Airworthiness directives › 2005-07-15
AD 2005-07-15 Airworthiness Directives; Bombardier Model CL-600-2B19 (Regional Jet Series 100 & 440) Airplanes
Applicability*9
This AD applies to Bombardier Model CL-600-2B19 (Regional Jet Series 100 and 440) airplanes; certified in any category; serial numbers 7003 through 7067 inclusive and 7069 through 7254 inclusive.
Compliance
You are responsible for having the actions required by this AD performed within the compliance times specified, unless the actions have already been done. Modify APU Cooling Air Exhaust (f) Within 2,000 flight hours after the effective date the AD, or within 16 months after the effective date of this AD, whichever occurs first: Modify the APU cooling air exhaust by doing all of the actions in the Accomplishment Instructions of Bombardier Service Bulletin 601R-49-015, dated November 6, 1998, except that submitting a comment sheet and a compliance sheet are not required by this AD. Note 1: Bombardier Service Bulletin 601R-49-015, dated November 6, 1998, refers to Avica Service Bulletin 10S145-49-01, dated July 15, 1998, and Canadair Kit Drawing K601R97150, Rev NC, as additional sources of service information for doing the modification. The Avica service bulletin and the Canadair Kit Drawing are included as Appendix A of the Bombardier service bulletin. Parts Installation (g) As of the effective date of this AD, no person may install an APU enclosure having Canadair part number (P/N) 601R97150-13, or Avica P/N 15A104-101, on any airplane, unless he unit has been modified in accordance with paragraph (f) of this AD. Alternative Methods of
Unsafe condition
This AD is prompted by reports of incomplete drainage of the Auxiliary Power Unit (APU) enclosure. We are issuing this D to prevent a negative pressure condition from developing in the APU enclosure when the APU is operating on the ground, which could create a potential fire hazard if flammable fluid leakage occurs inside the APU enclosure and cannot be drained overboard.
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The directive text above is reproduced from the Federal Register, a work of the United States government and in the public domain. The separation into applicability, compliance and required actions is TrackAD's.*1