{"id":"F2006B06067","name":"AD/PB/1 - Beech Model 278 Series - Inspection","slug":"ad-pb-1-beech-model-278-series-inspection","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":114465,"registerId":"commonwealth-F2006B06067-current","compilationNumber":null,"startDate":"2026-04-03","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/PB/1 - Beech Model 278 Series - Inspection","content":"COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 \\- 107 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n![](image.001.png)  \nPropellers \\- Variable Pitch \\- Beechcraft\n\nAD/PB/1 Beech Model 278 Series \\- Inspection 8/62\n\nApplicability: All model 278 propellers with more than 200 hours time in service since new.\n\nRequirement: 1. Remove the propeller spinner and visually inspect for cracks and oil leaks in the weld area where the aft side of the hub barrel is joined to the hydraulic cylinder.\n\n2. Inspect the hub by magnetic particle inspection or approved equivalent method. Give particular attention to the weld area where the aft side of the barrel is joined to the hydraulic cylinder.\n\nNote: Repairs are not permissible.\n\nor Beech Propeller SB No. 6; or FAA AD 62-17-1.\n\nCompliance: For para. 1 - Within 25 hours time in service after 1 October 1962 and thereafter at intervals not exceeding 100 hours time in service. For para. 2 \\- Before installation in an aircraft following each propeller overhaul completed after 1 October 1962.","sortOrder":0}],"analysis":{"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The text presents a single, narrowly focused directive: it applies to all Beech model 278 propellers with more than 200 hours time in service and prescribes specific inspection actions, methods and timing. The document contains no language indicating any change to that scope; it sets applicability, inspection requirements (visual and magnetic particle or approved equivalent), a prohibition on repairs, and compliance intervals. Therefore there is no indication within this text that the scope has changed from the instrument's operative statements."},"complexity_factors":["Technical requirement to perform magnetic particle inspection or an approved equivalent (requires specialised equipment and trained personnel). (Requirement para. 2)","Recurring inspection schedule with an initial short‑term inspection (25 hours) and ongoing 100‑hour intervals (scheduling and tracking burden). (Compliance for para. 1)","Applicability threshold tied to time in service (>200 hours since new) requiring record checks to establish applicability. (Applicability)","Absolute prohibition on repairs for defects found under this AD, which constrains maintenance options and affects decision making after detection. (Note)","Cross‑references to external documents (Beech SB No. 6; FAA AD 62‑17‑1) that may be used for technical detail but do not replace the AD's mandatory requirements. (Note)"],"plain_english_summary":"This AD requires owners/operators of Beech model 278 propellers (with >200 hours TIS) to inspect the weld where the hub barrel joins the hydraulic cylinder for visible damage and oil leaks, and to perform magnetic‑particle (or approved equivalent NDT) inspections. Visual checks are due within 25 hours TIS and every 100 hours thereafter; NDT is required before reinstalling a propeller after overhaul. Repairs are not permitted under this AD, so detected defects will likely require removal/replacement."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, single-purpose safety directive focused solely on inspection requirements for one specific propeller model. It has not expanded beyond its original technical safety purpose."},"complexity_factors":["Very short document (under 200 words)","Only 2 substantive requirements with clear compliance deadlines","Single defined applicability criterion (200+ hours time in service)","No cross-references to other legislation sections (only references to equivalent FAA directive and manufacturer service bulletin)","Simple conditional logic: 'if over 200 hours, then inspect'","No nested exceptions or complex definitions"],"plain_english_summary":"This is a **safety directive** (called an \"Airworthiness Directive\") issued by Australia's Civil Aviation Safety Authority. It applies to a specific type of aircraft propeller — the **Beech Model 278 series**.\n\n**What it requires:**\nAnyone operating an aircraft with this propeller must:\n- **Visually inspect** the propeller for cracks and oil leaks in a specific weld area, and do this every 100 flight hours\n- **Magnetically inspect** the hub (a more thorough check using magnetic particle testing) every time the propeller is overhauled\n\n**Who it affects:**\n- Aircraft owners and operators with Beech Model 278 propellers that have logged more than 200 flight hours\n- Maintenance engineers who work on these propellers\n\n**Why it matters:**\nThis directive was issued because cracks in this specific weld area could cause **propeller failure** — a catastrophic safety risk. The \"Note\" explicitly states **repairs are not allowed**, meaning if damage is found, the propeller must be replaced, not fixed. The directive references equivalent American safety bulletins, showing this was a known international safety issue."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pb-1-beech-model-278-series-inspection","history":"/api/acts/ad-pb-1-beech-model-278-series-inspection/history","analysis":"/api/acts/ad-pb-1-beech-model-278-series-inspection/analysis","conflicts":"/api/acts/ad-pb-1-beech-model-278-series-inspection/conflicts","importantCases":"/api/acts/ad-pb-1-beech-model-278-series-inspection/important-cases","documents":"/api/acts/ad-pb-1-beech-model-278-series-inspection/documents"}}