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Tue, Nov 11, 2003

AD: Bombardier CL-600

AD NUMBER: 2003-22-12

MANUFACTURER: Bombardier
SUBJECT: Airworthiness Directive 2003-22-12

SUMMARY: This amendment adopts a new airworthiness directive (AD), applicable to certain Bombardier Model CL-600-1A11 (CL-600), CL-600-2A12 (CL-601), and CL-600-2B16 (CL-601-3A, CL-601-3R, and CL-604) series airplanes. This amendment requires revising the airplane flight manual toprovide the flight crew with procedures and limitations for operating the airplane with out-oftoleranceangle of attack (AOA) transducers. This amendment also requires, among other actions, measuring the vane angles and voltage of the AOA transducers; reworking the AOA transducer assemblies; repetitive measurements of the resistance of both AOA transducers; andfollow-on and corrective actions, as applicable. This action is necessary to prevent flat spots onthe potentiometers of the AOA transducers due to wear, which may cause a delay in the commands for stall warning, stick shaker, and stick pusher operation. This action is intended to address the identified unsafe condition.

FMI: http://ftp.atp.com/ADs/pdf/032212.pdf


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