O~CURRE~CE'; ~OUTINGSYMBOL

'''lnALSlSlG 

# C~ o.~ 

# III' II [491O-I3-Pj

RlN 2120-AA64
AGENCY: Federal Aviation Administration (FAA), DOT. DEPARTMENT OF TRANSPORTATION Federal Aviation Administration

Ainvorthiness Directives; Bombardier, Inc. Model DHC-8-400 Series Airplanes

listed above. This proposed AD results from mandatory continuing airwor1hiness OImNG YM"O'- 14CFR Part 39 

# O't"Y:P

?-O{/- fDocket No. FAA_mtf-''dd<Hj Directorate Identifier 2010-NM-230-AD]

ACTION: Notice ofproposed rulemaking (NPRM). SUMMARY: We propose to adopt anew airworthiness directive (AD) for theprod V'l11

information (MeAl) originated byan aviation authority ofanother country to identi 'lTIAl5ISIG and correct an w1safe condition on anaviation product. The MeAl describes the UDS -"E condition as: RO\fTINGSH'"OL Bombardier Aerospace has completed asystem safety review ofthe aeroplanes fuel system against fuel tank safety standards introduced in Chapter 525 ofthe Airworthiness Manual through Notice ofProposed Amendment (NPA) 2002-043 [which corresponds with the FAA's Special Federal Aviation Regulation (SFAR) 88]. The identified non-compliances were then assessed using Transport Canada Policy Letter No. 525-001, to determine ifmandatory corrective action isrequired. The assessment showed that anumber ofmodifications to the fuel system are required to mitigate unsafe conditions that could result inpotential ignition source within the fuel system. DATE

ROUl1~GSY"FJOL

ROUTING SYMBOL

DATE The proposed AD would require actions that are intended to address the unsafe condi ion described inthe MCAI. OATES: We must receive comments onthis proposed AD by [INSERT DATE 4514910-13-]')

DEPARTMENT OF TRANSPORTA nON Federal Aviation Administration 14CFR Part 39 [Docket No. FAA-2010-*"'***; Directorate Identifier 2010-NM-230-AD] RlN 2120-AA64 Ainvorthincss Directives; Bombardier, Inc. Model DHC-8-400 Series Airplanes AGENCY: Federal Aviation Administration (FAA), DOT. ACTION: Notice of proposed rulemaking (NPRM). SUMMARY: We propose to adopt anew airworthiness directive (AD) for the products listed above. This proposed AD results from mandatory continuing airworthiness information (MeAl) originated by an aviation authority of another country to identi fy and COlTcct an unsafe condition on an aviation product. The MeAl describes the unsafe condition as: Bombardier Aerospace has completed a system safety revie\v of the aeroplanes fuel system against fuel tank safety standards introduced in Chapter 525 or the Aif\vorthiness Manual through Notice of Proposed Amendment (NPA) 2002-043 [which corresponds with the FAA '5 Special Federal Aviation Regulation (SFAR) 88]. -nlC identified non-compliances were then assessed using Tnmsport Canada Policy Letter No. 525-001, to determine ifmandatory corrective fiction is required. The assessment shov,ied that anumber of modifications to the fuel system are required to mitigate unsafe conditions that could result in potential ignition source within the fuel system.
The proposed AD would require actions that are intended to address the unsafe condition described In the MeAl. .OH"C "'-""'01. ANE-17" ',"'ttAI.',.''''; J.[)~ 

# ;'; (1(/0 ""lim'G <'-""'0,- ANE·I:i3

"'!\rt,~(; ""nul. I\NE·I'I

~,.,'n"c:~y"RC". LGlh\[li "m.".''''(' R.\l,"""

'~'Tl·\I ..

"S'(, 

### -"(j"',~">".""'"[4910-13-P]

DEPARTMENT OF TRANSPORT AnON Federal Aviation Administration 14CFR Part 39 !Docket No. FAA-2010-***,aj Directorate Identifier lOlO-NM-230-ADJ RIN 2120-AA64 Airworthiness Directives; Bombardier, Inc. Model DHC-8-400 Series Airplanes AGENCY: Federal Aviation Administration (FAA), DOT. ACTION: Notice ofproposed rulemaking (NPRM). SUl\1MARY: Wepropose to adopt anew airworthiness directive (AD) forthe products listed above. This proposed ADresults frommandatory continuing airworthiness information (MeAl) originated byanaviation authority ofanother country to identify andcorrect anunsafe condition on anaviation product. The MeAl describes theunsafe condition as: Bombardier Aerospace has completed asystem safety review ofthe aeroplanes fuel system against 

### fuel tank safety standards introduced in Chapter 525 ofthe Airworthiness Manual through Notice ofProposed Amendment (NPA) 2002-043 [which corresponds with the FAA's Special Federal Aviation Regulation (SFAR) 88]. The identified non-compliances were then assessed using Transport Canada Policy Letter No. 525-00I, to determine ifmandatory corrective action isrequired. The assessment showed that anumber ofmodifications to thefuel system arerequired to mitigate unsafe conditions that could result inpotential ignition source within the fuel system. CONCURl<DIC£S ROIJTlJ<a S\'l.IIlOL AN&173



# - K. Dowling



# =~ ANE-171 

## ~,= D. ParriUo

INlTIALSlS,G

lMTE

IHrTlALSlSIO

The proposed AD would require actions that are intended to address theunsafe condition described inthe MCAl.