{"id":"F2006B05935","name":"AD/PA-36/19 Amdt 1 - Elevator and Aileron System Control Rod End Bearings - Inspection and Replacement","slug":"ad-pa-36-19-amdt-1-elevator-and-aileron-system-control-rod-end-bearings-inspection-and-replacement","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":136057,"registerId":"commonwealth-F2006B05935-current","compilationNumber":null,"startDate":"2026-04-03","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/PA-36/19 Amdt 1 - Elevator and Aileron System Control Rod End Bearings - Inspection and Replacement","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)  Piper PA-36 (Pawnee Brave) Series Aeroplanes\n\n \n\nAD/PA-36/19\n\nAmdt 1\n\n\nElevator and Aileron System Control Rod End Bearings - Inspection and Replacement\n\n\n12/78\n\n \n\nApplicability:  All models PA-36-285/300 with S/Nos. 36-7360001 to 36-7860116 and All model PA-36-375 with S/Nos. 36-7802002 to 36-7802049 except those S/Nos. omitted in SB No. 608A.\n\n \n\nDocument: Piper SB No. 608A.\n\n \n\nCompliance: At intervals not exceeding 100 hours time in service until replaced in accordance with SB No. 608A.\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\n \n","sortOrder":0}],"analysis":{"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The supplied amendment text sets a compliance regime (100-hour inspections until replacement per SB No. 608A) for a defined set of aircraft serial numbers. The document as provided does not include the prior version of the directive or describe any change to scope; therefore, from the provided text there is no basis to conclude the scope has changed from the original instrument. The AD does note it is an amendment (\"Amdt 1\") but does not state which requirements, if any, were altered relative to the original AD in the excerpt supplied."},"complexity_factors":["Narrow and specific applicability by model and serial-number ranges (Applicability: text)","Periodic inspection requirement (every 100 hours TIS) until a one-off remedy is performed (Compliance: text)","Delegation of technical procedures to an external manufacturer document (Piper SB No. 608A) rather than inclusion in the AD (Document: text)","Exception clause referencing serial numbers omitted in the SB, which requires operators to cross-check two documents (Applicability: text)","Limited scope of regulatory text — does not specify inspection criteria or replacement steps, increasing reliance on the service bulletin for implementation"],"plain_english_summary":"What this instrument does (mechanically)\n\n- Requires regular inspections of the elevator and aileron system control rod end bearings on a defined set of Piper PA-36 aeroplanes. The inspections must be carried out at intervals not exceeding 100 hours time in service until the bearings are replaced following Piper Service Bulletin No. 608A (Document: \"Piper SB No. 608A\"; Compliance: \"At intervals not exceeding 100 hours time in service until replaced in accordance with SB No. 608A\").\n\nWho it applies to\n\n- Applies to: all PA-36-285/300 aircraft with serial numbers 36-7360001 to 36-7860116, and all PA-36-375 aircraft with serial numbers 36-7802002 to 36-7802049, except for serial numbers that the service bulletin omits (Applicability: text).\n\nWho decides and enforces\n\n- The directive is issued under the Commonwealth Civil Aviation Regulations, Part 39, as an item in the Civil Aviation Safety Authority (CASA) Schedule of Airworthiness Directives. CASA is the issuing authority (header: \"COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES\").\n\nWhat owners/operators must do and who pays\n\n- Owners/operators of affected aircraft must schedule and perform inspections at or before every 100 hours time in service and must replace the specified bearings according to Piper SB No. 608A. The requirement to inspect continues only until the replacement called for in the service bulletin is completed (Compliance: text). The direct costs — labour, parts, service-bulletin procurement (if applicable), and aircraft downtime — fall on the aircraft owners/operators (implied by the obligation to carry out inspections and replacements under the AD).\n\nStated purpose and how that purpose works mechanically\n\n- The AD operates by mandating repeated inspection until a defined remedial action (replacement per SB No. 608A) is taken. The stated mechanism is to detect and then remove the specified component condition by replacement; the document supplying the technical procedures is Piper SB No. 608A (Document: text). The AD does not itself contain the detailed inspection or replacement procedures — it delegates those technical details to the service bulletin.\n\nCosts, incentives and trade-offs (mechanical effects)\n\n- Recurring inspection requirement (every 100 hours TIS) creates an ongoing maintenance cost and scheduled downtime for the affected fleet until replacement is done (Compliance: text; Applicability: limited S/N range). The replacement step is a one-off cost that, per the AD's mechanics, removes the need for further AD-mandated inspections (the AD requires inspections \"until replaced in accordance with SB No. 608A\").\n\n- Delegating procedural detail to Piper SB No. 608A concentrates the technical decision (how to inspect and how to replace) with the manufacturer/service bulletin; the regulator sets the compliance trigger and timing (CASA issues the AD; the SB provides the technical remedy). Operators must obtain and follow the SB to comply.\n\nImplementation risks and compliance burden\n\n- Operators must verify applicability against serial-number ranges and check SB No. 608A for any omitted serial numbers referenced by the AD (Applicability: exception clause). This requires access to the SB and accurate aircraft records. The AD does not itself spell out inspection criteria or replacement steps, so compliance depends on following the SB.\n\nEffects on private choice and market implications\n\n- The requirement constrains operator scheduling and maintenance budgets for the affected aircraft. The set of affected aircraft is limited by serial number ranges, which concentrates financial burden on operators of those specific machines (Applicability: text). There is no provision in the AD text for alternatives or deferred compliance; the AD prescribes inspection interval and replacement per the SB.\n\nSummary sentence\n\n- In short: CASA requires owners/operators of specified PA-36 aircraft to inspect elevator and aileron control rod end bearings every 100 hours TIS and to replace them according to Piper SB No. 608A; this creates recurrent inspection costs until the mandated replacement is performed, and the detailed technical procedure is set by the manufacturer's service bulletin (Applicability / Document / Compliance: text)."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a standard airworthiness directive with narrow, targeted scope. It addresses a specific mechanical defect in specific aircraft models. There is no evidence of scope creep; the document remains focused on its original safety purpose."},"complexity_factors":["Very short document (approximately 150 words)","Only 3 operative provisions: applicability, reference document, and compliance requirement","Single cross-reference to external technical document (Piper SB No. 608A)","No defined terms section","Simple conditional logic (applicability based on model and serial number ranges with explicit exceptions)","Straightforward compliance mechanism (recurring inspection until replacement)"],"plain_english_summary":"This is an **Airworthiness Directive** — a mandatory safety order issued by Australia's Civil Aviation Safety Authority (CASA) for specific aircraft.\n\n**What it does:**\n- Requires owners and operators of certain **Piper PA-36 \"Pawnee Brave\" agricultural aircraft** to inspect and eventually replace the **elevator and aileron control rod end bearings** (these are mechanical joints that connect the pilot's control inputs to the aircraft's tail and wing surfaces).\n\n**Who it affects:**\n- Owners and operators of PA-36-285/300 models with serial numbers 36-7360001 to 36-7860116\n- Owners and operators of PA-36-375 models with serial numbers 36-7802002 to 36-7802049\n- **Excludes** specific serial numbers listed in Piper Service Bulletin 608A\n\n**What must be done:**\n- **Inspect** these bearings at least every **100 hours of flight time** (\"time in service\")\n- **Continue inspecting** until the parts are **replaced** following the procedures in Piper Service Bulletin 608A\n\n**Why it matters:**\nControl rod end bearings are critical for flight safety. If they fail, the pilot could lose control of the elevator (which controls pitch/up-down movement) or ailerons (which control roll/banking). This directive prevents potential accidents by catching wear or damage before it becomes dangerous."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pa-36-19-amdt-1-elevator-and-aileron-system-control-rod-end-bearings-inspection-and-replacement","history":"/api/acts/ad-pa-36-19-amdt-1-elevator-and-aileron-system-control-rod-end-bearings-inspection-and-replacement/history","analysis":"/api/acts/ad-pa-36-19-amdt-1-elevator-and-aileron-system-control-rod-end-bearings-inspection-and-replacement/analysis","conflicts":"/api/acts/ad-pa-36-19-amdt-1-elevator-and-aileron-system-control-rod-end-bearings-inspection-and-replacement/conflicts","importantCases":"/api/acts/ad-pa-36-19-amdt-1-elevator-and-aileron-system-control-rod-end-bearings-inspection-and-replacement/important-cases","documents":"/api/acts/ad-pa-36-19-amdt-1-elevator-and-aileron-system-control-rod-end-bearings-inspection-and-replacement/documents"}}