Lorika Bless

Oliver is a brand-new jet built for speed. But when a tiny sensor glitch grounds him from the High Lanes, he's sent on the Milk Run - delivering supplies to grass strips, mountain plateaus, and coastal islands that the fast jets never bother to visit. Guided by Radar, a grumpy retired headset with forty years of stories, Oliver discovers something the Stratosphere Club will never know: the world looks completely different when you're low enough to actually see it.
And when a fog rolls in and four hikers are stranded on a cliff face, only one plane knows the way through. For curious readers. Includes a full Pilot's Dictionary.