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DATE

Federal Aviation Administration

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

RIN 2120-AA64

DEPARTMENT OF TRANSPORT AnON

IDocket No. FAA-2009-1227j Directorate Identifier 2009-NM-119-AD; Amendment .flIl1l'«;SYM"Ol.

Ib3LJ7 1L1-02.- -1/1

39-*****; AD 2010- "'-"'*] INITIM.SJSIG

14 CFR Part 39

Ainvorthiness Directives; Bombardier, Inc. M0del CL-600-2B16 (CL-604 Variant)

Airplanes

(DOT).

ACTION: Final rule.

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above. This AD results from mandatory continuing airworthiness information (MeAl

originated by an aviation authority of another corntry to identify and correct an uusafe

condition on an aviation product. The MeAl derribes the unsafe condition as:

Two cases of a crack on a "dry" AD~ [air driven generator]

(Hamilton Sundstrand part number in the 761339 series), in the aft

area of the strut and generator housidg 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 ofthe casting was below specification, due to a

manufacturing anomaly in a specific batch of ADGs. 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, ADG structural failure

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

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

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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

(Docket No. FAA-2009-1227; Directorate Identifier 2009-NM-119-AD; Amendment

39~*****; AD 2016-**-**)

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ACTION: Final rule.

above. This AD results from mandatory continuing airworthiness infonnation (MCAI)

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

Airplanes

RIN 2120-AA64

(DOT).

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

Airworthiness Directives; Bombardier, Inc. Model CL-600-2BI6 (CL~604 Variant)

originated by an aviation authority of another country to identify and correct an unsafe

condition on an aviation product. The MCAI describes the unsafe condition as:

Two cases of a crack on a "dry" AD~ [air driven generator]

(Hamilton Sundstrand part number inlthe 761339 series), in the aft

area of the strut and generator housing assembly, have been

reported on CL-600-2B19 aircraft. The same part number is also

installed on CL-600-2BI6 (CL-604) aircraft. Investigation

detennined that the crack was in an area of the strut where the wa1l

thickness of the casting was below specificatio~ due to a

manufacturing anomaly in a specific batch of ADGs. 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. ADG structurel failure

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

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• • * • • * •