Document ID: chunk:federal_register_of_legislation:F2006L01464:body:0:p2
Version: federal_register_of_legislation:F2006L01464
Segment Type: other
Provision Reference: 
Character Range: 3740–6526

2005, inspect the HP turbine disc within 500 cycles from
                     24 November.

                     (b) If the HP turbine disc cycles were less than 6150 cycles since new on
                     24 November 2005, inspect the disc by whichever is the soonest of the conditions below:

                        (i) Prior to reaching 6650 cycles since new.  The HP turbine disc life at inspection must be greater than 700 cycles since new.

                        (ii) At next shop visit where the HP turbine rotor is removed from the Combustor Outer Case and the HP turbine disc life is greater than 700 cycles since new.  If a HP turbine disc that meets these cyclic life criteria is currently at shop visit, and if, at the effective date of this Airworthiness Directive, it has not yet been reinstalled into the Combustion Outer Case, then the HP turbine disc must be inspected in accordance with the requirements of this Airworthiness Directive at the current shop visit.

                   2. For all discs listed in Table 2 that are fitted to RB211-524D4 engine mark variants:

                     (a) If the HP turbine disc cycles were greater than 5000 cycles since new on
                     24 November 2005, inspect the HP turbine disc within 500 cycles from
                     24 November 2005.

        (b) If the HP turbine disc cycles were less than 5000 cycles since new on
        24 November 2005, inspect the HP turbine disc by whichever is the soonest of the conditions below:

           (i) Prior to reaching 5500 cycles since new.  The HP turbine disc life at inspection must be greater than 700 cycles since new.

           (ii) At the next shop visit where the HP turbine rotor is removed from the Combustor Outer Case and the HP turbine disc life is greater than 700 cycles since new.  If a HP turbine disc that meets these cyclic life criteria is currently at shop visit, and if, at the effective date of this Airworthiness Directive, it has not yet been reinstalled into the Combustion Outer Case, then the HP turbine disc must be inspected in accordance with the requirements of this Airworthiness Directive at the current shop visit.

      3. For all other HP turbine discs specified in the Applicability of this Directive but not listed in Table 2 of this AD.

      Inspect the HP turbine disc at next shop visit where the HP turbine rotor is removed from the Combustor Outer Case and the HP turbine disc life is greater than 700 cycles since new.  If a HP turbine disc that meets these cyclic life criteria is currently at shop visit; and if, at the effective date of this Airworthiness Directive, it has not yet been reinstalled into the Combustion Outer Case, then the HP turbine disc must be inspected in accordance with