OPNLguy From , joined Dec 1969, posts, RR: Reply 1, posted (10 years 5 months 3 weeks 4 days 8 hours ago) and read 1055 times:
It's been about a zillion years (or maybe it just FEELS that way) since I was familiar with the similar Shorts 330 aircraft, but my guess would be that the aircraft pictured being refueled was at an airport that didn't have an operable ground power unit. This, the only electrical means of starting the aircraft was via an already running engine. Might also have been an aircraft-related problem, although it's been too long since my SD-330 experience to recall the specific possibilities...
Jetguy From , joined Dec 1969, posts, RR: Reply 2, posted (10 years 5 months 3 weeks 4 days 7 hours ago) and read 1038 times:
I would assume that they're flying multiple short flights by the "Sydney Sky Diving" logo on the airplane. Turbine engine maintenance is based on a combination of time and cycles. Keeping the engines running would reduce the start cycles on the Skyvan's engines. Is it a smart practice? Well, it's probably not one that I would endorse under normal conditions. Although it's a fairly common practice with helicopters.