{"id":"F2006B06102","name":"AD/PC-12/4 - Propeller De-Icing Controller","slug":"ad-pc-12-4-propeller-de-icing-controller","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":46846,"registerId":"commonwealth-F2006B06102-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/PC-12/4 - Propeller De-Icing Controller","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)  \nPilatus PC-12 Series Aeroplanes\n\nAD/PC-12/4 Propeller De-Icing Controller 12/96\n\nApplicability: This Directive is applicable to PC-12 aeroplanes serial numbers 101 through 153 inclusive, equipped with Propeller De-icing Controller (PDIC) part number 968.29.13.223 (BFG 4E3163-1).\n\nRequirement: Inspect the PDIC to determine the modification status and, if necessary, replace the PDIC in accordance with Pilatus Aircraft Ltd PC-12 Service Bulletin (SB) 30-002 dated 16 September 1996.\n\nNote: FOCA Switzerland AD HB 96-416 refers\n\nCompliance: Either concurrent with the incorporation of Pilatus Aircraft Ltd SB 30-001 dated\n\n20 December 1995 (Modification to the Anti-icing and De-icing Systems) or prior to 31 January 1997, whichever is later.\n\nThis Airworthiness Directive becomes effective on 7 November 1996.\n\nBackground: The Swiss Federal Office for Civil Aviation (FOCA) has advised that a potential for an Electromagnetic Interference (EMI) induced failure of the PDIC may exist. This condition, if not corrected, could cause incorrect operation of the PDIC and/or nuisance fault warnings.\n\nThis Directive requires an inspection to determine the serial number and modification status of the PDIC and, if necessary, the installation of a modified PDIC with improved EMI protection.","sortOrder":0}],"analysis":{"flash_summary_failed":{"failed":true,"reason":"Unauthenticated. Configure AI_GATEWAY_API_KEY or use a provider module. Learn more: https://ai-sdk.dev/unauthenticated-ai-gateway","source":"analysis-cron"},"flash_summary":{"complexity_score":4,"scope_assessment":{"changed":false,"description":"The directive as written narrows application to a specific aircraft subset and PDIC part and prescribes inspection/replacement per a manufacturer service bulletin. There is no text indicating an expansion or deviation from that stated intent; the scope remains targeted to the identified serial numbers, part number and the EMI‑protection modification."},"complexity_factors":["Narrow applicability: limited to PC‑12 serial numbers 101–153 and a single PDIC part number (968.29.13.223), which simplifies scope but requires serial/part verification.","Technical subject matter: issue is electromagnetic interference (EMI) risk to avionics, requiring technical assessment and a hardware change.","Cross‑references to external documents: mandates compliance with Pilatus SB 30‑002 and links timing to SB 30‑001, increasing procedural steps.","Compliance timing: conditional deadline (either concurrent with SB 30‑001 or by 31 Jan 1997) adds scheduling complexity for operators.","Regulatory cross‑reference: notes FOCA Switzerland AD HB 96‑416, indicating international coordination of airworthiness findings.","Operational burden: inspection, potential parts procurement and installation impose direct costs and downtime on operators.","Enforcement and recordkeeping: directive issued under Civil Aviation Regulations Part 39 (CASA), requiring demonstrable compliance."],"plain_english_summary":"This directive requires operators of Pilatus PC‑12 aircraft (serial numbers 101–153) fitted with PDIC part 968.29.13.223 to inspect the Propeller De‑icing Controller and replace it if it lacks a specified EMI‑protection modification. Compliance must follow Pilatus Service Bulletin SB 30‑002 and be done either with SB 30‑001 or by 31 January 1997. Aircraft owners/operators pay for inspection and any replacement; the Civil Aviation Safety Authority enforces the requirement. The stated purpose is to address an EMI‑induced failure risk and nuisance warnings."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This Airworthiness Directive maintains its original narrow scope. It addresses a specific safety defect identified in a limited production batch of aircraft (serial numbers 101-153) with a specific defective part. There is no evidence of scope creep; the directive remains tightly focused on the EMI vulnerability in the identified PDIC units."},"complexity_factors":["Single, specific applicability criterion (serial number range 101-153)","Only one defined part number to identify","Straightforward two-step requirement: inspect, then replace if necessary","Single cross-reference to a Swiss authority directive (FOCA AD HB 96-416) for background only","Simple compliance deadline structure (concurrent with another SB or fixed date, whichever is later)","No nested exceptions, conditional logic, or interpretive provisions","Total length: approximately 200 words"],"plain_english_summary":"This CASA Airworthiness Directive requires owners/operators of Pilatus PC-12 aeroplanes (serial numbers 101–153) to inspect the Propeller De‑icing Controller (PDIC) when fitted with part number 968.29.13.223 (BFG 4E3163‑1) and replace it if the wrong/unmodified unit is present. The action responds to EMI‑related failures that can disable de‑icing or trigger false warnings, creating a serious safety risk; compliance is tied to a related modification or by 31 January 1997."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pc-12-4-propeller-de-icing-controller","history":"/api/acts/ad-pc-12-4-propeller-de-icing-controller/history","analysis":"/api/acts/ad-pc-12-4-propeller-de-icing-controller/analysis","conflicts":"/api/acts/ad-pc-12-4-propeller-de-icing-controller/conflicts","importantCases":"/api/acts/ad-pc-12-4-propeller-de-icing-controller/important-cases","documents":"/api/acts/ad-pc-12-4-propeller-de-icing-controller/documents"}}