Airworthiness Directive · Amendment 39-13920 · Bombardier Model CL-215-6B11 (CL215T Variant) and CL-215-6B11 (CL415 Variant) Series Airplanes
Bombardier Model CL-215-6B11 (CL215T Variant) and CL-215-6B11 (CL415 Variant) Series Airplanes
This AD applies to Bombardier Model CL-215-6B11 (CL215T variant) series airplanes, having serial numbers (S/N) 1056 through 1125 inclusive, and Model CL-215-6B11 (CL415 variant) series airplanes having S/Ns 2001 through 2053 inclusive; certificated in any category.
The FAA is adopting a new airworthiness directive (AD) for certain Bombardier Model CL-215-6B11 (CL215T variant) and CL-215-6B11 (CL415 variant) series airplanes. This AD requires replacing the mounting pad studs of the auxiliary feather pump with new, longer studs, and installing a pressure relief valve. This AD is prompted by a few incidents of external oil leaks from the oil pump of the power control unit due to a malfunction of the pressure regulating valve. We are issuing this AD to prevent fracturing of the pump body, which could result in loss of engine oil, and consequent inability to maintain engine oil pressure and to feather the propeller.
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 12 months after the effective date of this AD, replace the mounting pad studs of the auxiliary feather pump with new, longer studs, and install a pressure relief valve; in accordance with the Accomplishment Instructions of Bombardier Service Bulletin 215-3108, dated March 28, 2001 (for Model CL-215-6B11 (CL215T variant) series airplanes); or Bombardier Service Bulletin 215-4234, dated March 28, 2001 (for Model CL-215-6B11 (CL415 variant) series airplanes); as applicable.
Note 1: Bombardier Service Bulletin 215-3108 and Bombardier Service Bulletin 215-4234 refer to Pratt & Whitney Canada Service Bulletin PW100-72-21636, Revision 2, dated June 26, 2002, as an additional source of service information for accomplishing the replacement of the mounting pad studs.
Although the service bulletin refers to a reporting requirement in paragraph 2.B, that reporting is not required by 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.
