Whoever write this slow-news-day space filler clearly has no idea about operating aircraft and the fact that they need very regular servicing. To have only one quarter of the fleet off line for maintenance actually represents quite good availability. Maybe this chap thinks that running Apaches and Wokkas is like running a 1982 Cortina - do nothing all year, then pour the oil down a drain and give it a spot of welding the day before the MOT. Chimp.