AD 2010-14-11: Bombardier, Inc. Model DHC-8-400 Series Airplanes

This AD applies to Bombardier, Inc. Model DHC-8-400, -401, and -402 airplanes, having serial numbers (S/Ns) 4001, 4003, 4004, 4006, and 4008 through 4227 inclusive, certificated in any category. Note 1: This AD requires revisions to certain operator maintenance documents to include new inspections. Compliance with these inspections is required by 14 CFR 91.403(c). For airplanes that have been previously modified, altered, or repaired in the areas addressed by these inspections, the operator may not be able to accomplish the inspections described in the revisions. In this situation, to comply with 14 CFR 91.403(c), the operator must request approval for an alternative method of compliance according to paragraph (j)(1) of this AD. The request should include a description of changes to the required inspections that will ensure the continued damage tolerance of the affected structure. The FAA has provided guidance for this determination in Advisory Circular (AC) 25.1529-1A.