{"id":"F2006B04872","name":"AD/CASA/16 - Rudder Control","slug":"ad-casa-16-rudder-control","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":44679,"registerId":"commonwealth-F2006B04872-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/CASA/16 - Rudder Control","content":"---\nmeta-content-style-type: text/css\nmeta-content-type: application/xhtml+xml; charset=utf-8\nmeta-generator: Aspose.Words for .NET 22.10.0\n---\n\n?xml version=\"1.0\" encoding=\"utf-8\" standalone=\"no\"?>\n\nCOMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n \n\n![](image.001.png)  Casa 212 Series Aeroplanes\n\n \n\nAD/CASA/16 Rudder Control  3/94 DM\n\n \n\nApplicability: All Model C-212 aircraft.\n\n \n\nRequirement: 1. Action in accordance with CASA Communication COM 212-245.\n\n \n\n2. Action in accordance with CASA Service Bulletin 212-27-47.\n\n \n\nNote: Spanish DGCA AD 01/93 refers.\n\n \n\nCompliance: 1. Prior to each flight, until CASA Service Bulletin 212-27-47 is accomplished.\n\n \n\n2. Prior to 31 May 1994.\n\n \n\nBackground:  The Spanish DGCA requires an interim limitation on rudder pedal adjustment and then modification action in order to achieve the appropriate values of rudder surface deflection for required flying handling qualities, regardless of the selected rudder pedal assembly adjustment.\n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, time-bound safety directive addressing a specific airworthiness issue. It has not expanded beyond its original purpose of mandating rudder control modifications for the CASA 212 fleet."},"complexity_factors":["Very short document (approximately 200 words)","Only 2 substantive requirements with clear compliance deadlines","No defined terms section — uses plain operational language","Minimal cross-referencing (only references one service bulletin and one Spanish authority document)","No conditional logic or nested exceptions","Single applicability criterion (all Model C-212 aircraft)"],"plain_english_summary":"This is an **Airworthiness Directive (AD)** issued by Australia's Civil Aviation Safety Authority (CASA) for a specific type of aircraft: the **CASA 212 series** (a twin-turboprop utility plane originally designed in Spain).\n\n**What it does:**\nThe directive orders two safety actions to fix a problem with the **rudder controls** — the foot pedals that steer the aircraft left and right.\n\n**The problem:**\nThe Spanish aviation authority discovered that depending on how the rudder pedals were adjusted, the rudder (the movable surface on the tail) might not deflect (move) enough to give pilots proper control of the aircraft. This could affect flying safety.\n\n**What operators must do:**\n\n1. **Immediate action (before every flight):** Check and limit how the rudder pedals are adjusted — this is a temporary fix until the permanent repair is done.\n\n2. **Permanent fix (by 31 May 1994):** Carry out modifications according to CASA Service Bulletin 212-27-47, which ensures the rudder works properly regardless of pedal adjustment.\n\n**Who it affects:**\nAnyone operating CASA 212 aircraft in Australia — typically charter operators, military contractors, or cargo carriers using these planes.\n\n**Why it matters:**\nRudder control is essential for safe flight, especially during takeoff, landing, and engine failure situations. This AD prevents potential loss of control due to inadequate rudder authority."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The instrument itself applies to all Model C-212 aircraft and mirrors the Spanish DGCA safety concern it cites (Background). The text does not indicate any expansion or narrowing of that original scope; it prescribes an interim limitation and a follow-up modification for the same model (Applicability; Requirement 1–2; Compliance 1–2)."},"complexity_factors":["Limited applicability to a single aircraft model (All Model C-212) reduces scope complexity (Applicability).","Two-step compliance: an ongoing interim operational limitation plus a mandatory modification with a fixed deadline (Requirement 1–2; Compliance 1–2).","Dependence on external documents (CASA Communication COM 212-245 and Service Bulletin 212-27-47) for the detailed technical steps introduces operational dependence on those documents (Requirement 1–2).","Safety-critical subject matter raises practical implementation attention (Background), though the AD's text is short and prescriptive.","Time-bound deadline (31 May 1994) creates a clear but potentially time-sensitive compliance schedule (Compliance 2)."],"plain_english_summary":"This AD requires every owner/operator of CASA Model C‑212 aeroplanes to apply an interim limitation on rudder pedal adjustment before each flight and to complete a mandated modification (per CASA Service Bulletin) by 31 May 1994. It’s intended to ensure rudder deflection meets handling requirements. Costs and recurring pre‑flight work fall to aircraft owners/operators, who must follow the referenced CASA communication and service bulletin exactly."}},"importantCases":[],"_links":{"self":"/api/acts/ad-casa-16-rudder-control","history":"/api/acts/ad-casa-16-rudder-control/history","analysis":"/api/acts/ad-casa-16-rudder-control/analysis","conflicts":"/api/acts/ad-casa-16-rudder-control/conflicts","importantCases":"/api/acts/ad-casa-16-rudder-control/important-cases","documents":"/api/acts/ad-casa-16-rudder-control/documents"}}