{"id":"F2015L00108","name":"AD/DH 60/10 - Inspection of Wooden Structure","slug":"ad-dh-60-10-inspection-of-wooden-structure","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":92679,"registerId":"commonwealth-F2015L00108-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"de Havilland DH 60 (Moth) Series Aeropla","sectionType":"division","heading":"de Havilland DH 60 (Moth) Series Aeroplanes","content":"### de Havilland DH 60 (Moth) Series Aeroplanes\n\n| AD/DH 60/10 | Inspection of Wooden Structure | 3/2015 |\n| ----------- | ------------------------------ | ------ |\n\n| Applicability: | This AD applies to all variants of DH 60 aircraft. |\n| -------------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Definitions: | In this AD:DHSL means de Havilland Support Ltd.TNS means DHSL Technical News Sheet CT (Moth) No. 32, Issue 3, dated 1 December 2008. |\n| Requirement: | For all aircraft:1. Suspend all aerobatic flight.2. Unless previously accomplished:(a) install all inspection rings and drainage provisions in accordance with the provisions of Figure 3 of Appendix G of the TNS;(b) gain access to the internal structure by removing all ‘pop-in’ panels, or otherwise cut away the fabric from inside inspection rings to facilitate access to the entire internal wooden structure;(c) perform a detailed inspection of the internal wooden structure in accordance with the inspection criteria provided at Appendix B, paragraph 6 ‘Inspection Content’ and take into consideration Appendix F, page F1, paragraph 2 ‘DH60 Series Wooden Structure – Areas for Specific Inspections’ of the TNS;(d) remove all unserviceable wooden structure from service, or conduct repairs in accordance with approved data.3. Report all defects discovered to CASA via the Service Difficulty Reporting System. |\n| Compliance: | 1. The action in Requirement 1 must be taken within 2 weeks of the effective date of this AD. Aerobatic flight can only recommence once the airworthiness of the wooden structure of the wings and empennage has been established in accordance with Requirement 2 of this AD. |\n\n| | 2. The actions in Requirement 2 must be taken:(a) for aircraft used for commercial purposes as prescribed in regulation 206 of the Civil Aviation Regulations 1988 (CAR 1988) – within two months of the effective date of this AD;(b) for all other aircraft – by the end of 31 December 2015. |\n| ----------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| | The actions in Requirement 2 must be repeated at the earlier of the following:(i) every 200 hours;(ii) within 36 months of the previous inspection;(iii) in the event of a ground strike, birdstrike or any other wing strike of sufficient magnitude to leave witness marks on the fabric covering, or otherwise obvious damage to a wing. In the case of such an event, both the top and bottom wings are to be inspected on the side of the aircraft where the impact occurred.3. The action in Requirement 3 must be taken in accordance with Part 4B – Defect Reporting of CAR 1988. |\n| | The effective date of this AD is 6 February 2015. |\n| Background: | This AD will mandate the requirement to conduct visual inspections of the entire internal wooden structure of the aircraft’s flying surfaces to ensure the continued airworthiness of all variants of DH 60 aircraft. |\n\n![](image.001.png) \nNicholas Ward \nDelegate of the Civil Aviation Safety Authority\n\n2 February 2015","sortOrder":0},{"sectionNumber":"AD/DH 60/10","sectionType":"part","heading":"AD/DH 60/10","content":"## AD/DH 60/10","sortOrder":1},{"sectionNumber":"Inspection of Wooden Structure","sectionType":"part","heading":"Inspection of Wooden Structure","content":"## Inspection of Wooden Structure","sortOrder":2},{"sectionNumber":"3/2015","sectionType":"part","heading":"3/2015","content":"## 3/2015","sortOrder":3}],"analysis":{"flash_summary_failed":{"failed":true,"reason":"A positive credit balance is required for all requests, including BYOK, so fallback providers remain available. Add credits at https://vercel.com/d?to=%2F%5Bteam%5D%2F%7E%2Fai%3Fmodal%3Dtop-up to continue.","source":"analysis-cron"},"flash_summary":{"complexity_score":4,"scope_assessment":{"changed":false,"description":"The AD's scope aligns with its stated purpose to mandate visual inspections of the entire internal wooden structure of DH 60 flying surfaces (Background; Applicability). It does not expand beyond all variants of DH 60 and sets procedural, timing and reporting requirements rather than adding new types of regulated activity; obligations fall on owners/operators and maintenance organisations as specified (Requirement; Compliance)."},"complexity_factors":["Applies to all variants of DH 60 (broad applicability increases affected stakeholders) (Applicability)","Multiple distinct actions: suspend aerobatics, install hardware, gain internal access, inspect, repair/remove, and report (Requirement 1–4)","References external technical documents (de Havilland Support Ltd TNS and multiple appendices) for inspection criteria and installation details (Definitions; Requirement 2(a),(c))","Differential deadlines: shorter compliance for commercial operations (CAR 1988 reg 206) versus private owners, plus a fixed calendar deadline (Compliance)","Recurring inspection regime with alternative triggers (every 200 hours, 36 months, or after specified strike events) creates operational scheduling and record-keeping obligations (Compliance)","Regulatory cross-references for defect reporting and commercial definitions (CAR 1988 Part 4B; reg 206) increase compliance steps and potential administrative burden (Compliance; Requirement 3)"],"plain_english_summary":"This AD requires owners and operators of all de Havilland DH 60 (Moth) variants to suspend aerobatic flight and carry out mandatory installations (inspection rings/drainage), detailed inspections and any necessary repairs of the internal wooden wing and empennage structures, and to report defects to CASA. (Applicability; Requirement; Requirement 3)\n\nIt prescribes short-term deadlines and staged timelines—earlier for commercial aircraft—plus repeat inspections triggered by hours, time or impact events, creating clear compliance and reporting obligations for owners, operators and maintenance organisations. (Compliance)"},"kimi_summary":{"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"This AD maintains its original narrow scope: mandating inspections of wooden airframe structures in DH 60 Moth aircraft. It has not expanded beyond this specific safety purpose."},"complexity_factors":["Only 2 defined terms (DHSL and TNS)","Single technical reference document (TNS) with specific appendices and figures cited","Straightforward conditional logic: two compliance timelines based on commercial vs non-commercial use","Simple repeat inspection trigger (200 hours OR 36 months OR damage event)","No nested exceptions or cross-references to other legislation beyond basic CAR 1988 defect reporting","Short, single-purpose document focused on one aircraft type and one safety issue"],"plain_english_summary":"This AD requires owners and operators of vintage de Havilland DH 60 Moth biplanes to inspect and, if necessary, repair the internal wooden wing and tail structure and to cease aerobatic operations until those inspections clear the aircraft. It mandates access inspections, corrective action for rot or damage, and reporting of defects to CASA.\n\nIt affects all DH 60 variants and matters because aged wooden structure can fail unexpectedly, risking structural failure and loss of life."}},"importantCases":[],"_links":{"self":"/api/acts/ad-dh-60-10-inspection-of-wooden-structure","history":"/api/acts/ad-dh-60-10-inspection-of-wooden-structure/history","analysis":"/api/acts/ad-dh-60-10-inspection-of-wooden-structure/analysis","conflicts":"/api/acts/ad-dh-60-10-inspection-of-wooden-structure/conflicts","importantCases":"/api/acts/ad-dh-60-10-inspection-of-wooden-structure/important-cases","documents":"/api/acts/ad-dh-60-10-inspection-of-wooden-structure/documents"}}