{"id":"F2025L00024","name":"AD/GA8/12 Powerplant Instrumentation and Limitations Maintenance and Operational Manual Amendment 2/2025","slug":"ad-ga8-12-powerplant-instrumentation-and-limitations-maintenance-and-operational-manual-amendment-2-","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":105807,"registerId":"commonwealth-F2025L00024-current","compilationNumber":null,"startDate":"2026-04-03","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"GippsAero GA8 Series Aeroplanes","sectionType":"part","heading":"GippsAero GA8 Series Aeroplanes","content":"# GippsAero GA8 Series Aeroplanes\n\n| AD/GA8/12 | Powerplant Instrumentation and Limitations Maintenance and Operational Manual Amendment | 2/2025 |\n| --------- | --------------------------------------------------------------------------------------- | ------ |\n\n| Applicability: | All GA8 aircraft as identified in Table 1 of GippsAero Service Bulletin SB-GA8-2024-218 Issue 1, dated 11 July 2024, as in force on the date of commencement of this Airworthiness Directive (AD).                                                                                                                                                                                                                                                                                                                        |\n| -------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement:   | For aircraft that have been modified in accordance with GippsAero Service Bulletin SB-GA8-2011-66 Issue 60, dated 5 June 2023 (or earlier approved issue), accomplish the requirements of GippsAero Service Bulletin SB-GA8-2024-218 Issue 1, dated 11 July 2024, as in force on the date of commencement of this AD.                                                                                                                                                                                                     |\n| Compliance:    | Unless previously accomplished, within 100 hours flight time or six months, whichever occurs first, from the commencement date of this AD.                                                                                                                                                                                                                                                                                                                                                                                |\n|                | This AD commences on 31 January 2025.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     |\n| Background:    | A documentation review of Service Bulletin SB-GA8-2011-66 Issue 60 has identified a discrepancy in performance data for the affected aircraft: Take-off charts may require engine RPM which exceeds the engine limitations provided in Section 2 of the applicable Flight Manual. Hence, Service Bulletin SB-GA8-2024-218 Issue 1 has been introduced to correct the issue for the affected aircraft.This AD is issued to give legal effect for the corrective actions given in Service Bulletin SB-GA8-2024-218 Issue 1. |\n\n![Signature of CASA delegate.](image.001.jpeg)\n\nDavid Punshon  \nDelegate of the Civil Aviation Safety Authority\n\n16 January 2025","sortOrder":0},{"sectionNumber":"AD/GA8/12","sectionType":"part","heading":"AD/GA8/12","content":"## AD/GA8/12","sortOrder":1},{"sectionNumber":"Powerplant Instrumentation and Limitatio","sectionType":"part","heading":"Powerplant Instrumentation and Limitations Maintenance and Operational Manual Amendment","content":"## Powerplant Instrumentation and Limitations Maintenance and Operational Manual Amendment","sortOrder":2},{"sectionNumber":"2/2025","sectionType":"part","heading":"2/2025","content":"## 2/2025","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 AD maintains its original narrow scope — correcting a specific documentation discrepancy for a specific aircraft type that underwent a specific prior modification. There is no evidence of scope creep; it precisely targets the identified RPM mismatch issue without expanding to unrelated systems or aircraft."},"complexity_factors":["Single, specific applicability criterion (aircraft modified under one specific Service Bulletin)","Only one substantive requirement (comply with another named document)","Simple compliance timeframe (100 hours or 6 months, whichever first)","No defined terms section, no cross-references to legislation, no conditional exceptions","Straightforward background explanation of the safety issue","Total length is approximately 200 words of operative text"],"plain_english_summary":"This AD requires owners/operators of affected GippsAero GA8 aeroplanes (those modified under SB‑GA8‑2011‑66 as listed) to amend maintenance and flight manuals per Service Bulletin SB‑GA8‑2024‑218 to correct take‑off chart RPMs that could exceed safe engine limits. Compliance is mandatory within 100 flight hours or six months from 31 Jan 2025. It’s a documentation correction to prevent engine over‑rev and potential failure."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The AD formalises and limits legal effect to the corrective actions described in SB-GA8-2024-218 Issue 1 for GA8 aircraft modified under SB-GA8-2011-66 Issue 60. It does not broaden requirements beyond those affected aircraft or amend other airworthiness standards; it converts a manufacturer's corrective bulletin into a mandatory directive (Applicability; Requirement; Background)."},"complexity_factors":["Targeted applicability requires checking aircraft against Table 1 of SB-GA8-2024-218 and modification history under SB-GA8-2011-66 Issue 60, creating a verification burden for operators (Applicability; Requirement).","Mandates incorporation of a separate manufacturer service bulletin into aircraft manuals, tying compliance to an external document and its exact issue (Requirement; Background).","Short, dual compliance deadline (100 flight hours or six months from commencement) increases scheduling pressure for operators and maintainers (Compliance).","Legal effect: the AD converts a corrective service bulletin into a mandatory regulatory requirement, changing compliance from recommended to compulsory (Background).","Implementation may impose modest maintenance/administrative costs to amend manuals and verify performance charts, borne by aircraft owners/operators (Requirement; Background).","Enforcement and commencement are set by CASA (signed delegate), leaving standard administrative discretion for execution and oversight (Commencement; signature)."],"plain_english_summary":"This Airworthiness Directive requires operators of certain GippsAero GA8 aeroplanes (those modified under SB-GA8-2011-66 Issue 60) to implement the corrections in GippsAero Service Bulletin SB-GA8-2024-218 Issue 1 into their powerplant instrumentation, limitations, maintenance and operational manual. The change fixes take‑off charts that might call for engine RPM above the engine limits. Compliance is mandatory within 100 flight hours or six months from 31 January 2025 (Applicability; Requirement; Compliance; Background)."}},"importantCases":[],"_links":{"self":"/api/acts/ad-ga8-12-powerplant-instrumentation-and-limitations-maintenance-and-operational-manual-amendment-2-","history":"/api/acts/ad-ga8-12-powerplant-instrumentation-and-limitations-maintenance-and-operational-manual-amendment-2-/history","analysis":"/api/acts/ad-ga8-12-powerplant-instrumentation-and-limitations-maintenance-and-operational-manual-amendment-2-/analysis","conflicts":"/api/acts/ad-ga8-12-powerplant-instrumentation-and-limitations-maintenance-and-operational-manual-amendment-2-/conflicts","importantCases":"/api/acts/ad-ga8-12-powerplant-instrumentation-and-limitations-maintenance-and-operational-manual-amendment-2-/important-cases","documents":"/api/acts/ad-ga8-12-powerplant-instrumentation-and-limitations-maintenance-and-operational-manual-amendment-2-/documents"}}