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Sun, Feb 13, 2011

AD: Bombardier

AD NUMBER: 2011-04-02

MANUFACTURER: Bombardier, Inc. Model CL-215-1A10 (CL-215), CL-215-6B11 (CL-215T Variant), and CL-215-6B11 (CL-415 Variant) Airplanes
SUBJECT: Airworthiness Directive 2011-04-02

SUMMARY: This AD results from mandatory continuing airworthiness information (MCAI) originated by an aviation authority of another country to identify and correct an unsafe condition on an aviation product. The MCAI describes the unsafe condition as:
Seven cases of on-ground hydraulic accumulator screw cap or end cap failure have been experienced resulting in loss of the associated hydraulic system and high-energy impact damage to adjacent systems and structure.

A detailed analysis of the systems and structure in the potential line of trajectory of a failed screw cap/end cap for each accumulator has been conducted. It has identified that the worst-case scenarios would be impact damage to various components, potentially resulting in fuel spillage, uncommanded flap movement, or loss of aileron control [and consequent reduced controllability of the airplane].

FMI: http://rgl.faa.gov/Regulatory_and_Guidance_Library/rgAD.nsf/0/433486EF18D4DB88862578300053B16A?OpenDocument

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