sentences:  At Jaisalmer AFS, a Gripen would undertake the hot weather trials and also a dummy run and bomb drop at the Pokhran Firing Range.The other Gripen headed towards Leh, would perform high altitude tests involving landing, refueling and restarting engines.Prior to the Gripen, 4 out of the 5 aircraft had issues restarting their engines during trials conducted in Leh.