{"id":"F2006B06828","name":"AD/SD3-30/27 Amdt 1 - Wing Strut Distance Piece and Adjacent Side Plates Corrosion","slug":"ad-sd3-30-27-amdt-1-wing-strut-distance-piece-and-adjacent-side-plates-corrosion","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":114692,"registerId":"commonwealth-F2006B06828-current","compilationNumber":null,"startDate":"2026-04-03","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/SD3-30/27 Amdt 1 - Wing Strut Distance Piece and Adjacent Side Plates Corrosion","content":"COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 \\- 105 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n![](image.001.png)  \nShort SD3-30 Series Aeroplanes\n\nAD/SD3-30/27\n\nAmdt 1\n\nApplicability: All Models.\n\n  \n\nWing Strut Distance Piece and Adjacent Side Plates Corrosion\n\n  \n9/93\n\nRequirement: Action in accordance with Shorts Mandatory SB SD330-53-65 Revision 1.\n\nNote: Accomplishment of SB SD330-53-66 constitutes terminating action for the inspections required by SB SD330-53-65 R1.\n\nCompliance: a. Unless the inspection of both the distance piece and adjacent side plates has already been accomplished, within 30 days after 19 August 1993.\n\nb. Reinspect reworked distance pieces and/or side plates at intervals not to exceed 600 hours time in service or 3 months, whichever occurs first.\n\nBackground: Corrosion had been detected on the horizontal leg of the distance piece during non routine maintenance. Amendment 1 is issued to reflect a revision of the Requirement Document which introduces an inspection of the side plates in addition to the distance piece, and a repeat inspection of any reworked parts.","sortOrder":0}],"analysis":{"flash_summary":{"complexity_score":4,"scope_assessment":{"changed":true,"description":"Amendment 1 expanded the scope of inspection from the distance piece alone to include adjacent side plates and introduced mandatory repeat inspections for any reworked parts. The Background states this change reflects a revision of the Requirement Document to add side‑plate inspections and repeat inspections (Background; Requirement; Compliance b)."},"complexity_factors":["Applicability: broad — 'All Models' means the entire SD3-30 fleet is affected (Applicability).","External-document dependency: mandatory compliance with Shorts Mandatory SB SD330-53-65 Revision 1 (Requirement), and a separate SB (SD330-53-66) can provide terminating action (Note).","Multiple deadlines and intervals: initial inspection within 30 days after 19 August 1993 (Compliance a); recurrent inspections of reworked parts every 600 hours TIS or 3 months (Compliance b).","Technical maintenance burden: inspections and any rework/repairs are hands-on maintenance tasks likely to require certified personnel and shop time (Requirement / Background).","Operational scheduling and record-keeping: fleet operators must schedule short-deadline inspections and ongoing recurrent checks, creating administrative overhead (Compliance a/b).","Limited regulator discretion: AD specifies mandatory actions and intervals; operators' practical choice is whether to perform recurrent inspections or pursue the terminating SB (Requirement / Note).","Implementation risk: corrosion found during non‑routine maintenance prompted the change, so undetected corrosion between checks presents safety and operational risk (Background)."],"plain_english_summary":"This Airworthiness Directive requires operators of Short SD3-30 series aeroplanes to inspect the wing strut distance piece and the adjacent side plates for corrosion in accordance with Shorts Mandatory SB SD330-53-65 Revision 1, and to reinspect any reworked parts at set intervals (600 hours or 3 months). It matters because corrosion was detected during maintenance and the rule sets mandatory inspection timing and an optional terminating action via SB SD330-53-66."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is Amendment 1 to an existing Airworthiness Directive. The amendment modestly expands the original scope by adding inspection requirements for adjacent side plates (previously only the distance piece was covered) and introducing repeat inspection intervals for reworked parts. This represents a targeted safety expansion rather than mission creep—the directive remains focused on the specific corrosion issue in the wing strut assembly."},"complexity_factors":["Very short document (approximately 200 words)","Only 2 defined compliance deadlines (30 days and 600 hours/3 months)","Single cross-reference to manufacturer service bulletin (SB SD330-53-65 R1)","One conditional exception (terminating action via SB SD330-53-66)","No nested definitions or interpretive sections","Straightforward applicability (all models of one aircraft type)"],"plain_english_summary":"This Airworthiness Directive requires operators of Short SD3‑30 aircraft to inspect the wing strut \"distance piece\" and adjacent side plates for corrosion, following Shorts Mandatory Service Bulletin SD330‑53‑65 Rev 1. Initial inspections were required within 30 days of 19 Aug 1993; repaired or replaced parts must be re‑inspected every 600 flight hours or 3 months, whichever is first.\n\nCompleting Service Bulletin SD330‑53‑66 is an optional terminating action that eliminates the repeat inspection requirement. The AD addresses discovered corrosion that could compromise structural safety."}},"importantCases":[],"_links":{"self":"/api/acts/ad-sd3-30-27-amdt-1-wing-strut-distance-piece-and-adjacent-side-plates-corrosion","history":"/api/acts/ad-sd3-30-27-amdt-1-wing-strut-distance-piece-and-adjacent-side-plates-corrosion/history","analysis":"/api/acts/ad-sd3-30-27-amdt-1-wing-strut-distance-piece-and-adjacent-side-plates-corrosion/analysis","conflicts":"/api/acts/ad-sd3-30-27-amdt-1-wing-strut-distance-piece-and-adjacent-side-plates-corrosion/conflicts","importantCases":"/api/acts/ad-sd3-30-27-amdt-1-wing-strut-distance-piece-and-adjacent-side-plates-corrosion/important-cases","documents":"/api/acts/ad-sd3-30-27-amdt-1-wing-strut-distance-piece-and-adjacent-side-plates-corrosion/documents"}}