14910-13-Pj

Federal Aviation Administration

RIN 2120-AA64

described in the MeAL

condition as:

F'uts(:a

m""S"l"1lOL

~mus:;.o,;

.'C

F''l1N\ •• ""001.

SIl1~1..\ SIr.

e 0-

""IIIN'r

~ul'IIN<; ~"MIl{l1

-

,

~"",L.>.s~ ,,'r I" vIfl.\I f. • .

1;../ ~

,

jRO'''' •••••s,·••OOI.

"tll.U.SlI;

/

'/

l"11~~,sn",cn

'''I1'~'.s-S'"

." '0" \y:.",

IM"1~

1 21?-:)/c/'

~OIlTiNG,"'MIIOI

,,,,'I'I,,I_(.,IG

'An

ol-n,;(, SY"IlO~

,mussu,

".

:wr1""S'''OOl.

."I1''''I..'SII)

AT~

• • • • • • •

1>'-1

IDocket No. FAA-2009-**"'**; Directorate Identifier 2009-NM-119-AD)

The proposed AD would require actions that are intended to address the unsafe condition

information (MeAl) originated by an aviation authority of anather country to identify

listed above. This proposed AD results from mandatory continuing aif\vorthiness

Two cases of a crack on a ··dry'" ADO (Air Driven Generator)

(l1amilton Sundstrand pan number in the 761339 series) in the aft

area orthe strut and generator housing assembly. have been

reported on CL-600-2B I9 aircraft. The same pal1 number is also

installed on CL 600-2B 16 (CL-604) aircraft. Investigation

determined that the crack was in an area of the strut where the wall

thickness of the casting was below specification.. due to a

manufacturing anomaly in a specific batch of ADOs. Structural

failure and departure of the ADG during deployment could

possibly result in damage to the aircraft structure. If deployment

were activated by a dual engine shutdown, ADO structural failure

would also result in loss of hydraulics for the flight controls.

ACTION: Notice of proposed rulemaking (NPRM).

ACENCY: Federal Aviation Administration (FAA), DOT.

Airworthiness Directives; Bombardier Model CL-600~2B 16 (CL~604) Airplanes

and correct an unsafe condition on an aviation product. The MeAl desc-ribes the unsafe

DEPARTMENT OF TRANSPORT AnON

14 CFR Part 39

SUMMARY: We propose to adopt a new airworthiness directive (AD) for the products
14910-I3-PI

DEPARTMENT OF TRANSPORT AnON

Federal Aviation Administration

14eFR Part 39

(Docket No. FAA-l009-H""" .••.; Directorate Identifier 2009-NM-1l9-AD}

RIN 2120-AA64

Ain\lorthiness Directivesj Bombardier Model CLw600-2B16 (CL~604) Airplanes

AGENCY: FederaJ Aviation Administration (FAA), DOT.

ACTION: Notice of proposed rulemaking (NPRM).

SUMMARY: We propose to adopt a new 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 identify

and correct an unsafe condition on an aviation product. The MeAl describes the unsafe

condition as:

Two cases of a crack on a "dry" ADO (Air Driven Generator)

(Hamilton SUlldstrand part number in the 761339 series) in the an

area of the strut and generator housing assembly, have been

reported on CL-600-2B 19 aircraft. The same part number is also

installed on CL 600~2B 16 (CL-604) aircraft. Investigation

determined that the crack was in an area of the strut where the wall

thickness orthe casting was below specification, due to a

manufacturing anomaly in a specific batch of ADOs. Structural

failure and departure of the ADO during deployment could

possibly result in damage to the aircraft structure. If deployment

were activated by a dual engine shutdown, ADO structural failure

would also result in loss of hydraulics for the flight controls.

IW I. 'VMOOL

ANE-171

j~ITT"""""S"]

ANH71

kQuT'NI,i ."'''''1''

LUB-i\[G

IIA-Jf

, , , , , 11."1-

The proposed AD would require actions that are intended to address the unsafe condition

described in the MeAl.