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## 6fto 10 1111;«; S'" IlOL DATE Federal Aviation Administration

AGENCY: Federal Aviation Administration (FAA), Department ofTransportation 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 14CFR 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 ofanother corntry to identify and correct an uusafe condition on an aviation product. The MeAl derribes the unsafe condition as:

Two cases of acrack on a "dry" AD~ [air driven generator] (Hamilton Sundstrand part number in the 761339 series), in the aft area ofthe 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 ofthe strut where the wall thickness ofthe casting was below specification, due to a manufacturing anomaly in a specific batch ofADGs. Structural failure and departure ofthe ADG during deployment could possibly result in damage to the aircraft structure. Ifdeployment were activated by adual engine shutdown, ADG structural failure would also result in loss ofhydraulics forthe flight controls. SUMMARY: We are adopting a new airworthiness directive (AD) for the products lisle .0 1>'0 sn'BOLrn•• cuuENCt,.'; (4910-13-P) ~~~~~•• tIOI. DEPARTMENT OF TRANSPORTATION Federal Aviation Administration 14CFR Part 39 (Docket No. FAA-2009-1227; Directorate Identifier 2009-NM-119-AD; Amendment 39~*****; AD 2016-**-**) R l' YMBm. ANE·171 

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ACTION: Final rule. above. This AD results from mandatory continuing airworthiness infonnation (MCAI) AGENCY: Federal Aviation Administration (FAA), Department ofTransportation Airplanes RIN 2120-AA64
(DOT). SUMMARY: We are adopting anew airworthiness directive (AD) forthe products listed A Airworthiness Directives; Bombardier, Inc. Model CL-600-2BI6 (CL~604Variant)

originated by an aviation authority ofanother country to identify and correct an unsafe condition on an aviation product. The MCAI describes the unsafe condition as:

Two cases ofacrack on a "dry" AD~ [airdriven generator] (Hamilton Sundstrand part number inlthe 761339 series), inthe aft area ofthe 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 inan area ofthe strut where the wa1l thickness ofthe casting was below specificatio~ due to a manufacturing anomaly ina specific batch ofADGs. Structural failure and departure ofthe ADG during deployment could possibly result in damage tothe aircraft structure. Ifdeployment were activated by adual engine shutdown. ADG structurel failure would also result in loss ofhydraulics forthe flight controls. OlOUTINl:;;''''UOL



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