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DEPARTMENT OF TRANSPORTATION Nl"\JIlJl.E.~CE5

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14 CFR ParI 39

Federal Aviation Administration

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IDocket No. FAA-2010-*****j Directorate Identifier 2010-NM-151-ADj

R1N 2120-AA64

Airworthiness Directivesj Bombardier, Inc. Model CL-215-1 A 10 (eL-2IS),

CL-2IS-6B II (CL-2IST Van ant), and CL-2IS1-6BII (CL-4IS Variant) Airplanes

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Notice of proposed mlemaking (NPRM).

SUMMARY: We propose to adopt a new airworthiness directive (AD) for the product

listed above. This proposed AD results from mandatory continuing airworthiness

information (MeAl) originated byan aviation authority of another country to identify

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A detailed analysis of the systems and stmcture 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,

unconunanded flap movement, or loss of aileron control [and consequent

reduced controllability of the airplane].

Seven cases of on-ground hydraulic accumulator screw C<:lP or cod cap

failure have been experienced * * *, rdulting in loss of the associated

hydraulic system and high-energy impJct damage to adjacent systems and

structure. * * *

and con-eet an unsare condition on an aviation product. The MeAl describes the unsafe 'NI11~'..s,SH.i

condition as:
DEPARTM E.NT OF TRANSPORTATION

Federal A\'iation Administration

14 CFR Part 39

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(Docket No. FAA-2010~1c***",; Dircctoratc Idcntifier 2010-NM-1S1-AD)

RIN 2120·AA64

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condition as:

listed above. 111is proposed AD results from mandatory continuing airv.·orthiness

Airworthincss Directives; Bombardier, Inc. Model CL-215-1A10 (eL-2IS),

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information (MeAl) originated by an aviation authority of another country to identify

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 identilicd that the worst~¢ase scenarios would be impact

damage to various components, potentiallYlresulting in fuelspillagc,

uncommanded Dap movement, or loss of aileron control [and consequent

reduced controllability ofthc airplane] .

Seven cases of on-ground hydraulic accun~ulator screw cap or end cap

failure have been experienced >l< >jO >10, resultlng ill Joss of the associated

hydraulic system and high-energy impact damage to adjacent systems and

structure. '" '" of<

ACTION: Notice of proposed rulemaking (NPRM).

and correct an unsafe condition on an aviation product. The MeAl describes the unsafe

SUMMARY: We propose to adopt a new airworthiness directive (AD) for the products

CL-215-6B 11 (CL-21ST Valiant), and CL·215-6B II (CL~415 Variant) Airplanes

AGENCY: Federal Aviation Administration (FAA), DOT.

• • • • • • •