Document ID: chunk:federal_register_of_legislation:F2006B08804:body:0:p1
Version: federal_register_of_legislation:F2006B08804
Segment Type: other
Provision Reference: 
Character Range: 4–3004

Douglas DC3 Series Aeroplanes

AIRWORTHINESS DIRECTIVE

    For the reasons set out in the background section, the CASA delegate whose signature appears below revokes Airworthiness Directive (AD) AD/DC3/29 Amdt 3 and issues the following AD under subregulation 39.1 (1) of CAR 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.

    AD/DC3/29
    Amdt 4

    Lower Centre Section Skin and Structure 7/2000

    Applicability: All models.

                 Requirement: 1. Visually inspect those parts of the front face of the wing front spar, the lower spar cap and lower wing skin and doublers accessible from within the main landing gear bay and through the access holes in the landing gear drag strut tunnels between approximately Wing Station (WS) 90 and WS 130.

                 2.    For aircraft which have not been modified with the repair or preventive doublers at both WS 94.25 and WS 127.75 in accordance with McDonnell Douglas (MD) Service Bulletin (SB) 229, any revision, or McDonnell Douglas Service Bulletin 263, any revision up to and including Revision 8, or McDonnell Douglas Service Rework Drawing (SRD) SR03578003:

               Note 1: Alternative designs of repair or preventive doublers are acceptable for the purposes of this AD only where they have been assessed and approved as at least equivalent to the above data, by the holder of an appropriate CAR 35 design authorisation.

                   1. Incorporate access holes in accordance with MD SRD03548001, Revision A;

               Note 2: Aircraft which have previously been modified to incorporate access holes, do not have to be re-modified provided that the necessary access and visibility can be obtained.

b.    Inspect the wing using the visual and radiographic procedures specified in MD SRD SR03578001 or MD SRD SR03578002 Revision A, whichever is applicable; and

               Note 3: Radiographic Technique DCA NCI/R/8 is an acceptable alternative procedure provided that for exposures 4 and 5 additional film is placed on the lower wing skin to inspect the lower spar between the drag strut fairing and the centre line of the nacelle.

c.    Modify the wing to incorporate wing skin doublers at both WS 94.25 and
                  127.75 in accordance with MD SRD SR03578003.
 COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY
 SCHEDULE OF AIRWORTHINESS DIRECTIVES

             3.    For aircraft which have been modified to incorporate wing skin doublers in accordance with SB 229, SB 263 and/or SRD SR03578003, inspect the wing