New Delhi: In an attempt to remind the Indian air carriers not to ‘compromise’ or take a ‘short-cut’ on safety, the Directorate General of Civil Aviation on Friday warned Air India Express  and Kingfisher Airlines of strict action if they fail to come up with a ‘specific and realistic’ time-table to meet all required safety measures.

Showing urgency on the safety issue, the country's aviation regulator has given time till Monday to both Vijay Mallya-owned private airline and Air India's low budget air carrier to come up with a firm time-line to fulfill the required safety parameters.

"We have told Kingfisher to come up with a firm time-line by Monday. A similar letter has also been sent to the (Air India's low-cost arm) Air India Express," DGCA chief E K Bharat Bhushan said.

Kingfisher was asked to submit plans on how it would restore its flight schedules, curtailed since November, and proposals on its recapitalization.

The decision followed a financial surveillance by the DGCA which found widespread sickness in the sector seriously impacting safety issues.

Following the report, DGCA issued a stern warning to all carriers, including these two, to take immediate rectificatory measures to resolve the lapses or face action.

"We have asked them to come up with specific and realistic time-table (to meet all safety requirements). We will be watching it closely," Bhushan said.

Non-compliance would invite stringent action, he said, adding "We have various options to take against them", including the final step of cancellation of their crucial flying permit.

Apart from cancellation of permits, the surveillance report recommended steps like curtailing of flight schedules and asking the carriers to fly a lesser number of aircraft which they can properly maintain.

As many as 157 slots of Kingfisher were withdrawn by DGCA as it was not operating them, with 21 out of the 60 aircraft fleet remaining grounded, sources said.