Was ich vor vier Tagen vermutete, stellt sich überraschend schnell als zutreffend heraus:

They are short of the knowhow for operating the intelligence and technical systems of the 10 Heron drones purchased from Israel since they expelled the Israeli technicians operating and keeping them in order last year.

The “technical problems” grounding the Herons Israel sold Ankara have crippled the Turkish army’s campaign against the Kurdish PKK rebels – both in northern Iraq and in southeast Turkey.
In recent days, therefore, the rebels have stepped up their raids on Turkish territory, killing nine people including army and police personnel.

Quelle: DEBKA