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Sun, Oct 23, 2011

AD: Bombardier Regional Jets

AD NUMBER: 2011-21-0

MANUFACTURER: Bombardier, Inc. Airplanes
SUBJECT: Airworthiness Directive 2011-21-07
ACTION: Final rule

SUMMARY: The FAA is adopting a new airworthiness directive (AD) for Bombardier, Inc. Model CL-600-2B19 (Regional Jet Series 100 & 440); Model CL-600-2C10 (Regional Jet Series 700, 701, & 702); Model CL-600-2D15 (Regional Jet Series 705); and Model CL-600-2D24 (Regional Jet Series 900) airplanes.

This AD results from mandatory continuing airworthiness information (MCAI) issued by an airworthiness authority of another country to identify and correct an unsafe condition on an aviation product. The MCAI describes the unsafe condition as:

There have been several in-service reports of airspeed mismatch between the pilot and co-pilot's airspeed indicators. It was discovered that during or after heavy rain, the pitot-static tubing may become partially or completely blocked by water, which fails to enter the drain bottles. Investigation revealed that drain bottles used in the primary pitot-static system include check valves, which impede the entry of water into the drain bottle. This condition, if not corrected, may result in erroneous airspeed and altitude indications.

DATES: This AD becomes effective November 23, 2011.

FMI: AD

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