Document ID: chunk:federal_register_of_legislation:F2006L01029:body:0:p2
Version: federal_register_of_legislation:F2006L01029
Segment Type: other
Provision Reference: 
Character Range: 2857–5851

amber advisory lights out.

        11. Items 9 and 10 may be repeated in an effort to achieve 3 gear down and locked.

              CAUTION

      Should the LDG GEAR INOP caution light illuminate, or loss of no. 2 hydraulic system pressure or quantity, or any abnormality in landing gear system indication other than those associated with the affected main landing gear be experienced, see paragraph 4.21.1 ALTERNATE LANDING GEAR EXTENSION.

        (b) Upon replacing both left and right main landing gear up-lock assemblies with P/N 46500-7 up-lock assemblies, remove the procedures mandated in Requirement 1 of this AD above from the AFM. Advise all flight crews of this change.

      2. Replace main landing gear up-lock assemblies, P/N 46500 3, with new or overhauled P/N 46500-3, P/N 46500-5 or P/N 46500-7 up-lock assemblies, as per instructions given in Chapter 32-31-21 of the DHC-8 Series 400 Aircraft Maintenance Manual, PSM 1 84 2.

      3. Inspect the up-lock roller of the left and right main landing gear for the presence of an inner low friction liner, in accordance with the Accomplishment Instructions of Bombardier Alert Service Bulletin (ASB) A84 32 15, dated
      4 February 2002, or later revisions approved by Transport Canada, and replace up-lock rollers that do not have an inner low friction liner with new rollers, P/N 46575 1.(/p2)

      4. Inspection of P/N 46500-5 Up-lock Assemblies:

        (a) Inspect the surface of the up-lock latch lower jaw for the presence of a wear groove and measure the wear groove depth to a 0.001 inch accuracy in accordance with DHC-8 Series 400 Aircraft Maintenance Manual, PSM 1 84 2, Task 32-31-21-220-801.  If the groove depth exceeds 0.007 inches, replace the up-lock assembly with a new or overhauled P/N 46500-7 up-lock assembly as per instructions given in Chapter 32-31-21 of the DHC-8 Series 400 Aircraft Maintenance Manual, PSM 1-84-2.

        (b) Inspect the up-lock roller, P/N 46575-1, to ensure that it rotates freely.  If the up-lock roller does not rotate freely, replace the up-lock roller with a roller of the same part number, as per instructions given in Chapter 32 31-21 of the DHC-8 Series 400 Aircraft Maintenance Manual, PSM 1-84-2.

                  Terminating Action.

                Replacement of both left and right up-lock assemblies with P/N 46500-7 up-lock assemblies terminates the actions required by this AD.

             Note:  TC AD CF-2002-13R2 refers.
Compliance:       1. (a) Within 30 days after the effective date of this AD, unless previously accomplished.

                  1. (b) Upon replacing both left and right main landing gear up-lock assemblies with P/N 46500-7 up-lock assemblies.

                2. Initially, before the up-lock assembly accumulates 2500 hours air time or 3000 flight cycles, whichever occurs first, thereafter at intervals not exceeding 2500 hours air time or 3000 flight cycles, whichever occurs first.

                3. Within