{"id":"F2006B07061","name":"AD/SM-205/39 - Powerplant Control Cables","slug":"ad-sm-205-39-powerplant-control-cables","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":48801,"registerId":"commonwealth-F2006B07061-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/SM-205/39 - Powerplant Control Cables","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)  \nSIAI Marchetti S205 and S208 Series Aeroplanes\n\nAD/SM-205/39 Powerplant Control Cables 5/98\n\nApplicability: All models S. 205 and S. 208 aircraft.\n\nRequirement: 1. Remove all powerplant control cables from the aircraft and inspect in accordance with AERMACCHI Service Bulletin 205-SB-061.\n\n2. Inspect, without removal from the aircraft, all powerplant control cables in accordance with AERMACCHI Service Bulletin 205-SB-061.\n\nNote: RAI AD 98-021 refers.\n\nCompliance: 1. Within 50 hours time in service after 23 April 1998, or before 31 December 1998, whichever occurs first, and at each engine overhaul thereafter.\n\n2. Within 100 hours time in service after accomplishment of the Requirement 1 inspection, and thereafter at intervals not to exceed 100 hours time in service.\n\nThis Airworthiness Directive becomes effective on 23 April 1998.\n\nBackground: The RAI requires inspections to check the structural integrity of the external sheaths protecting the engine control cables.","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a standard, narrow Airworthiness Directive targeting a specific safety issue (powerplant control cable sheath integrity) in a specific aircraft series. The scope remains tightly focused on the original safety concern identified by the Italian aviation authority (RAI) and adopted by CASA."},"complexity_factors":["Single, specific aircraft type (SIAI Marchetti S.205/S.208 series)","Only 2 defined compliance paths (removal inspection vs. non-removal inspection)","Clear time-based triggers (50 hours/31 December 1998, then 100-hour intervals)","No nested exceptions or conditional logic","References only one external technical document (AERMACCHI Service Bulletin 205-SB-061)","Total length: approximately 200 words","Straightforward applicability statement ('All models')"],"plain_english_summary":"This is a **safety order for specific Italian-made aircraft** used in Australia.\n\n**What it does:**\nThis Airworthiness Directive (AD) — essentially a mandatory safety fix — requires owners and operators of **SIAI Marchetti S.205 and S.208 series aeroplanes** to inspect the cables that control the engine (throttle, mixture, propeller controls, etc.). These cables have protective outer sheaths that can fail, so the regulator is forcing checks to prevent engine control failures in flight.\n\n**Who must do what:**\n- **Aircraft owners/operators** of the affected models must:\n  1. **First inspection:** Remove all engine control cables and inspect them following the manufacturer's service bulletin (AERMACCHI SB 205-SB-061) — must be done within 50 flight hours after 23 April 1998 or before 31 December 1998 (whichever comes first), and again at every engine overhaul.\n  2. **Ongoing checks:** Every 100 flight hours, inspect the cables again (without removing them this time) using the same service bulletin.\n\n**Why it matters:**\nIf the protective sheaths on these cables deteriorate, pilots could lose control of the engine — potentially leading to power loss or uncontrolled engine settings. This AD prevents that by catching wear early.\n\n**Key terms explained:**\n- **Airworthiness Directive (AD):** A legally binding safety order from the aviation regulator (CASA) that must be followed to keep an aircraft airworthy.\n- **Time in service:** Flight hours — time the aircraft is actually flying, not just sitting on the ground.\n- **Service Bulletin:** Technical instructions issued by the aircraft manufacturer for maintenance or inspections."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"Scope remains limited to all S.205 and S.208 aircraft and to inspections of powerplant control cables as set out in the AD (Applicability; Requirement). The instrument adds specific timing and recurrence rules but does not broaden the class of affected aircraft or the subject matter of inspection."},"complexity_factors":["External dependency on AERMACCHI Service Bulletin 205-SB-061 for inspection procedures (Requirement 1 & 2).","Two inspection pathways: removal for detailed inspection and in-situ inspections, with different timing (Requirement 1 vs 2; Compliance).","Multiple compliance triggers and intervals: initial 50-hour or date deadline, recurring 100-hour intervals, and engine-overhaul linkage (Compliance).","Applicability limited to all S.205 and S.208 models but requires operators to interpret and implement technical inspection criteria (Applicability; Requirement).","Cross-reference to another AD (RAI AD 98-021) introduces potential additional obligations or coordination."],"plain_english_summary":"This Airworthiness Directive requires owners/operators of SIAI Marchetti S.205 and S.208 aircraft to inspect all powerplant control cables—removing them for detailed inspection per AERMACCHI Service Bulletin 205-SB-061 and performing periodic in‑place inspections. The Civil Aviation Safety Authority sets timing: an initial removal inspection within 50 hours after 23 April 1998 or by 31 December 1998, and recurring inspections every 100 hours or at each engine overhaul; operators pay for and must schedule the work."}},"importantCases":[],"_links":{"self":"/api/acts/ad-sm-205-39-powerplant-control-cables","history":"/api/acts/ad-sm-205-39-powerplant-control-cables/history","analysis":"/api/acts/ad-sm-205-39-powerplant-control-cables/analysis","conflicts":"/api/acts/ad-sm-205-39-powerplant-control-cables/conflicts","importantCases":"/api/acts/ad-sm-205-39-powerplant-control-cables/important-cases","documents":"/api/acts/ad-sm-205-39-powerplant-control-cables/documents"}}