Airworthiness Directive · Amendment 39-18069 · Flight controls
Bombardier, Inc. Airplanes
This AD applies to the Bombardier, Inc. airplanes, certificated in any category, identified in paragraphs (c)(1) and (c)(2) of this AD.
(1) Model CL-215-6B11 (CL-215T Variant) airplanes, serial numbers 1056 through 1125 inclusive.
(2) Model CL-215-6B11 (CL-415 Variant) airplanes, serial numbers 2001 through 2990 inclusive.
We are adopting a new airworthiness directive (AD) for certain Bombardier, Inc. Model CL-215-6B11 (CL-215T Variant), and CL-215-6B11 (CL-415 Variant) airplanes. This AD was prompted by a report that, during a routine inspection, corrosion was discovered on the lower bearing of the rudder upper torque tube. This AD requires applying grease to the bearing; doing a general visual inspection of the expelled old grease for any contaminants, metal wear, and indication of corrosion, and replacing the bearing if necessary; and revising the maintenance or inspection program, as applicable, to incorporate the rudder spring tab operational test and a check of the rudder spring tab operation into the daily inspection. We are issuing this AD to prevent corroded bearings, which could result in a partial or total loss of axial support.
Within 3 months after the effective date of this AD, apply grease to the bearing, and do a general visual inspection of the expelled old grease for any contaminants (i.e. ashes, dust, and algae), metal wear, and indication of corrosion, in accordance with the Accomplishment Instructions of Bombardier Alert Service Bulletin 215-A3171, Revision 1, dated January 25, 2012 (for Model CL-215-6B11 (CL-215T Variant) airplanes); or Bombardier Alert Service Bulletin 215-A4452, Revision 1, dated January 3, 2012 (for Model CL-215-6B11 (CL-415 Variant) airplanes). If any contaminants (i.e., ashes, dust, and algae), metal wear, or indication of corrosion are found, before further flight, replace the bearing with a new bearing, in accordance with the Accomplishment Instructions of Bombardier Alert Service Bulletin 215-A3171, Revision 1, dated January 25, 2012 (for Model CL-215-6B11 (CL-215T Variant) airplanes); or Bombardier Alert Service Bulletin 215-A4452, Revision 1, dated January 3, 2012 (for Model CL-215-6B11 (CL-415 Variant) airplanes). Repeat the inspection, thereafter, before and after each fire season or at intervals not to exceed 6 months, whichever occurs first.
Note 1 to paragraph (g) of this AD: It is suggested that paragraph (g) of this AD be carried out in conjunction with AD 2009-05-04, Amendment 39-15828 (74 FR 8860, February 27, 2009), as the task and task intervals are in the same general area.
Within 30 days after the effective date of this AD: Revise the maintenance or inspection program, as applicable, to incorporate the rudder spring tab operational test, in accordance with the Accomplishment Instructions of Bombardier Alert Service Bulletin 215-A3171, Revision 1, dated January 25, 2012 (for Model CL-215-6B11 (CL-215T Variant) airplanes); or Bombardier Alert Service Bulletin 215-A4452, Revision 1, dated January 3, 2012 (for Model CL-215-6B11 (CL-415 Variant) airplanes).
Within 30 days after the effective date of this AD: Revise the maintenance or inspection program, as applicable, to incorporate a check of the rudder spring tab operation into the daily inspection, in accordance with the Accomplishment Instructions of Bombardier Alert Service Bulletin 215-A3171, Revision 1, dated January 25, 2012 (for Model CL-215-6B11 (CL-215T Variant) airplanes); or Bombardier Alert Service Bulletin 215-A4452, Revision 1, dated January 3, 2012 (for Model CL-215-6B11 (CL-415 Variant) airplanes).
After accomplishment of the maintenance or inspection program revision required by paragraphs (h) and (i) of this AD, no alternative actions (e.g., inspections) or intervals may be used unless the actions or intervals are approved as an alternative method of compliance (AMOC) in accordance with the procedures specified in paragraph (k)(1) of this AD.
