Airworthiness directives › 2017-15-08
AD 2017-15-08 Airworthiness Directives; Bombardier, Inc., Airplanes
Applicability*9
This AD applies to Bombardier, Inc., Model CL-600-2E25 (Regional Jet Series 1000) airplanes, certificated in any category, serial numbers 19001 through 19048 inclusive.
Compliance
Comply with this AD within the compliance times specified, unless already done.
Required actions
At the earlier of the times specified in paragraphs (g)(1) and (g)(2) of this AD: Modify the bleed-air duct and detection system, in accordance with the Accomplishment Instructions of Bombardier Service Bulletin 670BA-36-022, Revision B, dated December 20, 2016. (1) Within 6,600 flight hours or 32 months, whichever occurs first after the effective date of this AD. (2) Within the next 10,000-flight-hours scheduled maintenance check after the effective date of this AD.
Unsafe condition
This AD was prompted by a report of a possibility that the shrouds of the high pressure bleed air ducts could deteriorate and their maximum permitted leakage rate could be exceeded. We are issuing this AD to prevent a bleed air leak from exceeding the maximum permitted leakage rate, which if not sensed by the detection system, could cause hot air impingement to damage the adjacent structure and system components or create a fire hazard.
Affected ADs
None.
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