Document ID: chunk:federal_register_of_legislation:F2017L01119:body:0:p2
Version: federal_register_of_legislation:F2017L01119
Segment Type: other
Provision Reference: 
Character Range: 2656–4459

three (3) calendar years, whichever occurs first. Thereafter, re-inspect at every 1000 hours or three calendar year intervals whichever occurs first, or
                   For fittings with more than 1000 hours or 3 years accumulated time in service at the commencement date of this AD, conduct an initial inspection within 220 hours or 12 months, whichever occurs first, after the commencement date of this AD. Thereafter, re-inspect at every 1000 hours or three calendar year intervals whichever comes first.

             Note 3:  The initial and repeat inspection interval is the same as the Current Supplemental Inspection Documents (SIDS) inspection interval in Cessna Model 401/402 Supplemental inspection Number 57-10-27. This AD may be accomplished at the same time as the SIDS inspection.

             Figure A.
             This AD commences on 31 August 2017.
Background:  This Airworthiness Directive was issued because a Cessna 402C aircraft was found to have an approximately 4 inch crack extending from the inboard end of the fitting. The fitting was a J&R Aerospace (non-OEM) fitting with a time since new of 2831 hours. However, it was not possible to determine when this crack actually started. Further laboratory analysis of the failed fitting revealed that the material and process used to manufacture the fitting renders the fitting more susceptible to stress corrosion cracking in service.
             This AD requires an initial and repetitive visual inspection of J&R manufactured wing fittings. The initial and repeat inspection intervals have been chosen to align with current SIDS inspection interval for this area - Refer: Cessna Model 401/402 Supplemental inspection Number 57-10-27.

Christopher De Luis
Delegate of the Civil Aviation Safety Authority
29 August 2017