U.S. Marine Corps and Air Force V-22s began returning to the air in late February following replacement of faulty flight-control computer chips that grounded the fleet.
The tilt-rotors were grounded Feb. 6 after it was discovered that chips made by Texas Instruments may fail in temperatures of about 30F. The V-22 program office said the problem was found during pre-flight testing of a V-22 on a cold morning at the Bell/Boeing V-22 plant in Amarillo, Texas. The Osprey has three flight control computers, each of which backs up the others. The chip in question, which was used on the aircraft starting in 2003, is responsible for switching over to a back-up computer.