{"id":"F2006B10190","name":"AD/GAF-N22/43 Amdt 1 - Autopilot Aileron Servo Unit Bridle Cable Assembly P/N 1/N-45-1317 - Inspection","slug":"ad-gaf-n22-43-amdt-1-autopilot-aileron-servo-unit-bridle-cable-assembly-p-n-1-n-45-1317-inspection","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":55848,"registerId":"commonwealth-F2006B10190-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/GAF-N22/43 Amdt 1 - Autopilot Aileron Servo Unit Bridle Cable Assembly P/N 1/N-45-1317 - Inspection","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)  \nGAF N22 and N24 Series Aeroplanes\n\nAD/GAF-N22/43\n\nAmdt 1\n\n  \n\nAutopilot Aileron Servo Unit Bridle Cable Assembly P/N 1/N-45-1317 - Inspection\n\n  \n8/82\n\nApplicability: All models N22, N22B, N22S, N24 and N24A fitted with 2 axis autopilot (option G48, G48-24 and G48-22S) except those modified to Mod. N554 or SB NMD-27-22.\n\nDocument: GAF Alert SB No. ANMD-27-20.\n\nCompliance: Unless previously accomplished initially inspect within 10 hours time in service after 11 September 1981 and thereafter at intervals not exceeding 120 hours time in service.\n\nBackground: The autopilot aileron servo bridle cable has failed inflight on a local aeroplane causing restriction to aileron control movement. Amdt. 1 removes from the applicability those aircraft embodying Mod. 554 or SB NMD-27-22.","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a standard Airworthiness Directive amendment. Amendment 1 narrows the scope slightly by exempting aircraft that have already received specific modifications (Mod. N554 or SB NMD-27-22). This is a typical refinement based on new technical data showing those modifications resolve the safety issue, not a scope expansion beyond original intent."},"complexity_factors":["Single, specific mechanical component targeted (bridle cable assembly P/N 1/N-45-1317)","Clear applicability criteria with explicit model numbers and option codes","Simple compliance structure: initial inspection + recurring interval (120 hours)","One amendment (Amdt 1) with straightforward change — removing modified aircraft from requirements","No nested definitions, cross-references to other legislation, or conditional exceptions beyond the single exemption","Total length: approximately 150 words"],"plain_english_summary":"This is an **Airworthiness Directive** — a mandatory safety order issued by Australia's aviation safety regulator (CASA) that requires specific inspections on certain GAF aircraft.\n\n**What it does:**\n- Requires owners/operators of specific GAF N22 and N24 series aircraft to inspect a particular autopilot component (the \"bridle cable assembly\" — essentially a cable that helps control the autopilot's connection to the ailerons, which are the wing flaps that make the plane turn).\n\n**Who it affects:**\n- Owners and operators of GAF N22, N22B, N22S, N24, and N24A aircraft that have a two-axis autopilot system installed (specific options G48, G48-24, or G48-22S).\n- **Exemption:** Aircraft that have already been modified according to \"Mod. N554\" or service bulletin \"SB NMD-27-22\" don't need to comply — this is what \"Amdt 1\" (Amendment 1) changed from the original directive.\n\n**What must be done:**\n- First inspection within 10 hours of flying time after 11 September 1981.\n- Repeat inspections every 120 hours of flying time thereafter.\n\n**Why it matters:**\n- The bridle cable has actually failed in flight on at least one aircraft, causing restricted movement of the ailerons — meaning the pilot couldn't turn the plane properly. This is a serious safety risk.\n- The directive is legally binding. Non-compliance means the aircraft cannot legally fly.\n\n**Key document to follow:**\n- GAF Alert Service Bulletin No. ANMD-27-20 (this contains the detailed inspection instructions)."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":true,"description":"Amdt. 1 narrows the directive’s applicability by removing aircraft that embody Mod. N554 or Service Bulletin NMD-27-22 from the list of aircraft required to comply. The core inspection requirement and intervals remain unchanged. (Applicability; Background)"},"complexity_factors":["Narrow technical scope limited to one part number (P/N 1/N-45-1317) and specific aircraft models","Clear, fixed inspection timing (initial within 10 hours after a historical date; repeating every 120 hours) which reduces procedural ambiguity","Explicit exclusion for aircraft modified by Mod. N554 or SB NMD-27-22 introduces a conditional applicability rule","Dependence on an external technical document (GAF Alert SB No. ANMD-27-20) for inspection procedure","Safety-critical nature of the component (aileron servo bridle cable) increases practical importance despite simple rule text"],"plain_english_summary":"What this instrument does (mechanically)\n\n- It requires visual inspections of the autopilot aileron servo unit bridle cable assembly, part number 1/N-45-1317, on specified GAF N22 and N24 series aeroplanes fitted with a 2‑axis autopilot. (AD/GAF-N22/43 Amdt 1; Applicability)\n- The inspections must be done initially within 10 hours time in service after 11 September 1981 and then repeated at intervals not exceeding 120 hours time in service. (Compliance)\n- Aircraft that have been modified by Mod. N554 or Service Bulletin NMD-27-22 are excluded from the applicability of this directive. (Applicability; Background)\n- The technical procedure for the inspection is set out in GAF Alert Service Bulletin No. ANMD-27-20, which is referenced by the directive. (Document)\n\nWhy the directive exists (official rationale and mechanical effect)\n\n- The Background states that a bridle cable in the autopilot aileron servo unit has failed in flight on a local aeroplane, causing a restriction to aileron control movement. The inspection requirement is intended to detect that condition before it causes a control restriction. (Background)\n\nWho decides and who must act\n\n- The Civil Aviation Safety Authority (under the Commonwealth schedule of Airworthiness Directives) issues this directive; aircraft owners/operators of the affected GAF N22 and N24 models are required to comply when the aircraft are within the stated applicability. (AD/GAF-N22/43 Amdt 1; Applicability)\n- The GAF Alert Service Bulletin (ANMD-27-20) supplies the technical steps for carrying out the inspection. (Document)\n\nWho bears costs, incentives and compliance implications\n\n- Aircraft operators bear the direct costs: time to perform the initial inspection within 10 hours, ongoing inspection time every up-to-120-hour interval, any corrective maintenance if a defect is found, and any associated downtime. (Compliance)\n- Operators have an operational incentive to comply because the underlying fault has been shown to restrict aileron movement in flight; the inspection aims to reduce the risk of that outcome. (Background)\n- Operators whose aircraft already embody Mod. N554 or SB NMD-27-22 are no longer required to comply with this directive, shifting the burden away from those modified aircraft. (Applicability; Background)\n\nTrade-offs, implementation and practical points to note\n\n- The directive increases routine maintenance workload for affected aircraft through a mandatory inspection schedule; if defects are found, additional maintenance costs and operational downtime may follow. (Compliance)\n- The inspection procedure is external to the text of the directive and is contained in the referenced GAF Alert SB No. ANMD-27-20; compliance therefore requires access to and reliance on that document. (Document)\n- The amendment modifies scope by excluding specified modified aircraft from the requirement, reducing the number of aircraft that must undergo inspection. (Applicability; Background)\n\nSource citations\n\n- Applicability: lists affected models and exclusions for Mod. N554 or SB NMD-27-22. (Applicability)\n- Document: GAF Alert SB No. ANMD-27-20 provides inspection procedures. (Document)\n- Compliance: timing requirements—initial within 10 hours after 11 September 1981, thereafter every 120 hours. (Compliance)\n- Background: reports an in‑flight bridle cable failure that produced restricted aileron control movement and states the amendment’s change to applicability. (Background)"}},"importantCases":[],"_links":{"self":"/api/acts/ad-gaf-n22-43-amdt-1-autopilot-aileron-servo-unit-bridle-cable-assembly-p-n-1-n-45-1317-inspection","history":"/api/acts/ad-gaf-n22-43-amdt-1-autopilot-aileron-servo-unit-bridle-cable-assembly-p-n-1-n-45-1317-inspection/history","analysis":"/api/acts/ad-gaf-n22-43-amdt-1-autopilot-aileron-servo-unit-bridle-cable-assembly-p-n-1-n-45-1317-inspection/analysis","conflicts":"/api/acts/ad-gaf-n22-43-amdt-1-autopilot-aileron-servo-unit-bridle-cable-assembly-p-n-1-n-45-1317-inspection/conflicts","importantCases":"/api/acts/ad-gaf-n22-43-amdt-1-autopilot-aileron-servo-unit-bridle-cable-assembly-p-n-1-n-45-1317-inspection/important-cases","documents":"/api/acts/ad-gaf-n22-43-amdt-1-autopilot-aileron-servo-unit-bridle-cable-assembly-p-n-1-n-45-1317-inspection/documents"}}