Hong Kong (CNN Business) Three of China's largest airlines have joined a growing list of carriers demanding compensation from Boeing over the grounding of its 737 Max aircraft.

Air China, China Eastern Airlines and China Southern Airlines told CNN Business on Wednesday that they have asked to be reimbursed for costs they have incurred since the plane was deemed unsafe to fly following two crashes.

They cited losses caused by being unable to fly the aircraft and delayed deliveries of more jets.

Boeing BA The companies did not disclose how much in damages they are seeking from

China Southern has as many as 24 737 Max jets and Air China has 15 of the planes in its fleet, spokespeople for the companies said. China Eastern has 14 737 Max planes, according to Chinese state-run media.

An Air China Boeing 737 MAX 8 plane seen on March 11 after it was grounded in Beijing.