14910-1 

### DEPARTMENT OFTRANSPORTATION Federal AviationAdministration 14CFR Part 39 """'-lIfG SV"-' • 

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100&440) Airplanes 

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## Kf'/M - b Airworthiness Directives; Bombardier, Inc. Model CL-600-2BI9 (Regional Jet Serie

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ACTION: Final rule. AGENCY: Federal Aviation Administration (FAA), Department ofTransportation (Docket No. FAA-2009-1229; Directorate Identifier 2009-NM-I06-AD; Amendm 

# 1047/ ;).OW-1--/-I I 39-*****; AD 

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(DOT).
SUMMARY: We are adopting anew airworthiness directive (AD) fortheproducts lis 

### e(f'''''''''''MA1Uf\! ahove. This AD results from mandatory continuing airworthiness information (MeAl) originaLed 

### by an aviation 

### authority of another country to identify and correct an unsafe 

### condition on an aviation product. The MCAI dLcribes the unsafe condition as: Aspecific batch ofnose landing gear (NLG) and NLG door selector valves, part number (PIN) 

### 60IR75l46-] (Kaiser Fluid Technologies PIN 

### 750006000), may have hadtheir end caps incorrectly lock-wired and/or incorrectly torqued during assembly. This condition can lead tothe end cap backing off, with consequent damage to aseal and intemal leakage within thevalve. Subsequently, 

### ifelectrical power istransferred or removed [yom 

### the aircraft before the NLG 

### safety pin is installed, any pressure, including residual pressure, inthe NO.3 hydraulic system can result inanunconunanded NLG 

### retraction and/or uncommanded opening oftheNLG doors. There have been six cases reported on CL(-J600-1B19 aircraft, one ofwmch resulted inthe collapse ofthe NLG atthe departure gate. 

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FAAForm 1360·14.1 (6·89) OFFICIAL FILE COPY •.U.S.GPClo'1f9O.O-1llll-o, 2120'0'14910-13-PI

above. This AD results from mandatory continuing aif\.vorthiness information 

### (MeAl) . ~ originated by an aviation authority of another country to identify and 

### concel an unsafe mru.'-'iI:i'O A.Gallo 100 & 440) Ai'l'lanes

condition on an aviation product. The MeAl de~cribes the unsafe condition as: A specific batch oruose landing gear (NLG) and NLG door selector valves, part number 

### (pIN) 60IR75146-1 (Kaiser Fluid Technologies PIN 750006000), may have had their end caps incorrectly lock-wired and/or incorrectly torqued during assembly. This condition can lead to the end cap backing off, with consequent damage to a seal and intemalleakagc within the valve. Subsequently, ifeleclrical power is transferred or removed frol111he aircraft before the NLG safety pin is installed, any pressure, including residual pressure, in

### fhe No.3 hydroulic system can result in an llllcommanded NLG retractidn and/or 11l1commanded opening ofthe NLG doors. There have been six ckscs reported on CL[- ]600-2B I9 aircraft, one of which resulted in the collapse ofthe NLG at the departure gate. ACTION: Final rule. (DOT). RIN 2120-AA64 Airworthiness Directivesj Bombardier, Inc. Model CL-600-2B 19 (Regional Jet Series

SUMMARY: We are adopting a new airworthiness directive (AD) for the products listed AGENCY: Federal Aviation Administration (FAA), Department ofTransportation Fedcnll Aviation Administration [Docket No. FAA-2009-1229; Directorate Identifier 2009-NM-106-ADj Amendment 39-*****; AD 

##  -** -**1 14CFR Part 39 DEPARTMENT OFTRANSPORTATION



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# • • •14910-13-1'1 nEPARTMENT OF TRANSPORTATION Federal Aviation Administration 14 CFR Part 39 lOockct No. FAA-2009-l229j DiI'C,ctOi'l11c Identifier 2009-NM-106-AD; AUltlltlmcnt 39-***"'*; AD ****-*"'-**1 lHN 2120-AA64 Airworthiness Directives; Bombardier, Inc. Model CL-600-2B 19(Regional Jet Series J00 &440) AirpI,mcs AGENCY: Federal Aviation Administration (FAA). Department ofTransportation (DOT). ACTION: Pinal rule. SUMMAR'l': We me <1dopting Hnew <lirIVOr\hill(;ls~ directive (1\D) {hI' Lheproducts listed above. This AD results from lllundittory continuing airworthiness inforrnation (MeAl) originated by an aviation authority of another country 10identify and con-eel an unsafe condition on nn nvialion product. The MeAl describes the unsafe condition as: A specific batch ofnosc landing gC::Il" (NLG) and NLO door ;;elt:::ctor valves, pflrt l1111nbcr (PIN) 60IR75l46-j (Kaiser Fh,lid Technologies PIN 750006000), may have had lheir cnd caps incorrectly Jock-wired 'IndIoI' incorrectly torq\led during assembly, This condition can lend to the end cap backing oIT,with consequent damage to a sC:111lnd internal leakage within the valve, Subsequently, ifelectrical POWt:fis transferred or removed from the aircraft befon: the NLO s,llcty pin is installed, any pTessurc, including residufll pressure, inlhelNo. J hydruulic system Clln result in (111

uncommundcd NLG rclrueliol1 [wel/or tl11eommnndcd opening of tile NLG doors. Theft: have been six cases n:JlOrlcd on CL[~J600·2B 19 aircraft, one ofwhieh resulted in the collapse oftlLc NLG lit the departure gale. 

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