{"id":"F2006B05362","name":"AD/P68/36 - Horizontal Tailplane","slug":"ad-p68-36-horizontal-tailplane","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":45916,"registerId":"commonwealth-F2006B05362-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/P68/36 - Horizontal Tailplane","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)  \nPartenavia P68 Series Aeroplanes\n\nAD/P68/36 Horizontal Tailplane 12/91 DM\n\nApplicability: Model P68 series with serial numbers up to and including 327. Requirement: Action in accordance with the technical requirements of RAI AD 91-272.\n\nNote: Partenavia SB 85 refers.\n\nCompliance: Unless already accomplished; as specified in the Requirement Document but with a revised modification accomplishment date of 31 January 1992 for Australian registered aircraft.\n\nBackground: This Directive initially requires the introduction of airspeed limitations. These limitations are subsequently removed when a modification to the horizontal tailplane is incorporated. The compliance time required by the RAI is extended by one month.\n\nCOMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 \\- 105 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n![](image.001.png)","sortOrder":0}],"analysis":{"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":true,"description":"This AD does not change the set of aircraft to which it applies (still Partenavia P68 series, serial numbers up to and including 327) but it does alter the compliance timeline in relation to the referenced RAI: the directive extends the RAI compliance time by one month and sets a revised modification accomplishment date of 31 January 1992 for Australian-registered aircraft (Compliance; Background)."},"complexity_factors":["Short, narrowly targeted directive with a single aircraft type and serial-number range (Applicability).","Dependence on external technical documents (RAI AD 91-272 and Partenavia SB 85) for procedural detail (Requirement; Note).","A temporary operational measure (airspeed limitations) paired with a required design/modification action (Background).","A specific revised compliance deadline for Australian-registered aircraft, introducing a timing constraint (Compliance).","Limited textual detail in the AD itself forces operators to consult multiple documents to know exact technical and logistical requirements (Requirement; Note)."],"plain_english_summary":"Applies to Partenavia P68 series aeroplanes (s/n ≤ 327) and requires operators to follow the technical actions in RAI AD 91‑272. Temporary airspeed limits are imposed until a horizontal‑tailplane modification is fitted, after which the limits are lifted.\n\nCASA set a revised compliance deadline of 31 January 1992 for Australian‑registered aircraft. The directive mainly affects owners/operators who must schedule the modification and comply with operational limits until it’s completed."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, single-issue airworthiness directive addressing a specific technical defect in a specific aircraft model. It has not expanded beyond its original safety purpose."},"complexity_factors":["Very short document (approximately 150 words)","Only 1 defined term implicitly referenced (RAI AD 91-272)","Simple conditional structure: 'Unless already accomplished' single exception","No nested cross-references within the instrument itself","Single applicability criterion (serial number range)","Background section provides explanatory context rather than operative provisions"],"plain_english_summary":"This is an **Airworthiness Directive** (a mandatory safety order) issued by Australia's Civil Aviation Safety Authority for certain Partenavia P68 aircraft.\n\n**What it does:**\n- **Applies to:** Partenavia P68 series aeroplanes with serial numbers 327 and below\n- **Requires:** Operators must follow the technical requirements of Italian aviation authority directive RAI AD 91-272\n- **Key action:** Initially imposes airspeed limits on affected aircraft; these limits can be removed once a specific modification to the horizontal tailplane (the small wing at the back of the plane) is installed\n- **Deadline:** Australian-registered aircraft must complete the modification by **31 January 1992** (one month later than the original Italian requirement)\n\n**Why it matters:**\nThis directive addresses a safety issue with the horizontal tailplane. Without the modification, pilots must fly slower than normal to ensure the tail remains structurally sound. The extension gives Australian operators slightly more time to comply than European operators received.\n\n**Reference documents:**\n- RAI AD 91-272 (the Italian aviation authority's original directive)\n- Partenavia Service Bulletin 85 (manufacturer's technical instructions)"}},"importantCases":[],"_links":{"self":"/api/acts/ad-p68-36-horizontal-tailplane","history":"/api/acts/ad-p68-36-horizontal-tailplane/history","analysis":"/api/acts/ad-p68-36-horizontal-tailplane/analysis","conflicts":"/api/acts/ad-p68-36-horizontal-tailplane/conflicts","importantCases":"/api/acts/ad-p68-36-horizontal-tailplane/important-cases","documents":"/api/acts/ad-p68-36-horizontal-tailplane/documents"}}