21. There were one-to three-hour delays Thursday along the 3, 500-kilometer ( 2, 175-mile ) ICE system . 22. The ICE system is a polycentric network. 23. The C-130 rescue plane underwent equipment outages on its rescue flight, including its anti-icing system and its weather radar. 24. After the accident, the ATR installed bigger de-icing systems , pneumatic " boots " that inflate to break off ice. 25. With this revision, the intake de-icing using an integrated de-icing system was proven in the winter months of 1960. 26. These tests established that the de-icing system worked well for the small droplets specified in the American icing standards. 27. After engine start the crew activated the anti-ice systems of the engines, but the wing anti-ice systems were not activated. 28. After engine start the crew activated the anti-ice systems of the engines, but the wing anti-ice systems were not activated. 29. The airline's hub in Chicago flies ATR's almost exclusively and has not had trouble with the anti-icing system , he said. 30. The first prototype was later used by Napier & Son at Luton for trials of the firm's inflight de-icing systems .
