Document ID: chunk:federal_register_of_legislation:F2020L00555:body:0:p2
Version: federal_register_of_legislation:F2020L00555
Segment Type: other
Provision Reference: 
Character Range: 2937–7810

Compressor Rotor Wheel Position Number:
                CAC23900                                          1, 2, 3 & 4                              CAC15280     1

                Table 1 (Continued)
                Module S/N:  Compressor Rotor Wheel Position Number:  Module S/N:  Compressor Rotor Wheel Position Number:
                CAC30243     1                                        CAC15850     1 & 4
                CAC30972     1                                        CAC15973     1 & 4
                CAC31261F    1                                        CAC28209     3 & 4
                CAC31394     To be advised (TBA).
                CAC32128     2, 3 & 4
                CAC33247     1 & 6
                CAC33931     1 & 2
                CAC34205     TBA.
                CAC35463     4
                CAC36132     2, 3, 4, & 6
                CAC37795     1
                CAC37814     1, 2, 3, 4 & 5
                CAC37978     1
                CAC38521     TBA.
                CAC39053     TBA.
                CAC40090     1
                CAC40093     1
                CAC40446     TBA.
                CAC40483     TBA.
                CAC40560     1 & 5
                CAC41262     1
                CAC41846     TBA.
                CAC41917     1
                CAC42465     1 & 4
                CAC43498     1 & 5

                Table 2: Affected C18, C28, C30 and C47 compressor modules.
                Affected Compressor Module Serial Numbers (S/N):
                C18 series                                        C28 series  C30 series  C47 series
                CAC21705B                                         CAC28017    CAC28046    CAC44094
                                                                  CAC28022    CAC90011    CAC44293
                                                                  CAC28048    CAC90052    CAC44294
                                                                  CAC28119    CAC90069    CAC45072
                                                                  CAC70026    CAC90507    CAC45750
                                                                  CAC70243    CAC90719
                                                                  CAC70779    CAC91119
                                                                              CAC91305
                                                                              CAC91311
                                                                              CAC91507

                Table 2 (Continued)
                C18 series  C28 series  C30 series  C47 series
                                        CAC91607
                                        CAC91623
                                        CAC91635
                                        CAC91820
                                        CAC98516
                                        CAC98537

Compliance:        1. Before further flight.
                   2. For C20B and C20R series compressor modules: Before further flight.
                   3. For C18, C28, C30 and C47 series compressor modules: the earlier of the following:
                     (i)  within 50 hours' time in service;
                     (ii)  12 April 2020;
                     (iii) next engine shop visit.
                     (iv) for C47 compressor module Serial Number CAC44094, within 50 hours' time in service or 4 June 2020.
                   4. Before returning to service.
                   5. Before returning to service.
                 For aircraft located away from a maintenance facility, a special flight permit may be issued for one non-revenue ferry flight to return the aircraft to the nearest maintenance facility to carry out the requirements of this AD.
                 CASA is to be notified of any engines found to have an affected module fitted via the Defect Reporting Service.
                Note 1: Civil Aviation Authority of New Zealand (CAA NZ) Airworthiness Directive DCA/AL250/60A has been referenced as a source document for Tables 1 and 2.
                Note 2: The primary safety concern with C18, C28, C30 and C47 series compressor modules relates to unauthorised drilling of compressor impellers for balancing.
                Note 3: The primary safety concern with C20B and C20R series compressor modules relates to blending repairs on compressor rotor wheels with the lack of shot peening.
                This AD commences on 8 May 2020.
Background:     A recent audit of a New Zealand maintenance organisation by CAA NZ has determined that compressor module inspections and repairs of these modules may not have been carried out in accordance with approved Rolls-Royce procedures.

   Amendment 1 adds the C18 series compressor module, introduces additional serial numbers to each module series and makes