{"id":"F2006B08165","name":"AD/CESSNA 310/38 - Propeller Governor - Inspection and Replacement","slug":"ad-cessna-310-38-propeller-governor-inspection-and-replacement","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":115345,"registerId":"commonwealth-F2006B08165-current","compilationNumber":null,"startDate":"2026-04-03","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/CESSNA 310/38 - Propeller Governor - 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)  Cessna 310 Series Aeroplanes\n\n \n\nAD/CESSNA 310/38 Propeller Governor - Inspection\n\nand Replacement Applicability: Models 310P and 310Q as listed in the requirement documents. Document:               1. McCauley SB 108; or\n\n2. Cessna SL ME75-12; or 3. FAA AD 75-12-07.\n\nCompliance: Within 100 hours time in service after 29 August 1975.\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\n8/75\n","sortOrder":0}],"analysis":{"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The directive as written sets a narrow, specific requirement: inspect and replace the propeller governor on the listed Cessna 310 models according to the referenced technical documents within a specified time window. There is no indication in the text that the scope was broadened or narrowed from an earlier stated intent; the AD confines action to the models and documents listed and to the 100-hour compliance period. (See: AD/CESSNA 310/38; Applicability; Document list; Compliance.)"},"complexity_factors":["Short, narrowly worded directive with a single, time-limited requirement (inspection and replacement) rather than multiple interlocking rules.","Technical execution and detailed procedures delegated to three external documents (McCauley SB 108; Cessna SL ME75-12; FAA AD 75-12-07), requiring access to and interpretation of those sources.","Clear applicability limited to specific airframe models (310P and 310Q) but requires cross-referencing with the referenced documents to confirm which serials/variants are affected.","Fixed compliance window (100 hours time in service after 29 August 1975) imposes scheduling constraints and creates operational opportunity costs.","Enforcement and any allowance for alternative methods depends on regulator discretion and availability of approved maintenance resources and parts."],"plain_english_summary":"What this directive does\n\n- This airworthiness directive (AD/CESSNA 310/38) requires inspection and, if necessary, replacement of the propeller governor on certain Cessna 310 aeroplanes (Models 310P and 310Q). (See: AD/CESSNA 310/38, Applicability.)\n\nWho it affects\n\n- Owners and operators of Cessna 310P and 310Q aircraft listed in the referenced documents. Those persons must ensure the inspection and any replacement work is carried out according to the specified technical references. (See: Applicability; Document list.)\n\nHow it works mechanically\n\n- The AD does not set out detailed inspection steps in the text itself. Instead it refers operators to one of three technical documents for the required work: McCauley SB 108; Cessna SL ME75-12; or FAA AD 75-12-07. The inspection and replacement (if required) must be completed within 100 hours time in service after 29 August 1975. (See: Document list; Compliance.)\n\nWho pays and who decides\n\n- The financial and operational burden falls on the aircraft owner/operator: they must schedule the inspection, pay for labour and any replacement parts, and keep records of compliance. The Civil Aviation Safety Authority (CASA) issues and enforces the AD as part of the Schedule of Airworthiness Directives. (See: heading and Schedule of Airworthiness Directives; AD/CESSNA 310/38.)\n\nStated purpose and testing that claim\n\n- The directive’s title and placement in the Schedule indicate the action is to inspect and replace propeller governors for airworthiness reasons (implied by the AD title and placement). The AD accomplishes this by mandating action according to detailed manufacturer or FAA documents rather than embedding the technical procedure in the AD itself. (See: AD/CESSNA 310/38; Document list.)\n\nPractical costs, incentives and trade-offs\n\n- Direct costs: owners/operators incur inspection labour and replacement-part costs if the governor fails inspection. (Implied by requirement to inspect and replace.)\n- Timing and opportunity cost: aircraft must be taken out of service to carry out the work within the 100-hour window, affecting flight schedules and revenue for commercial operators or personal availability for private owners. (See: Compliance.)\n- Incentives: operators have a compliance incentive to avoid enforcement action and to maintain aircraft airworthiness; operators also face a private incentive to address faults that could cause in-flight problems. The AD creates a legal obligation that aligns private incentives with the regulatory safety aim. (See: AD/CESSNA 310/38; Compliance.)\n\nImplementation risks and administrative discretion\n\n- The AD delegates technical detail to the referenced documents; compliance depends on access to and interpretation of those documents, and on availability of approved parts and qualified maintenance personnel. Enforcement and any discretion about acceptability of alternative procedures or extensions rests with the regulator enforcing the AD. (See: Document list.)\n\nEffects on private choice and market participants\n\n- The AD restricts an owner/operator’s freedom to defer or decline the specified inspection/replacement for the covered aircraft: compliance within the stated timeframe is mandatory. It imposes a maintenance cost on the small set of owners/operators of affected models while leaving competing aircraft types unaffected. (See: Applicability; Compliance.)\n\nWhere to look in the directive for detail\n\n- For exact technical steps, part numbers, acceptance criteria and any alternative procedures, consult the referenced documents: McCauley SB 108; Cessna SL ME75-12; or FAA AD 75-12-07. The AD specifies which models are covered and sets the compliance deadline. (See: Document list; Applicability; Compliance.)"},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, time-bound safety directive from 1975 with a narrow, specific purpose (propeller governor inspection on two aircraft models). It has not expanded beyond its original scope."},"complexity_factors":["Very short document (approximately 150 words)","Only 2 aircraft models specified (310P and 310Q)","Single compliance requirement with clear deadline (100 hours time in service)","No defined terms section","No nested exceptions or conditional logic","Simple cross-references to 3 external technical documents rather than internal legislative cross-referencing"],"plain_english_summary":"This is an **Airworthiness Directive (AD)** — a mandatory safety order issued by Australia's Civil Aviation Safety Authority (CASA). It requires owners and operators of specific **Cessna 310P and 310Q aircraft** to inspect and potentially replace the **propeller governor** (a device that controls propeller speed) within **100 hours of flying time** after 29 August 1975.\n\nThe directive references three technical documents that contain the detailed instructions:\n- McCauley Service Bulletin 108\n- Cessna Service Letter ME75-12  \n- FAA Airworthiness Directive 75-12-07\n\n**Why it matters:** Propeller governor failures can cause loss of engine power or propeller control, creating serious flight safety risks. This AD ensures affected aircraft are checked and fixed before a dangerous failure occurs."}},"importantCases":[],"_links":{"self":"/api/acts/ad-cessna-310-38-propeller-governor-inspection-and-replacement","history":"/api/acts/ad-cessna-310-38-propeller-governor-inspection-and-replacement/history","analysis":"/api/acts/ad-cessna-310-38-propeller-governor-inspection-and-replacement/analysis","conflicts":"/api/acts/ad-cessna-310-38-propeller-governor-inspection-and-replacement/conflicts","importantCases":"/api/acts/ad-cessna-310-38-propeller-governor-inspection-and-replacement/important-cases","documents":"/api/acts/ad-cessna-310-38-propeller-governor-inspection-and-replacement/documents"}}