{"id":"F2006B05992","name":"AD/PA-42/25 - Airframe Pneumatic De-icing Boots","slug":"ad-pa-42-25-airframe-pneumatic-de-icing-boots","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":114389,"registerId":"commonwealth-F2006B05992-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/PA-42/25 Airframe Pneumatic De-icing ","sectionType":"part","heading":"AD/PA-42/25 Airframe Pneumatic De-icing Boots 11/2000 DM","content":"# AD/PA-42/25 Airframe Pneumatic De-icing Boots 11/2000 DM\n\nApplicability: All Model PA-42, PA-42-720, PA-42-720R, and PA-42-1000 aircraft; equipped with pneumatic de-icing boots.\n\nRequirement: Revise the Limitations Section of the Aircraft Flight Manual (AFM) to include the following requirements for activation of the ice protection systems. Accomplish this action by inserting a copy of this Directive in the AFM.\n\n“ Except for certain phases of flight where the AFM specifies that de-icing boots should not be used (eg., take-off, final approach, and landing), compliance with the following is required.\n\n    \\- Wing and Tail Leading Edge Pneumatic De-icing Boot System, if installed, must be activated:\n\nAt the first sign of ice formation anywhere on the aircraft, or upon annunciation from an ice detector system, whichever occurs first; and\n\nThe system must either be continued to be operated in the automatic cycling mode, if available; or the system must be manually cycled as needed to minimise the ice accretions on the airframe.\n\n    \\- The wing and tail leading edge pneumatic de-icing boot system may be deactivated only after:\n\nLeaving known or observed/detected icing that the flight crew has visually observed on the aircraft or was identified by the on-board sensors; and\n\nAfter the aircraft is determined to be clear of ice.”\n\nNote: FAA AD 2000-14-08 Amdt 39-11817 refers.\n\nCompliance: Within 10 days after 13 September 2000.\n\nThis Airworthiness Directive becomes effective on 13 September 2000.","sortOrder":1}],"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"},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a targeted safety directive addressing a specific unsafe condition in specific aircraft models. It has not expanded beyond its original purpose of mandating revised icing procedures for PA-42 series aircraft."},"complexity_factors":["Single, clearly defined applicability (4 specific aircraft models with specific equipment)","Single straightforward requirement (insert this directive into the flight manual)","No defined terms section or interpretation provisions","No cross-references to other legislation (only a non-binding note referencing an FAA directive)","Clear, unambiguous compliance date","Simple conditional logic (when to activate/deactivate) presented in plain operational language rather than legal syntax"],"plain_english_summary":"This Airworthiness Directive orders owners/operators of Piper PA‑42 series aircraft with pneumatic de‑icing boots to revise their Aircraft Flight Manual with stricter icing procedures: activate boots at the first sign of ice or an ice‑detector alarm, operate in auto or manually cycle to prevent buildup, and keep them on until clear and visually checked. It affects pilots/operators and tightens guidance to prevent ice‑related loss of lift."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The text imposes procedural and AFM changes for the specified PA‑42 models with pneumatic de‑icing boots but does not expand or narrow the listed applicability or introduce new design requirements. There is no indication in the instrument that its scope departs from the stated applicability or that it alters certification beyond the AFM operational limitations."},"complexity_factors":["Direct operational mandate with clear steps for activation/deactivation (Requirement)","Ambiguity for operational judgment: what constitutes 'first sign of ice' and 'clear of ice' requires pilot interpretation (Requirement)","Requires an AFM amendment and physical insertion of the Directive (Requirement)","Short compliance window: 10 days after 13 September 2000 creates scheduling and administrative pressure for operators (Compliance)","Applies only to listed PA‑42 models equipped with pneumatic de‑icing boots — limits affected population but concentrates compliance on those operators (Applicability)","Imposes training/operational costs on operators to update procedures and crew behaviour (implicit in Requirement)","Cross-reference to FAA AD 2000-14-08 may affect harmonisation of procedures or follow-up actions (Note)","Issued under CASA delegate powers (preamble), so enforcement and any discretion sit with the regulator"],"plain_english_summary":"Adds a mandatory Aircraft Flight Manual (AFM) limitation for PA‑42 series aeroplanes fitted with pneumatic de‑icing boots, requiring activation at the first sign of ice or on detector annunciation, continued automatic or manual cycling to minimise ice accretion, and deactivation only after leaving and confirming clear of icing. Operators must insert this Directive into the AFM and comply within 10 days of 13 September 2000. The CASA delegate issues the requirement; aircraft operators bear the cost and must change crew procedures and training."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pa-42-25-airframe-pneumatic-de-icing-boots","history":"/api/acts/ad-pa-42-25-airframe-pneumatic-de-icing-boots/history","analysis":"/api/acts/ad-pa-42-25-airframe-pneumatic-de-icing-boots/analysis","conflicts":"/api/acts/ad-pa-42-25-airframe-pneumatic-de-icing-boots/conflicts","importantCases":"/api/acts/ad-pa-42-25-airframe-pneumatic-de-icing-boots/important-cases","documents":"/api/acts/ad-pa-42-25-airframe-pneumatic-de-icing-boots/documents"}}