(491D-13-P]

DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

) 4 CFR Part 39

2-.010 -0 2-2-C)

[Docket No. FAA-lOO9-*****; Directorate Identifier 2009-NM-llS-AD]

R1N 212D-AA64

Ainvorthiness Directives; Bombardier Model DHC-8-400. -401, and -402 Series

Airplanes

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Notice of proposed rulemaking (NPRM).

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

listed above. This proposed AD results from mandatory continuing amvorthiness

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

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

condition as:

Certain main landing gear components have experienced premature failure

during certification testing. Revision has been made to the DHC-8-400

Maintenance Requirements Manual, Airworthiness Limitation Items, to

incorporate the revised safe life limits for the main landing gear lock

actuator assembly, retraction actuator assembly rod end and piston, and

the upper bearing in the main landing gear shock strut assembly. Failure

of these components could adversely affect the structural integrity of the

main landing gear.

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The proposed AD would require actions that are intended to address the unsafe conditio ATE

described in the MeAl.

DATES: We must receive comments on this proposed AD by [insert date 4S days aller

date of publication in tbe FEDERAL REGISTER].

SYMBOL
DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR ParI 39

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ANE-171

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CYaies

II.

ANE-171

[Docket No. FAA-2009_xx***; Directorate Identifier 2009-NM-l IS-ADI

RIN 2120-AA64

ANE-171

Airworthiness Directives; Bombardier Model DHC-8-400, -401, and -402 Series

Airplanes

AGENCY: Federal Aviation Administration (FAA), DOT. ,~(lSVMIlOL

ANE-170

" INOS "00.

llQUlllCSV....:ll.

listed above. This proposed AD results from mandatory continuing airworthiness LGB-AEG

infonnation (MCAI) originated by an aviation authority of anothcr country to identify

ACTION: Notice of proposed rulemaking (NPRM).

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

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

condition as:

Certain main landing gear components have experienced premature failure

during certification testing. Revision has been made to the DHC-8AOO

Maintenance Requirements Manual, Airworthiness Limitation Items, to

incorporate the revised safe life limits for the main landing gear lock

actuator assembly, retraction actuator assembly rod end and piston, and

the upper bearing in the main landing gear shock strut assembly. Failure

of these components could adversely affect the structural integrity of the

main landing gear.

RO\JlINC SYMUOI.

'N'TIAlSl>H"

The proposed AD would require actions that are intended to address the unsafe condition ,.,,"~

described in the MCAL

DATES: We must receive comment') on this proposed AD by [insert date 45 days after

date of publication in the FEDERAL REGISTER].