### 14910-13-PI

DEPARTMENT OF TRA1'\'SPORTA nON Federal Aviation Administration 14 eFR 

### Part 39



### R1N2120-AA64 

### ::> (0' 

### 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 SVM L 

### AGENCY: Federal Aviation Administration (FAA), DepaI1ment ofTransportation (DOT). 

### ACTION: Finalrule.

.SUMMARY: We are adopting anewairworthiness directive (AD) fortheproducts list, above. This AD results from mandatory continuing airworthiness infon11ation (MeAT) IlA'I'~ 

### originated by an aviation authority ofanother 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 inChapter 525 ofthe Airworthiness Manual through Notice ofProposed Amendment (NPA) 2002-043. The identified non-compliances were assessed using Transpon Canada Policy Letter No. 525-001 to detemune ifmandatory corrective action was required. Tbe assessment showed that certain hydraulic system failure scenarios could lead to arapid overheat inthe 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 INI'I"I~U.'£IG U~T~
UTISG S,"",H'OL smAl.$SiG 

### ."

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llOL ~mAl.S"Sl(l OMI~14~1()-13-1'1 "}"'_""'''_~'J-; OL'-."M',"""''', ;\1--:(" _171 1l1']',\KrME-NT OJ'TRANSPORTATION

1-1CFR I';\rl 39 ,,,,,,,,'c,,,· ,." J\NI·-I7.i ,0
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, 70I. 8.:702) Airplanes, Modd CIAiOO-2D 15 (Regional Jet Series '/05) !\illJI<llH"~, <lndModel 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'-IllUllsafe 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 inChapter 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 Cllllldk"d 10a rapid overheat in thehydraulic till!;:S without giving !light crew sufficicllltimc to renel before Ihl.:No. I and No.2 hydrauiit: system , H".",'.";"'I, M-i:'·)11 

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