BENGALURU (Reuters), – Indian budget carrier SpiceJet Ltd announced Wednesday that India’s aviation regulator asked 90 SpiceJet Ltd pilots not to fly Boeing (NYSE:) 737 MAX airplanes.

SpiceJet currently has 11 MAX planes and 144 pilots. The pilots are now restricted from flying MAX jets while they receive retraining by the Directorate General of Civil Aviation (DGCA).

SpiceJet spokeswoman said that these pilots will continue to be available for use on other Boeing 737 aircraft. The restriction also does not affect the operation of MAX aircraft.

Boeing is South Asia’s largest MAX plane customer. The planemaker didn’t immediately reply to Reuters’ request for comment.

We will ensure that pilots are retrained successfully, and Arun Kumar, director general of India’s aviation safety watchdog DGCA said.

Following two deadly crashes in 2019 and a regulatory grounding of nearly two years, the regulator allowed the 737 MAX plane to fly in August.

In March 2019, Boeing’s 737 MAX aircraft was grounded in all 50 countries after it crashed twice in five months. 346 people were killed in the crashes, which plunged Boeing into a severe financial crisis. This was compounded further by the COVID-19 epidemic.