Bootneck - you just don't get it - a SAR flight needs its engineering effort all the time, 24/7 because the aircraft and crew are always on call and any unserviceabilities that affect the operational capability of the aircraft need to be fixed straight away, day or night. We hold RS 15 0800 to 2200 and RS 45 2200 to 0800 so more work does get done at night (our engineers work 12 hour shifts now) but they are rarely idle during the day.