“We take any breach of our safety standards seriously and have acted swiftly to enhance mandatory drug screening across our active pilots.”

The detained pilot faces the death penalty on conviction in Indonesia.

Results of his urine test came back positive for meth, MDMA and cocaine, according to Indonesian customs officials.

Malaysia Aviation Group has said he was not the one who flew the plane from Kuala Lumpur that day, but a cockpit “observer” who had been “off duty for two days preceding the incident”.

It added that the aircraft “was operated safely at all times by two qualified operating pilots”.

AFP