{"id":"F2006B07468","name":"AD/TPE 331/59 - Electronic Engine Controls","slug":"ad-tpe-331-59-electronic-engine-controls","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":49848,"registerId":"commonwealth-F2006B07468-current","compilationNumber":null,"startDate":"2026-04-02","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/TPE 331/59 Electronic Engine Controls","sectionType":"part","heading":"AD/TPE 331/59 Electronic Engine Controls 13/2001","content":"# AD/TPE 331/59 Electronic Engine Controls 13/2001\n\nDM\n\nApplicability: TPE331-8, \\-10N, and \\-12B turboprop engines with electronic engine controls (EEC's) part numbers (P/N's) 2101322-1, -4, -11, -12, -13, -14, -15 or -16 installed.\n\nNote 1: These engines are installed on but not limited to Cessna Aircraft Company Model 441 Conquest aeroplanes.\n\nRequirement: 1. If not previously accomplished, amend the applicable Aircraft Flight Manual (AFM) Emergency Procedures and Normal Procedures Section to provide interim emergency procedures to flight crews, by inserting the Temporary Revisions (TR) specified in the following table:","sortOrder":1}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"This appears to be a standard, targeted Airworthiness Directive addressing a specific unsafe condition in specific engine models. The scope remains tightly focused on the identified safety issue with electronic engine controls in the specified TPE331 engine variants."},"complexity_factors":["Single, specific applicability criteria (three engine models, eight specific part numbers)","Straightforward compliance action (insert temporary revisions into flight manual)","No nested exceptions or conditional logic beyond 'if not previously accomplished'","Short document with minimal cross-referencing","Clear, singular requirement with defined compliance method"],"plain_english_summary":"This CASA Airworthiness Directive mandates inserting temporary revisions into Aircraft Flight Manuals for aircraft with Honeywell TPE331-8, -10N, or -12B engines whose electronic engine controls have certain part numbers. It’s a legally binding safety action to give pilots updated emergency procedures for potential EEC failures.\n\nIt doesn’t require physical engine modification but is required to keep the aircraft airworthy."},"flash_summary":{"complexity_score":4,"scope_assessment":{"changed":false,"description":"The AD, as presented, targets a defined subset of TPE331 engines with specified EEC part numbers and requires insertion of Temporary Revisions into the AFM. The text does not indicate any expansion or narrowing beyond that stated applicability (Applicability; Requirement)."},"complexity_factors":["Narrow technical applicability limited to specific engine models and listed EEC part numbers (Applicability).","Mandates procedural change to Aircraft Flight Manual by inserting Temporary Revisions (Requirement 1).","Legal authority and enforcement by CASA delegate under subregulation 39.1(1) of CAR 1998 (introductory paragraph).","Compliance timing and exact actions are referenced to separate 'Compliance' and 'Requirement' sections and to a table of TRs not reproduced here, creating dependence on external documents (Requirement; Compliance).","Operational and administrative burden falls on aircraft operators/owners to update manuals and adopt interim procedures (Requirement; Applicability)."],"plain_english_summary":"This Airworthiness Directive obliges operators of TPE331-8, -10N and -12B turboprop engines fitted with electronic engine controls (EECs) having P/Ns 2101322-1, -4, -11, -12, -13, -14, -15 or -16 to amend the Aircraft Flight Manual (Emergency and Normal Procedures) by inserting specified Temporary Revisions (TRs). CASA’s delegate issues the AD under subreg 39.1(1) of CAR 1998; the document places compliance costs and procedural changes on aircraft owners/operators and sets the timing and instructions in the AD’s Requirement and Compliance sections."}},"importantCases":[],"_links":{"self":"/api/acts/ad-tpe-331-59-electronic-engine-controls","history":"/api/acts/ad-tpe-331-59-electronic-engine-controls/history","analysis":"/api/acts/ad-tpe-331-59-electronic-engine-controls/analysis","conflicts":"/api/acts/ad-tpe-331-59-electronic-engine-controls/conflicts","importantCases":"/api/acts/ad-tpe-331-59-electronic-engine-controls/important-cases","documents":"/api/acts/ad-tpe-331-59-electronic-engine-controls/documents"}}