(1) The mechanics work hard to keep the he-licopters airworthy.

(2) The planes were certified airworthy.

(3) Two of the T-Birds will be kept in airworthy condition for the Museo do Ar, flying on special occasions only.

(4) Spitfire restorations to airworthy status have notoriously exceeded initial estimates of timing and cost, irrespective of start point condition.

(5) An airworthy Catalina, PBY-5A N6108, was leased for use in the film and apparently flown to Hawaii.

(6) These smaller craft are enjoyably intimate and perfectly airworthy, but they have safety require-ments quite different from those of the high-flying behemoths.

(7) This wing could easily be returned to airworthy status by replacing the lower lines.

(8) The airplane is airworthy.

(9) The poor creature must have wondered what was going on, as it was already fully airworthy!

(10) Seven engine changes and numerous on-the-spot overhauls were accomplished to keep the aircraft airworthy.

(11) Too numerous to list here individually, most were of early-1980s, vintage and had not been airworthy for some time.

(12) Crews were even dispatched to determine if any of the aircraft could be made airworthy.

(13) But Boeing, which makes the Harpoon anti-ship missiles, has also produced more than half of China's commercial jets and ensures they stay airworthy with spare parts.

(14) But there was more nail-biting before the Manchester-built aircraft, Britain’s most potent nuclear deterrent during the Cold War, was declared airworthy by the Civil Aviation Authority.

(15) It is expected that the RAF Harrier T12s will be of particular interest to the USMC as potential airworthy aircraft to bolster its small twin-seater fleet.

(16) Into the wild blue yonder they go, strapped into aircraft that often have yet to be proven fully airworthy, and in so doing help push the boundaries of flight science.

(1) The mechanics work hard to keep the he-licopters airworthy.