14910-13-PI

DEPARTMENT OF TRA1'\'SPORTA nON

Federal Aviation Administration

14 eFR Part 39

R1N 2120-AA64

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Airworthiness Directives; Bombardier, rilC. Model CL-600-2ClO (Regional Jet Series "OU-'ING~Y"'lO~

-100

700,701, & 702) Airplanes, Model CL-600·2DlS (Regional Jet Series 705) Airplanes,

and Model CL-600-2D24 (Regional Jet Series 900) Airplanes

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AGENCY: Federal Aviation Administration (FAA), DepaI1ment of Transportation

(DOT).

ACTION: Final rule.

. SUMMARY: We are adopting a new airworthiness directive (AD) for the products list,

above. This AD results from mandatory continuing airworthiness infon11ation (MeAT) IlA'I'~

originated by an aviation authority of another country to identify and COlTeel an unsafe b~"''''''IN'''''SY'''''''''''---

condition on all aviation product. The MeAl describes the unsafe condition as:

Bombardier Aerospace has completed a system safety review orthe

CL-600-2ClO/CL600-2D15ICL-600~2D24 aircraft fuel syslem against the

new fuel tank safety standards, introduced in Chapter 525 of the

Airworthiness Manual through Notice of Proposed Amendment (NPA)

2002-043. The identified non-compliances were assessed using Transpon

Canada Policy Letter No. 525-001 to detemune if mandatory corrective

action was required.

Tbe assessment showed that certain hydraulic system failure scenarios

could lead to a rapid overheat in the hydraulic lines without giving flight

crew sufficient time to react before the NO.1 and NO.2 hydraulic system

tubing inside the fuel tank reaches the fuel auto ignition temperature. This

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lDnckcl No. FAA·2009-0792; Dircctorate ItlcntiriCI' 2009-NM-1J57wAO; ..\II'wllt!nH.'nt

rUN 1110-AA64

Aln\'orthillcss Hin'{:livcs; RlHnb(mlier. Inc.lvlodd CL-600-2C10 l!{egiol1nl .leI Sl.'rie~

700, 70 I. 8.: 702) Airplanes, Modd CIAiOO-2D 15 (Regional Jet Series '/05) !\illJI<llH"~,

<lnd Model CL-600-2024 (Regional Jet Series 900) Airplanes

AGENCY: Fcdcrrll Aviation Administration (FAA). Department nfTranspnrwlioll

(DOT).

ACTION: Final rule.

above. This AD results from mandmory colllinuing airworthiness information ~iviCAI)

origin;tll.;t1 by :In :lvi,,[ ion authori ty of another cOlllllry 10 identify mill COlTCCI'-Ill Ullsafe

ct,lndition nn an avi,llioll pmdllcl. The MeAl describes the umaJ'c cOl1dition as:

Bomb:Lrdi..:r Aerospace ha!: completed <Isystem surety rcviL:w Oflhc

CL-6UO-2C IO/CLGOO-2DI5/CL-600-1D24 aircrall fuel !iystl'm :1gainsllhc

lit.:\\'fud tank safety stalldmds. introduced in Chapter 525 vflhc

!\irworthiucss Mmmallhrough Notice OfPlllpos..:d Amclldlllt:1l1iN!',\)

'200'1-U43. rhe idclllifit'd nnnwcomplianecs wcre assessed using Tra\l.~pnrl

ClIIl,-ldaPulley Lelter No. 525-001 lo dcterminll ifl11tlmhllory cOlTc('li\'c

m;liu]l was requirt:d.

Tilt: asscssrm:ll1 showed that ccrtaill hydraulic system luilurc sl:cnarios

Cllllld k"d 10 a rapid overheat in the hydraulic till!;:Swithout giving !light

crew sufficicllltimc to renel before Ihl.:No. I and No.2 hydrauiit: system

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