{"id":"F2006B06080","name":"AD/PC-12/17 - Windshield Heat Wiring","slug":"ad-pc-12-17-windshield-heat-wiring","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":114478,"registerId":"commonwealth-F2006B06080-current","compilationNumber":null,"startDate":"2026-04-03","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/PC-12/17 - Windshield Heat Wiring","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-12/17 Windshield Heat Wiring 8/99 TX\n\nApplicability: All Model PC-12 and PC-12/45 aeroplanes with Manufacture’s Serial Numbers 101 up to and including 320, equipped with windshields Pilatus Part Number (P/N) 959.81.10.107 LH and 959.81.10.108 RH (PPG P/N NP 172121-5 LH and NP172121-6 RH.\n\nNote: Affected windshields can be identified by the presence of three imbedded temperature sensors on the outboard edge of the windshield.\n\nRequirement: Modify the electrical wiring in accordance with Pilatus PC-12 Service Bulletin 30- 005.\n\nNote: FOCA Switzerland AD HB 99-347 refers.\n\nCompliance: Before further flight.\n\nThis Airworthiness Directive becomes effective on 28 June 1999.\n\nBackground: FOCA has received several reports of overheating of the windshield de-ice system electrical power supply and temperature sensor wires located between terminal block TB152 and the windshield. This condition, if not corrected could result in total loss of electrical power in the aircraft.","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a standard, narrow Airworthiness Directive addressing a specific safety defect in specific aircraft. It has not expanded beyond its original purpose of mandating a wiring modification to prevent electrical failure."},"complexity_factors":["Single, specific technical requirement (modify wiring per Service Bulletin 30-005)","Limited applicability clearly defined by aircraft model, serial number range, and part numbers","No nested exceptions or conditional compliance pathways","Only one defined term implicitly used (P/N = Part Number)","No cross-references to other legislation or complex procedural requirements","Straightforward compliance deadline (before further flight)"],"plain_english_summary":"This CASA Airworthiness Directive requires owners/operators of Pilatus PC‑12 and PC‑12/45 aircraft (S/N 101–320) with certain Pilatus/PPG heated windshields (three outer-edge sensors) to urgently modify the heated‑windshield wiring per Pilatus Service Bulletin 30‑005. The change must be completed before further flight because the existing wiring has been overheating and could cause a complete electrical failure. This AD is mandatory and grounded in safety compliance."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The directive confines itself to correcting overheating wiring on identified PC‑12 aircraft fitted with particular windshield part numbers or identifiable by three embedded sensors. It implements a manufacturer service bulletin and does not broaden coverage beyond the stated serial numbers, parts, or the stated wiring modification remedy."},"complexity_factors":["Narrow applicability: specific aircraft models, serial number range (101–320) and precise windshield part numbers limit scope.","Single, well‑defined technical remedy: mandate to modify wiring per Pilatus Service Bulletin 30‑005 simplifies compliance steps.","Immediate compliance requirement: 'before further flight' creates time pressure and potential grounding/logistical impacts on operators.","Dependence on external documents: requires access to and execution of a manufacturer service bulletin and references FOCA AD.","Identification method: affected windshields can also be identified by presence of three embedded temperature sensors, adding an inspection step."],"plain_english_summary":"This Airworthiness Directive orders owners/operators of Pilatus PC‑12 and PC‑12/45 aeroplanes (S/N 101–320) fitted with the specified windshield part numbers to have the windshield heating wiring modified in accordance with Pilatus Service Bulletin 30‑005 before further flight. It responds to reports of overheating in the windshield de‑ice wiring that could cause total electrical power loss; compliance requires grounding affected aircraft until the wiring modification is carried out, incurring maintenance time and costs for operators."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pc-12-17-windshield-heat-wiring","history":"/api/acts/ad-pc-12-17-windshield-heat-wiring/history","analysis":"/api/acts/ad-pc-12-17-windshield-heat-wiring/analysis","conflicts":"/api/acts/ad-pc-12-17-windshield-heat-wiring/conflicts","importantCases":"/api/acts/ad-pc-12-17-windshield-heat-wiring/important-cases","documents":"/api/acts/ad-pc-12-17-windshield-heat-wiring/documents"}}