingress and fording, were more stringent than the corresponding requirements on T-90 tank.
Medium fording was one of the eight instances we noticed, where Army placed benchmark of parameters on MBT Arjun which were more stringent in comparison to those placed on T-90 tanks. These are detailed in Annexure XIX. We could not assess the impact of these benchmarks on the performance of the two tanks from our scrutiny of the Report on comparative trials of MBT Arjun and T-90 tank (February/ March 2010- referred to in Paragraph 8.3.2.8 ). While we appreciate the Army’s quest for improving the quality of MBT Arjun, the imposition of more stringent parameters precluded a level playing field and more importantly, the inability to freeze the designs led to several changes in design, consequent delays in acceptance of MBT Arjun by the Army and in the overall, the production and issue of MBT Arjun.