Document ID: chunk:federal_register_of_legislation:F2006L01464:body:0:p1
Version: federal_register_of_legislation:F2006L01464
Segment Type: other
Provision Reference: 
Character Range: 0–4018

AIRWORTHINESS DIRECTIVE
On the effective date specified below, and for the reasons set out in the background section, the CASA delegate whose signature appears below revokes Airworthiness Directive (AD) AD/RB211/35 Amdt 1 and issues the following AD under subregulation 39.001(1) of CASR 1998.  The AD requires that the action set out in the requirement section (being action that the delegate considers necessary to correct the unsafe condition) be taken in relation to the aircraft or aeronautical product mentioned in the applicability section: (a) in the circumstances mentioned in the requirement section; and (b) in accordance with the instructions set out in the requirement section; and (c) at the time mentioned in the compliance section.

Rolls Royce Turbine Engines - RB211 Series
AD/RB211/35 Amdt 2  High Pressure Turbine  7/2006 DM

Applicability:  Rolls Royce Model RB211-524 series engines, all marks, installed on Boeing 747 and 767 and Lockheed L1011 aeroplanes fitted with High Pressure (HP) Turbine discs only listed in Table 1 of this AD.

                Table 1: Applicable HP Turbine Discs.
                Part No   Serial No. to  Serial No.
                FK24651   LAQDY6061                  Single Disc
                FK24651   LDRCZ10453                 LDRCZ10720 (INCLUSIVE)
                FK24651   LQDY9903                   Single Disc
                FK24651   LQDY9924                   Single Disc
                FK24790   CRCZ6                      CRCZ25 (INCLUSIVE)
                FK24790   LDRCZ10717                 LDRCZ14022 (INCLUSIVE)
                UL23166   LQDY6516                   LQDY8718 (INCLUSIVE)
                UL24561   LQDY6389                   LQDY6438 (INCLUSIVE)
                UL24994   LQDY6405                   LQDY8727 (INCLUSIVE)
                UL29472   LAQDY6013                  LAQDY6092 (INCLUSIVE)
                UL29472   LDRCZ10029                 LDRCZ10821 (INCLUSIVE)
                UL29472   LDRCZ6000                  LDRCZ6060 (INCLUSIVE)
                UL29472   LQDY6592                   LQDY9993 (INCLUSIVE)
                UL29473   CRCZ24                     CRCZ25 (INCLUSIVE)
                UL29473   CZ12135                    CZ12333 (INCLUSIVE)
                UL29473   LAQDY6010                  LAQDY6088 (INCLUSIVE)
                UL29473   LDRCZ10003                 LDRCZ15372 (INCLUSIVE)
                UL29473   LDRCZ6001                  LDRCZ9995 (INCLUSIVE)
                UL29473   LQDY10001                  Single Disc
                UL29473   LQDY9606                   LQDY9989 (INCLUSIVE)

                This AD does not apply to HP turbine discs, which are pre modification Service Bulletin (SB) 72-7730, post modification SB72-C109 or post modification
                SB72-C762.
Requirement:    Carry out an eddy current inspection of the HP turbine disc in accordance with Section 3 - Accomplishment instructions of Rolls Royce NMSB 72-AE718 original issue or later EASA approved revision.

                If a HP turbine disc has previously passed the inspection to Rolls-Royce NMSB
                72-C816 or the focussed inspection carried out in accordance with Rolls-Royce TS594-J Overhaul Process Manual Task 70-00-00-200-223 at greater than 700 cycles since new, then either of these inspections meets the requirements of this AD.

                Note:  UK CAA AD G-2006-0002 EASA approval No. 2006-0034 dated 25 January 2006 refers.
Compliance:        1. For all discs listed in Table 2 that are fitted to RB211-524 engine marks except RB211-524D4 variants:

                     (a) If the HP turbine disc cycles were greater than 6150 cycles since new on
                     24 November 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