DALLAS, 21 Jan. 2009 REVUE THOMMEN AG won a contract to provide its AD20 2-inch electronic standby altimeter as a retrofit option for the fleet of Bombardier Challenger 601-3A/3R and 604 aircraft. The AD20 is the first electronic standby altimeter in the industry per RTCA DO-178B designed with software level A required for installation in a Part 25 jet aircraft, THOMMEN officials say.
Bombardier selected the THOMMEN AD20 in order to offer customers enhanced features not available with mechanical standby altimeters, as well as improved reliability, Thommen officials say. This improvement is part of Bombardier's on-going engagement to enhance its out-of-production aircraft.
The THOMMEN AD20 standby altimeter provides a dedicated digital liquid crystal display (LCD), analog pointer, and also features high intensity backlighting for daylight conditions. The altitude can be displayed in both lmperial Format (inHg-ft or hPa- ft) as well as Metric Format (hPa- m) and it also allows operation at lower barometric settings (20.67 inHg). The built-in-test (BlT) ensures normal operation with each power on.
Operators can install the new altimeter by incorporating Bombardier's Optional Service Bulletin (SB) 604-34-056 and SB 601-0595 and available on Bombardier Customer Services' Business Aircraft website (www.cic.bombardier.com).
REVUE THOMMEN AG, based in Waldenburg, Switzerland, is a manufacturer of aircraft instruments and air data systems used worldwide on a full range of aircraft types from helicopters to corporate aircraft and commercial airliners.
