Cessna last month released class-A terrain awareness and warning system (TAWS) service bulletins covering installation of Honeywell’s EGPWS in a variety of Citation models spanning the 525 Citation CJ; 550 Bravo; 560 Ultra; and 550 Citation II. Cessna also announced that service bulletins for Sandel’s class-B TAWS will be available later this month for all Citation Model 500s in service.
The FAA has issued its final rule on the TAWS mandate. The rule goes into effect on March 29 next year and differentiates two classes of TAWS equipment required in turbine-powered airplanes. Class-A systems apply to all Part 121 and 135 operations with aircraft configured with at least 10 passenger seats. Class-B systems apply to all Part 91 operators of aircraft with six or more passenger seats, and to Part 135 operators with six to nine passenger seats.