### Airplanes

14 CFR Part 39 14910-13-Pj DEPARTMENT OF TRANSPORTATION Federal Aviation Administration



# 09 ':/1 (Docket No. FAA-2010-*****; Directorate Identifier 20] O-NM-119-AD] RlN 2120-AA64 Airwortbiness Directives; Bombardier, Inc. Model BD-700-1 Al0 and 80-700-1 

### A11

AGENCY: Federal Aviation Administration (FAA), DOT. ACTION: Notice ofproposed rulemaking

# (1RM).
~UMMARY: ~e propose to adoptanew ailofthiness dire~tive(A~) fort~eproduct hsted above. ThIs proposed AD results from mandatory contmumg auworthmess infonnation (MeAl) originated byan aviation LthoritY of another country to identify



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### and correct an unsafe condition on an aviation product. The MeAl 

### describes the unsafe INlTL"~' •. >,,;; 

### condition as: There have been hvo in-service reports

# efmain landing gear (l\1LG) 

### tire failure on landing, during which aflailipg tire tread caused damage to NO.2 and NO.3 hydraulic system lines linthe wing auxiliary spar area 011 

### the left side ofthe aircraft. Tills damagy resulted in the Joss ofsupply pressure to the inboard and outboard br~kes, as the only remaining braking source available \:Vas

the NO.3 hydraulip system accumulator. The degradation ofthe brake system performance could adversely affect the aircraft during landing. ROUTING -'YMI)(lL

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DATE
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### * 

## * * * * 

## * * DATE

,OUTING "·MI)(lL 

### The unsafe condition is loss ofbrakiJlg capability, which could reduce the ability ofthe 

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### flightcrew to safely land tbe airplane. The proPlosedAD would require actions that are OAT~ 

### intended to address the unsafe condition described inthe MeAl.- 14910-J3-P] 

### l=~""'''''~"-' 1tOl.'IDlCo ''''''110I. LCiB-AEG I)EPARTM F:NTOF TRANSI'ORT ATION
Federal Aviation Administration 14CFR Part 39 IDocket No. FAA-2010-**"'**; Directorate Identifier 2010-NM-119-ADJ RIN 2120-AA64

" ••YUllI)<. ANE-171 Ainvonbinc.ss Directives; Bombardier, Inc. Model DD-700-1AJ 0 and BD-700-1All Airplanes AGENCY: Federal Aviation Administration (FAA), DOT. ACTION: Notice ofproposed-rule making (NPRM). SUMMARY: We propose to adopt anew airworthiness directive (AD) for the products_ listed above. Tbis proposed AD results from mandatory continuing airwonhincss information (MeAl) originated byan aviation authorily of another country to identify and correct an unsafe cOlJdition on an aviation product. The MeAl describes the unsafe condition as: There have been two in-service reports of~nain landing, gear (MLG) tire failure on landing,.duting which af1ailingltire tread caused dwnage to NO.2 andNo.3 hydraulic system lines inthewing auxiliary spar areaun the left:side ofthe'aircraft: Tlus damage resulted in the loss of supply pressure Lothe inboard.and olltboard brakes, as the only remaining braking source available was the NO.3 hydraulic system accumulator. The degradation ofthebiake system performance could adversely affecl the aircran during landing. 

### ..,1.""'"••••""I. ANE-171

DA'rP.

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# • • 

# • • • • The unsafe condition is loss ofbraking capability. which could reduce the ability ofthe •.•. m flightcrew to safely land the.airplane. The proposed AD would require actions that are intended to address the w1safe condition described inthe MeAl.