{"id":"F2006B11273","name":"AD/MCH/6 - Pitot Head Assembly - Modification","slug":"ad-mch-6-pitot-head-assembly-modification","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":57072,"registerId":"commonwealth-F2006B11273-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/MCH/6 - Pitot Head Assembly - Modification","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)  Aero Resources J2 Series Gyroplanes\n\n \n\nAD/MCH/6 Pitot Head Assembly - Modification 10/74\n\nApplicability: All model J2.\n\n \n\nRequirement:  Install an approved low yaw sensitivity pitot tube assembly, in a position to give the most accurate A.S.I. readings under sideslip conditions, to a scheme approved by the Secretary.\n\n \n\nNote: Modification to Hawker de Havilland Aircraft Pty. Ltd. drawing No. 26-D-4 is an acceptable means of compliance.\n\n \n\nCompliance: Before issue of a Certificate of Airworthiness.\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\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1371},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"The directive maintains a tightly focused scope on the specific airworthiness issue of pitot tube yaw sensitivity for the J2 gyroplane series. There is no evidence of expansion beyond the original safety purpose or application to unintended aircraft types."},"complexity_factors":["Single aircraft model applicability (Aero Resources J2 only)","One unambiguous substantive requirement with no exceptions","Minimal cross-referencing (only one technical drawing cited)","No conditional logic or nested provisions","Extremely short length (under 150 words of operative text)"],"plain_english_summary":"**What this does:** This is a safety directive requiring a specific modification to the airspeed measurement system on Aero Resources J2 series gyroplanes. It mandates installing a pitot tube (the external sensor that measures how fast the aircraft is flying) that is less sensitive to yaw (sideways movement). This ensures the airspeed indicator shows accurate readings even when the aircraft is in a sideslip (flying slightly sideways).\n\n**Who it affects:** Owners and operators of all Aero Resources model J2 gyroplanes seeking to obtain or maintain a Certificate of Airworthiness.\n\n**What you must do:** Before the aircraft can be certified as airworthy, you must install an approved low-yaw-sensitivity pitot tube assembly positioned to give the most accurate readings during sideslip conditions. You can comply by following the modification scheme shown in **Hawker de Havilland Aircraft drawing No. 26-D-4**, which has been pre-approved by the Secretary (the relevant government authority)."}},"importantCases":[],"_links":{"self":"/api/acts/ad-mch-6-pitot-head-assembly-modification","history":"/api/acts/ad-mch-6-pitot-head-assembly-modification/history","analysis":"/api/acts/ad-mch-6-pitot-head-assembly-modification/analysis","conflicts":"/api/acts/ad-mch-6-pitot-head-assembly-modification/conflicts","importantCases":"/api/acts/ad-mch-6-pitot-head-assembly-modification/important-cases","documents":"/api/acts/ad-mch-6-pitot-head-assembly-modification/documents"}}