Air India is awaiting directions from the country's directorate general of civil aviation (DGCA) on when it can resume flights with its fleet of six Boeing 787s.
A spokesman for the airline told Flightglobal Pro that Boeing has teams on the ground making the necessary modifications to the carrier's 787s lithium-ion batteries and containment systems, but could not say whether any test flights have been scheduled.
He adds that "no specific official date" has been set for the 787s to resume commercial operations, and that directions must come from the DGCA.
India's DGCA issued its own grounding orders for the type shortly after the US Federal Aviation Administration issued an airworthiness directive to ground US-registered 787s on 16 January.
Following the installation of the new battery configurations and containment systems, some of Ethiopian Airlines and Qatar Airways' 787s have returned to commercial operations.
Japanese carrier All Nippon Airways and Japan Airlines have both begun proving flights on their modified 787s and are planning to resume commercial services with the aircraft type on 1 June.
Prior to the grounding, Air India used its 787s on services from Delhi to Frankfurt, Paris and Dubai and on some domestic services. It is understood that these long-haul services are being operated by Boeing 777-200LRs and -300ERs in the interim.
Flightglobal's Ascend Online database shows that the carrier still has 21 787-8s on order, with deliveries due out to 2016.