{"id":"F2006B08901","name":"AD/DH 82/3 - Rudder Bar Attachment Spigot - Modification","slug":"ad-dh-82-3-rudder-bar-attachment-spigot-modification","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":52416,"registerId":"commonwealth-F2006B08901-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/DH 82/3 - Rudder Bar Attachment Spigot - Modification","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)  \nDH 82 (Tiger Moth) Series Aeroplanes\n\nAD/DH 82/3 Rudder Bar Attachment Spigot \\- Modification NK\n\nApplicability: All models.\n\nRequirement: 1. Modify the front and rear rudder bars by re-locating the connecting rod locking pins so that they cannot become unclipped or jammed by fouling the control box.\n\n    2. An approved method of effecting this modification is as follows:\n\n    (a) Drill a No. 50 hole at 90o to the existing athwartships holes in the front and rear rudder bar connecting rod attachment spigots. Ensure that the new holes are located centrally below the existing holes, sufficiently clear of the rudder bar connecting rod to permit free fitment of the locking pins in a fore and aft direction.\n\n    (b) Plug the existing holes with suitable wire rivets.\n\n    (c) When installing the rudder bar connecting rod, lock up the ends on to the rudder bar spigots with AGS No. 1551 Mk. 3 locking pins.\n\n3. ANO 105.1.14.5.5.3.\n\nCompliance: Forthwith.","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":2658},"content_quality":"ok","complexity_score":4,"scope_assessment":{"changed":false,"description":"The directive remains tightly focused on its original purpose: correcting a specific mechanical defect in the rudder bar attachment spigots of Tiger Moth aircraft. It does not expand beyond this narrow technical fix or apply to additional aircraft systems."},"complexity_factors":["Dense technical aviation terminology (e.g., 'athwartships', 'spigots', 'ANO') requiring specialist knowledge","Precise engineering specifications (No. 50 drill bit, 90-degree angle, AGS No. 1551 Mk. 3 hardware)","Cross-reference to Airworthiness Notice Order 105.1.14.5.5.3 without explanatory context","Immediate compliance requirement ('forthwith') with no grace period for implementation"],"plain_english_summary":"Owners and operators of DH 82 Tiger Moth aircraft must immediately modify the front and rear rudder bars to stop locking pins from slipping or jamming and risking loss of rudder control.  \n\nSpecifically: drill new No.50 holes at 90° below the old spigot holes, permanently fill the existing athwartships holes with wire rivets, and refit using AGS No.1551 Mk.3 locking pins oriented front-to-back."}},"importantCases":[],"_links":{"self":"/api/acts/ad-dh-82-3-rudder-bar-attachment-spigot-modification","history":"/api/acts/ad-dh-82-3-rudder-bar-attachment-spigot-modification/history","analysis":"/api/acts/ad-dh-82-3-rudder-bar-attachment-spigot-modification/analysis","conflicts":"/api/acts/ad-dh-82-3-rudder-bar-attachment-spigot-modification/conflicts","importantCases":"/api/acts/ad-dh-82-3-rudder-bar-attachment-spigot-modification/important-cases","documents":"/api/acts/ad-dh-82-3-rudder-bar-attachment-spigot-modification/documents"}}