{"id":"F2006B10858","name":"AD/INST/8 Amdt 4 - Instruments in VFR Aircraft","slug":"ad-inst-8-amdt-4-instruments-in-vfr-aircraft","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":56354,"registerId":"commonwealth-F2006B10858-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Instruments and Automatic Pilots","sectionType":"part","heading":"Instruments and Automatic Pilots","content":"# Instruments and Automatic Pilots\n\nAD/INST/8 Amdt 4 (continued)\n\nThe requirements and intervals of AD/INST/8 Amdt 3 have been retained for those operators who wish to continue to maintain their aircraft instruments in accordance with the requirements of Amdt 3 and intervals in the interim period until the CASR Part 43 and Part 91 come into effect.\n\n![Signature of Jim Coyne Delegate of the Civil Aviation Safety Authority](image.002.png)  \n\nJim Coyne\n\nDelegate of the Civil Aviation Safety Authority 26 June 2003\n\n![](image.001.png)","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":2153},"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"This amendment maintains the existing scope of instrument checking requirements for VFR aircraft. It functions as a corrective and transitional update—fixing reference data and removing outdated material while preserving the previous version's requirements temporarily until new aviation safety regulations (CASR Parts 43 and 91) took effect."},"complexity_factors":["Multiple external regulatory references requiring cross-checking (Civil Aviation Orders Sections 108.6 and 108.56, Airworthiness Directive AD/INST/9, Civil Aviation Regulation 42M)","Dual compliance pathways (alternative methods under (a) or (b))","Dual interval options (fixed 3-year period vs. variable maintenance system intervals)","Transitional retention of superseded version creating parallel compliance tracks"],"plain_english_summary":"This rule requires regular accuracy and integrity checks of basic flight instruments—airspeed indicators, altimeters, fuel gauges, compasses and pitot‑static systems—in light VFR aircraft, typically every three years or per an approved maintenance schedule. It lets operators comply via specified Civil Aviation Order provisions or an alternative airworthiness directive (AD/INST/9). The aim is to prevent dangerous instrument errors; a transitional period let operators keep following the prior rules while new regulations rolled in."}},"importantCases":[],"_links":{"self":"/api/acts/ad-inst-8-amdt-4-instruments-in-vfr-aircraft","history":"/api/acts/ad-inst-8-amdt-4-instruments-in-vfr-aircraft/history","analysis":"/api/acts/ad-inst-8-amdt-4-instruments-in-vfr-aircraft/analysis","conflicts":"/api/acts/ad-inst-8-amdt-4-instruments-in-vfr-aircraft/conflicts","importantCases":"/api/acts/ad-inst-8-amdt-4-instruments-in-vfr-aircraft/important-cases","documents":"/api/acts/ad-inst-8-amdt-4-instruments-in-vfr-aircraft/documents"}}