14910-1

DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

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R1N 2120-AA64

100 & 440) Airplanes

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Airworthiness Directives; Bombardier, Inc. Model CL-600-2BI9 (Regional Jet Serie ,W~

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ACTION: Final rule.

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

(Docket No. FAA-2009-1229; Directorate Identifier 2009-NM-I06-AD; Amendm

1047/ ;).OW-1--/-I I

39-*****; AD  -** -**1

(DOT).

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

A specific batch of nose landing gear (NLG) and NLG door selector

valves, part number (PIN) 60IR75l46-] (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 intemal leakage

within the valve. Subsequently, if electrical power is transferred or

removed [yom the aircraft before the NLG safety pin is installed, any

pressure, including residual pressure, in the NO.3 hydraulic system can

result in an unconunanded NLG retraction and/or uncommanded opening

of the NLG doors. There have been six cases reported on CL(-J600-1B19

aircraft, one ofwmch resulted in the collapse of the NLG at the departure

gate.

* * * * * * *

FAA Form 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) 60 IR75146-1 (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

of the NLG doors. There have been six ckscs reported on CL[- ]600-2B I9

aircraft, one of which resulted in the collapse of the 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 of Transportation

Fedcnll Aviation Administration

[Docket No. FAA-2009-1229; Directorate Identifier 2009-NM-106-ADj Amendment

39-*****; AD  -** -**1

14CFR Part 39

DEPARTMENT OF TRANSPORTATION

• • • • • • •
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

J 00 & 440) AirpI,mcs

AGENCY: Federal Aviation Administration (FAA). Department of Transportation

(DOT).

ACTION: Pinal rule.

SUMMAR'l': We me <1dopting H new <lirIVOr\hill(;ls~ directive (1\D) {hI' Lhe products listed

above. This AD results from lllundittory continuing airworthiness inforrnation (MeAl)

originated by an aviation authority of another country 10 identify 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) 60 IR75l46-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, if electrical POWt:f is 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 (111uncommundcd 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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