Flyworthy

[…] formations were so decimated that, apart from the special air units stationed at Stalino and Makeyevka, the Germans stopped referring to their aircraft as part of a group or squadron, and classified them only as flyworthy or unflyworthy.

With two aircraft riddled with hits and no longer flyworthy, the balance four flights were called off.

Although seemingly complete, even to the non-aviator the craft was blatantly not fly-worthy as parts of the fuselage carried gaping holes.