The phrase "a good airplane" is correct and usable in written English.
You can use it when describing the quality or performance of an airplane, typically in a context discussing travel, aviation, or aircraft specifications.
Example: "After researching various models, I concluded that the Boeing 737 is a good airplane for short-haul flights."
Alternatives: "a reliable aircraft" or "an excellent plane."
All I want now, from a good airplane book, is transport.
It could make for a good airplane companion as well. .
The Wind was running on battery power for this test, too, so it'd definitely make a good airplane companion.
The Michael Crichton novel Airframe described the incident in detail as an example to the reader how a "good airplane" could be "destroyed by bad press".
The station commander, Brigadier General Henry Arnold reported that Walker, "supposed to be one of our best pilots, apparently cuts out completely, uses up 4000 feet and finally hits a concrete block and spoils a perfectly good airplane when he normally would have given her the gun and gone around again".
We just read all the way through her new Rolling Stone interview — in which she gets the bottoms of her feet tattooed, drinks booze underage in a club, cusses nearly nonstop and jumps out of a perfectly good airplane — and the impression we're left with is a distinct "meh".
"I left my hotel room this morning to jump out of a perfectly good airplane, and saw part of a man standing in the hallway.
It felt a lot like jumping out of a perfectly good airplane.
Those who would never jump out of a perfectly good airplane might enjoy the Spa Lovers Experience, like a massage with sparkling wine and a Roman bath at the Hard Rock Las Vegas for $99 or a massage and facial plus a meal at New York City's Eden Day Spa for $69.
Note that the verbal aspect of the word JUMPING (i.e., the part that acts like a verb) takes the adverbial prepositional phrase modifier, out of a perfectly good airplane.
In less than five minutes, a perfectly good airplane went from cruising at 32,000 feet to hitting the ocean.
