31 July 2011 C1 CIVIL AVIATION DEPARTMENT HONG KONG ...

not require further analysis of the results.2.2 A task may be acceptable for Limited Authorisation, but the associatedfunctional test may be more complex. For example, replacement of a pressureswitch on an engine could be considered a Limited Authorisation task but therequired low power ground run to check for leaks would not. In suchcircumstances the requirement to complete the task in accordance with theapproved airworthiness data and issue a Certificate of Release to Servicecannot be met. However, the low power ground run, to check for leaks, can becarried out by operational flight crews with the Limited Authorisation holdercompleting the task by personally seeing the effects of the ground run and issuea Certificate of Release to Service for the completed task as required byHKAR145.50(a).3 Limited AuthorisationsNon LWTR Maintenance personnel3.1 Paragraph 2.2.2 of Appendix No.4 to Airworthiness Notice No.14 introducesthe concept of 'Line Maintenance Certifying Mechanic' (LMCM) that is aLimited Authorisation intended for issue to maintenance personnel who do nothold a HKAR-AMEL LWTR. This Limited Authorisation is task specificalthough authorised personnel may hold multiple authorised tasks on one ormore aircraft types.3.2 With effect from 1 April 2002, previously unapproved 'Line MaintenanceCertifying Mechanic' schemes will need to meet the requirements of HKAR-66.This requires the applicant to hold a HKAR-66 Category A AircraftMaintenance Licence in the appropriate basic category. Existing schemes maycontinue as agreed with the Director-General until 1 April 2004. Thereafter,schemes for the issue of such authorisations will need to have been amended toreflect the full requirements of HKAR-66 for Category A certifying staff. Theprocedures associated with such authorisations will need to be submitted to theDirector-General for approval.NOTE: Existing schemes may not be eligible for the transfer of privileges under theprovision of 'protected rights' in accordance with HKAR-66 until such times as theDirector-General can be satisfied that the basis for qualification representsequivalence to that provided for by HKAR-66 Category A.3.3 Limited authorisations, when granted in accordance with this LMCM concept,will permit the holder to issue a Certificate of Release to Service followingminor scheduled line maintenance and defect rectification for those tasks listedin the authorisation. Minor scheduled line maintenance is limited to checks upto daily inspections. It is important to note that the rectification of any defectsrevealed during the course of such scheduled line maintenance may not fallwithin the certification authorisation privileges of the individual.3.4 Holders of Limited Authorisations issued in accordance with this paragraphwill not be permitted to defer defects.AN-14 A5 P.331 January 2002