Boeing said the first batch of the Apaches arrived in India and an additional four choppers will be delivered to the IAF next week.
The employees associated with various unions of AAI have formed a joint forum and started the three-day-long strike in front of the Civil Aviation Ministry at Rajiv Gandhi Bhawan here and at AAI offices across the country.
As defence minister, Singh's most crucial challenge will be to speed up the long-delayed modernisation of the three services besides ensuring overall coherence in their combat readiness.
An 18-month to two-year delay is expected in the Mumbai airport slum rehabilitation programme to find alternative land to relocate and resettle approximately 80,000 slum-dwellers, who have encroached on 276 acres of airport land.
Civil Aviation Minister Praful Patel on Tuesday lashed out at the Planning Commission, holding it responsible for the delay in the modernisation of Kolkata and Chennai airports.
FM earmarks Rs 7,060 crore for the project.
The nation has the fifth largest defence budget in the world, at $52.5 billion in 2017 ($51.1 billion in 2016), overtaking the UK whose defence budget fell from $52.5 billion in 2016 to $50.7 billion in 2017.
The ministry of defence has set a goal of $26 billion, including export of $7 billion for the industry by 2025-26 through its Defence Production Policy 2018.
The Indian Railways is replacing its outdated signalling system with the latest automated train protection technologies - European Train Control System and Train Collision Avoidance System.
The projects cover 40,000 acres across 40 existing and seven new airports, according to the Airport Realty Report by global property consultancy Cushman & Wakefield.