Document ID: chunk:federal_register_of_legislation:F2009L00690:body:0:p2
Version: federal_register_of_legislation:F2009L00690
Segment Type: other
Provision Reference: 
Character Range: 2807–6049

2 and 3 of this AD.

   If the visual inspection of the piston (p/n 46570-1/-3) threads and thread relief area for evidence of corrosion in accordance with RD 8/4-32-059 Rev. NC was performed without using borescope or 10X magnification mirror, a one time deferral for up to 500 landings is permissible to complete the inspection of the piston using borescope or 10X magnification mirror.

      4. Reporting Requirement - Applicable to DHC Models 400, 401 and 402, serial numbers 4001, 4003, 4004, 4006, and 4008 through 4208.

      Report any discrepancies found during any of the above inspections to the Bombardier Technical Help Desk.

      5. Modification of Main Landing Gear Retract Actuator - Applicable to DHC-8 Aircraft, Models 400, 401, and 402, Serial Numbers 4001, 4003, 4004, 4006, 4008 through 4182.

      Incorporate Bombardier Modsum 4-901603 to replace the affected retract actuator with a new design retract actuator, p/n 46550-13. Bombardier Service Bulletin (SB) 84-32-55, Revision A, dated 10 March 2008, or later revisions approved by the Chief, Continuing Airworthiness, Transport Canada provides approved instructions for incorporating Modsum 4-901603.

      Terminating Action 1.

      Incorporation of Modsum 4-901603 provides terminating action to the visual inspections detailed in Requirement 3 of this AD.

   Note 1:  Incorporation of Modsum 4-901603 in accordance with Revision NC of Bombardier SB 84-32-55, dated 14 January 2008, meets Requirement 5 of this AD.

   Note 2:  Incorporation of Modsum 4-901610 to replace the affected retract actuator with a new design retract actuator, p/n 46550-15, also satisfies Requirement 5 of this AD.

      6. Maintenance Requirement - Applicable to DHC-8 Aircraft, Models 400, 401, and 402, Serial Numbers 4001, 4003, 4004, 4006, 4008 through 4208.

      Amend the Transport Canada approved maintenance schedule by incorporating task numbers 320100-211 (Detailed Inspection of the Retraction Actuator Rod End Jam Nut, Gland Nut and Actuator Attachment Pins for Condition, Security of Installation and Corrosion) and 320100-212 (Restoration of the Retraction Actuator for Complete Overhaul) as introduced by the Temporary Revision (TR) MRB–35 of the DHC-8 Series 400 Maintenance Requirements Manual, PSM
      1-84-7.

                Terminating Action 2.

                Incorporation of maintenance task numbers 320100-211 and 320100-212 provides terminating action to the general visual inspections detailed in Requirement 2 of this AD.

             Ferry Flight:  Applicable to DHC-8 Aircraft, Models 400, 401, and 402, Serial Numbers 4001, 4003, 4004, 4006, 4008 through 4208.

             To permit the ferry of an aircraft to a location where the inspection requirements of this directive can be accomplished, adhere to the following procedures and limitations:

             Flight Crew Limitations and Procedures:

                A. Ferry Flight with gear extended and pinned.

                B. Landing to be conducted at a minimum descent rate.

                C. Minimize braking on landing.

                D. Flight to be conducted per Aircraft Operating Manual (AOM) Section 4.8.

                E. Essential crew