Airworthiness Directive · Amendment 39-14039 · Bombardier Model CL-600-2B19 (Regional Jet Series 100 & 440) Airplanes
Bombardier Model CL-600-2B19 (Regional Jet Series 100 & 440) Airplanes
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.
The FAA is adopting a new airworthiness directive (AD) for certain Bombardier Model CL-600-2B19 (Regional Jet Series 100 and 440) airplanes. This AD requires modification of the Auxiliary Power Unit (APU) cooling air exhaust. This AD is prompted by reports of incomplete drainage of the APU enclosure. We are issuing this AD 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 liquid leakage occurs inside the APU enclosure and cannot be drained overboard.
You are responsible for having the actions required by this AD performed within the compliance times specified, unless the actions have already been done.
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.
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.
The aircraft, engines and makers this AD names, by the model designations in its text. A model listed here may still be outside the AD's serial ranges.
