{"id":"F2017L00535","name":"AD/PW100/5 Amdt 2 - Intercompressor Case Fire","slug":"ad-pw100-5-amdt-2-intercompressor-case-fire","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":96310,"registerId":"commonwealth-F2017L00535-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Pratt and Whitney Canada Turbine Engines","sectionType":"part","heading":"Pratt and Whitney Canada Turbine Engines - PW100 Series","content":"# Pratt and Whitney Canada Turbine Engines - PW100 Series\n\n| AD/PW100/5 Amdt 2 | Intercompressor Case Fire | 10/2017 |\n| ----------------- | ------------------------- | ------- |\n\n| Applicability: | Pratt and Whitney Canada PW118A, PW123, PW123AF, PW124B, PW125B, PW126 and PW126A engines.                                                                                                                                                                                                                  |\n| -------------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement:   | Action in accordance with the Technical Requirements of Transport Canada Airworthiness Directive CF-91-26R1 as in force at the commencement of this AD.                                                                                                                                                     |\n| Compliance:    | Effective 6 March 1992; as detailed in the Requirement Document.                                                                                                                                                                                                                                            |\n|                | This AD commences on 26 May 2017.Note 1: Compliance with Amendment 1 of this AD remains unchanged.                                                                                                                                                                                                          |\n| Background:    | Amendment 1 of this AD was issued to reflect a revision to the Requirement Document. The revision, in part, added the PW118A model, included an inspection requirement and detailed a termination action.Amendment 2 of the AD corrects the model number for PW126A engines in the applicability of the AD. |\n\n![](image.001.jpeg)\n\nPieter van Dijk  \nDelegate of the Civil Aviation Safety Authority\n\n12 May 2017","sortOrder":0},{"sectionNumber":"AD/PW100/5 Amdt 2","sectionType":"part","heading":"AD/PW100/5 Amdt 2","content":"## AD/PW100/5 Amdt 2","sortOrder":1},{"sectionNumber":"Intercompressor Case Fire","sectionType":"part","heading":"Intercompressor Case Fire","content":"## Intercompressor Case Fire","sortOrder":2},{"sectionNumber":"10/2017","sectionType":"part","heading":"10/2017","content":"## 10/2017","sortOrder":3}],"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":2,"scope_assessment":{"changed":false,"description":"This amendment does not change the scope. It is a minor typographical correction to the engine model designation (PW126A) in the applicability section. The original intent — mandating safety actions for intercompressor case fire risks in PW100 series engines — remains unchanged since the original 1992 directive."},"complexity_factors":["Very short document (approximately 200 words of substantive content)","Only 1 defined term implicitly referenced (the Canadian AD CF-91-26R1)","Single operative requirement: comply with an external document","No nested conditional logic or exceptions","Minimal cross-referencing (one reference to Transport Canada directive)","Straightforward applicability table with 7 specific engine models","Amendment is purely corrective (typo fix), not substantive"],"plain_english_summary":"This CASA Airworthiness Directive mandates that operators and maintenance organisations for certain Pratt & Whitney Canada PW100 series engines comply with the Canadian AD CF-91-26R1 to mitigate the risk of intercompressor‑case fires. Amendment 2 is a minor technical correction fixing a PW126A model typo in the applicability list; it does not change the safety requirements."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"Amendment 2 corrects the model number for PW126A in the applicability (Background) and does not add new obligations beyond those already imposed by following the Transport Canada Requirement Document (Requirement). The substantive compliance obligations remain as previously set (Compliance/Background)."},"complexity_factors":["External technical dependency: mandates action “in accordance with the Technical Requirements of Transport Canada Airworthiness Directive CF-91-26R1” (Requirement).","Multiple models listed in applicability increasing operator identification burden (Applicability).","Amendment history and erratum: Amendment 2 only corrects model numbering, while Amendment 1 added models and inspection/termination actions, requiring attention to version history (Background).","Compliance timing: separate effective date (6 March 1992) and commencement date for this amendment (26 May 2017) can cause record-keeping complexity (Compliance).","Delegated technical detail: this AD does not reproduce technical steps; operators must obtain and interpret the external Requirement Document, creating administrative and potential interpretation costs (Requirement/Compliance)."],"plain_english_summary":"This airworthiness directive requires operators and maintenance organisations of specified Pratt & Whitney PW100‑series engines to carry out the inspections and corrective actions set out in Transport Canada Airworthiness Directive CF‑91‑26R1 to address intercompressor‑case fire risk. It applies to PW118A, PW123, PW123AF, PW124B, PW125B, PW126 and PW126A engines and makes compliance mandatory from the stated effective dates. Operators pay for inspections/repairs and must follow the external Requirement Document to remain compliant."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pw100-5-amdt-2-intercompressor-case-fire","history":"/api/acts/ad-pw100-5-amdt-2-intercompressor-case-fire/history","analysis":"/api/acts/ad-pw100-5-amdt-2-intercompressor-case-fire/analysis","conflicts":"/api/acts/ad-pw100-5-amdt-2-intercompressor-case-fire/conflicts","importantCases":"/api/acts/ad-pw100-5-amdt-2-intercompressor-case-fire/important-cases","documents":"/api/acts/ad-pw100-5-amdt-2-intercompressor-case-fire/documents"}}