{"id":"F2006B10073","name":"AD/G159/3 Amdt 1 - Flight Data Recorder and Flight Crew Compartment Voice Recorder - Installation","slug":"ad-g159-3-amdt-1-flight-data-recorder-and-flight-crew-compartment-voice-recorder-installation","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":55518,"registerId":"commonwealth-F2006B10073-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/G159/3 Amdt 1 - Flight Data Recorder and Flight Crew Compartment Voice Recorder - Installation","content":"---\nmeta-content-style-type: text/css\nmeta-content-type: application/xhtml+xml; charset=utf-8\nmeta-generator: Aspose.Words for .NET 22.10.0\n---\n\n?xml version=\"1.0\" encoding=\"utf-8\" standalone=\"no\"?>\n\n# COMMONWEALTH OF AUSTRALIA CIVIL AVIATION ORDERS CIVIL AVIATION SAFETY AUTHORITY                            PART 105 SCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n![](image.001.png)  GULFSTREAM (GRUMMAN) G.159 SERIES AEROPLANES\n\n \n\nAD/G159/3\n\nAmdt 1\n\n\nFlight Data Recorder and Flight Crew Compartment Voice Recorder - Installation\n\n\n10/73\n\n \n\nApplicability: All models. Requirement: Flight Data Recorder\n\n1. An approved Flight Data Recorder shall be installed. The recorder shall meet the\n\n\ncrash survival requirements of FAA Technical Standards Order C51a “AIRCRAFT FLIGHT RECORDERS”, and shall record data from which time, altitude, airspeed, vertical acceleration and heading may be determined within the ranges accuracies and at the recording intervals specified in FAA Technical Standard Order C51a except for vertical acceleration which shall be recorded at intervals of not more than one tenth of one second.\n\n2.    The recorder shall be installed so that it can be operated continuously from when the aircraft begins to taxi under its own power for the purpose of flight at least until the conclusion of taxiing after landing.\n\n3.    The recorder shall record data from which time correlation with the cockpit voice recorder can be established.\n\nNote: An acceptable means of compliance with this requirement is the recording of data to mark each radio transmission.\n\n# Voice Recorder\n\n4.    An approved voice recorder shall be installed. Compliance: Before 31 October 1973.\n\nNote: Aircraft already complying with the preceding issue of this directive at the time\n\nof issue of this issue of the directive are hereby deemed to satisfy the requirements of this issue.\n\n \n","sortOrder":0}],"analysis":{"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The instrument does not state an expanded applicability; it sets technical and timing installation standards and a CVR compliance date. A deeming clause says aircraft already meeting the prior issue are treated as compliant, which indicates the amendment refines installation/performance requirements rather than widening the affected fleet."},"complexity_factors":["References an external technical standard (FAA Technical Standard Order C51a) for crash‑survival and recording specifications","Specific technical recording requirements (parameters, accuracies and a strict vertical‑acceleration sampling interval of ≤0.1s)","Operational installation timing requirement (continuous operation from start of taxi to end of taxi after landing)","Requirement to enable time correlation between FDR and CVR, with an indicated acceptable means of compliance (marking radio transmissions)","A fixed compliance deadline for the voice recorder (31 October 1973)","Applicability to all models of the G.159 series with a deeming clause for aircraft already complying with the previous issue"],"plain_english_summary":"Mechanically, this directive requires all Gulfstream (Grumman) G.159 aeroplanes to be fitted with an approved Flight Data Recorder meeting FAA TSO C51a and an approved cockpit voice recorder. The FDR must record time, altitude, airspeed, vertical acceleration (at intervals no more than 0.1s) and heading, operate from taxi‑start until taxi concludes after landing, and allow time correlation with the CVR (for example by marking radio transmissions). The CVR must be installed by 31 October 1973. Aircraft owners/operators must fit and maintain the equipment to comply."},"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 is a straightforward amendment (Amdt 1) to an existing Airworthiness Directive. The scope remains tightly focused on mandating specific recording equipment for a particular aircraft series. The amendment appears to update technical requirements and add a compliance deadline without expanding beyond the original safety purpose."},"complexity_factors":["Very short document (approximately 250 words)","Only 4 numbered requirements plus 2 notes","No defined terms section","Minimal cross-referencing (only references to external FAA technical standard)","Simple conditional logic (single compliance deadline, single grandfathering clause in Note)","Clear structure with separate sections for Flight Data Recorder and Voice Recorder"],"plain_english_summary":"This rule requires all Gulfstream (Grumman) G.159 aircraft to be fitted with a Flight Data Recorder meeting FAA TSO‑C51a (continuous recording from taxi start to taxi end, with time/altitude/airspeed/heading/vertical acceleration and synchronization with the voice recorder) and an approved Cockpit Voice Recorder installed in the cockpit. It affects owners/operators, matters for accident investigation, and had a compliance deadline of 31 October 1973; prior-compliant aircraft remain compliant."}},"importantCases":[],"_links":{"self":"/api/acts/ad-g159-3-amdt-1-flight-data-recorder-and-flight-crew-compartment-voice-recorder-installation","history":"/api/acts/ad-g159-3-amdt-1-flight-data-recorder-and-flight-crew-compartment-voice-recorder-installation/history","analysis":"/api/acts/ad-g159-3-amdt-1-flight-data-recorder-and-flight-crew-compartment-voice-recorder-installation/analysis","conflicts":"/api/acts/ad-g159-3-amdt-1-flight-data-recorder-and-flight-crew-compartment-voice-recorder-installation/conflicts","importantCases":"/api/acts/ad-g159-3-amdt-1-flight-data-recorder-and-flight-crew-compartment-voice-recorder-installation/important-cases","documents":"/api/acts/ad-g159-3-amdt-1-flight-data-recorder-and-flight-crew-compartment-voice-recorder-installation/documents"}}