{"id":"F2006B06087","name":"AD/PC-12/25 - Windshield Heater Operation","slug":"ad-pc-12-25-windshield-heater-operation","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":114485,"registerId":"commonwealth-F2006B06087-current","compilationNumber":null,"startDate":"2026-04-03","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"AIRWORTHINESS DIRECTIVE","sectionType":"part","heading":"AIRWORTHINESS DIRECTIVE","content":"# AIRWORTHINESS DIRECTIVE\n\n![](image.002.png)\n\n![](image.002.png)  \nFor the reasons set out in the background section, the CASA delegate whose signature appears below issues the following Airworthiness Directive (AD) under subregulation 39.1 (1) of CAR 1998. The AD requires that the action set out in the requirement section (being action that the delegate considers necessary to correct the unsafe condition) be taken in relation to the aircraft or aeronautical product mentioned in the applicability section: (a) in the circumstances mentioned in the requirement section; and (b) in accordance with the instructions set out in the requirement section; and (c) at the time mentioned in the compliance section.","sortOrder":0},{"sectionNumber":"AD/PC-12/25 Windshield Heater Operation ","sectionType":"part","heading":"AD/PC-12/25 Windshield Heater Operation 12/2000 TX","content":"# AD/PC-12/25 Windshield Heater Operation 12/2000 TX\n\nApplicability: 1. All Model PC-12 and PC-12/45 aeroplanes from Manufacturers Serial Number (MSN) 201 up to and including MSN 320, which have the new windshields Pilatus Part Number (P/N) 959.81.10.107 LH and 959.81.10.108 RH (PPG P/N\n\nNP172121-5 LH and NP172121-6 RH) installed, and\n\n2. All Model PC-12 and PC-12/45 aeroplanes from MSN 101 up to and including MSN 200, in which the old windshields were replaced with the new Pilatus P/N 959.81.10.107 LH and 959.81.10.108 RH (PPG P/N NP172121-5 LH and NP172121-6 RH) windshields.\n\nNote 1: The windshields can be identified by the presence of three imbedded temperature sensors on the outboard edge of the windscreen.\n\nRequirement: 1. Remove Temporary Revision No 14 and insert Temporary Revision No 21 into the Limitations Section (Section 2) of the PC-12 Pilots Operating Handbook (POH/AFM) to include the following statement:\n\n“Operation of the DE ICING LH WSHLD and RH WSHLD switch to the LIGHT position is prohibited”\n\n    2. Check if the placard referenced in POH/AFM Temporary Revision No 21 is installed on the DE ICING panel, to the right of the RH WSHLD switch, positioned between the landing gear indicators and the silencer switch. If necessary, install the placard.\n\n    3. Modify the windshield de-ice system wires and circuit breakers in accordance with the Accomplishment Instructions of Pilatus Aircraft Ltd PC-12 Service Bulletin (SB) 30-006 dated 22 May 2000.\n\nIncorporation of SB 30-006 constitutes terminating action for Requirements 1 and 2\\. The POH/AFM Temporary Revision and the placard may be removed after this modification is embodied.\n\nNote 2: FOCA Switzerland AD HB 2000-393 refers.\n\nCompliance: For Requirement 1 \\- Before 30 October 2000.","sortOrder":1}],"analysis":{"flash_summary_failed":{"failed":true,"reason":"A positive credit balance is required for all requests, including BYOK, so fallback providers remain available. Add credits at https://vercel.com/d?to=%2F%5Bteam%5D%2F%7E%2Fai%3Fmodal%3Dtop-up to continue.","source":"analysis-cron"},"kimi_summary":{"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"This is a standard, targeted airworthiness directive addressing a specific unsafe condition in a defined subset of aircraft. It remains focused on its original purpose: correcting a windshield heater operational safety issue."},"complexity_factors":["Specific applicability criteria based on manufacturer serial numbers (MSN ranges) and part numbers","Cross-reference to external technical documents (Pilatus Service Bulletin 30-006, FOCA Switzerland AD HB 2000-393)","Conditional logic: Requirement 1 and 2 can be terminated after Requirement 3 is completed","Visual identification requirement (three embedded temperature sensors)","Precise physical location description for placard installation","Specific deadline compliance date (30 October 2000)"],"plain_english_summary":"This CASA Airworthiness Directive requires operators of certain Pilatus PC‑12s with newer replacement windshields (three outer-edge sensors) to immediately prohibit use of the windshield de‑icing \"LIGHT\" setting, add a cockpit warning placard, update the flight manual, and install a permanent wiring/circuit‑breaker fix per the manufacturer’s service bulletin. It prevents overheating, cracking, electrical fire, or visibility loss while a permanent remedy is fitted."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":true,"description":"The AD applies both to aeroplanes delivered with the new windshields (MSN 201–320) and to earlier aeroplanes that have had the new windshields retrofitted (MSN 101–200 where old windshields were replaced). It therefore extends obligations to retrofit installations as well as original installations (Applicability)."},"complexity_factors":["Targeted applicability requires checking MSNs and specific windshield part numbers (Applicability).","Identification may need physical inspection for three embedded temperature sensors (Note 1).","Administrative action: insert POH/AFM Temporary Revision No 21 and check/install a placard (Requirement 1–2).","Technical work: modify windshield de‑ice wiring and circuit breakers per Pilatus SB 30‑006 (Requirement 3).","Terminating action dependency: SB 30‑006 work removes the temporary administrative restrictions (Incorporation of SB 30‑006 constitutes terminating action).","Fixed compliance deadline for the POH change creates scheduling pressure (Compliance: Requirement 1 — Before 30 October 2000)."],"plain_english_summary":"This AD requires operators of specified Pilatus PC-12 / PC-12/45 aeroplanes with certain new windshields to stop using the windshield de‑ice switches in the LIGHT position until an electrical modification is done. It mandates inserting a temporary POH/AFM revision, fitting a placard if missing, and carrying out the Pilatus Service Bulletin (SB 30‑006); completing the SB is the terminating action that allows removal of the temporary revision and placard. Affected aeroplanes are identified by MSN ranges and specific windshield part numbers."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pc-12-25-windshield-heater-operation","history":"/api/acts/ad-pc-12-25-windshield-heater-operation/history","analysis":"/api/acts/ad-pc-12-25-windshield-heater-operation/analysis","conflicts":"/api/acts/ad-pc-12-25-windshield-heater-operation/conflicts","importantCases":"/api/acts/ad-pc-12-25-windshield-heater-operation/important-cases","documents":"/api/acts/ad-pc-12-25-windshield-heater-operation/documents"}}