{"id":"F2006B03002","name":"AD/B747/101 - Radio Control Panels","slug":"ad-b747-101-radio-control-panels","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":42361,"registerId":"commonwealth-F2006B03002-current","compilationNumber":null,"startDate":"2026-04-01","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/B747/101 - Radio Control Panels","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\nCOMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n \n\n![](image.001.png)  Boeing 747 Series Aeroplanes\n\n \n\nAD/B747/101 Radio Control Panels 2/92\n\nApplicability: Boeing 747-400 series aircraft equipped with Boeing part number 285U0037-104, - 105, -201, -202 or -203 series radio control panels.\n\n \n\nRequirement: Remove radio control panels, part numbered 285U0037-104, -105, -201, -202 and - 203 and replace with part numbers 285U0037-304, -305,-301, -302 and -303 respectively.\n\n \n\nNote: FAA AD 91-21-12 refers.\n\n \n\nCompliance: Prior to 12 January 1993.\n\n \n\nBackground: Country of origin AD. To prevent uncommanded frequency changes of the high frequency (HF) and very high frequency (VHF) radios.\n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, time-bound safety directive. It has not grown beyond its original purpose — it addresses one specific technical fault in one aircraft type with a straightforward replacement requirement."},"complexity_factors":["Very short document — only 8 substantive lines","No defined terms section","No cross-references to other legislation (only a reference to a related US FAA directive)","Simple conditional logic: if you have these specific part numbers, you must replace them","Single, unambiguous compliance action with a hard deadline","No exceptions, exemptions, or nested conditions"],"plain_english_summary":"**What this is:** This is an Airworthiness Directive (AD) — essentially a mandatory safety order issued by Australia's Civil Aviation Safety Authority (CASA) for aircraft.\n\n**What it does:** It requires airlines and aircraft operators to replace specific radio control panels on Boeing 747-400 aircraft. The old panels (part numbers ending in -104, -105, -201, -202, and -203) must be swapped out for newer versions (ending in -304, -305, -301, -302, and -303).\n\n**Who it affects:** Anyone operating Boeing 747-400 aircraft in Australia that have these specific radio control panels installed.\n\n**Why it matters:** The old panels had a dangerous fault — they could cause radios to change frequencies unexpectedly (\"uncommanded frequency changes\"). This could cut off communication between pilots and air traffic control, which is obviously a serious safety risk when you're flying a jumbo jet.\n\n**The deadline:** Operators had to complete this replacement before 12 January 1993.\n\n**Where it came from:** This directive was based on an American safety order (FAA AD 91-21-12), since the aircraft are American-made."},"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"The directive's scope is limited to replacing specified radio control panels on certain Boeing 747-400 aircraft to address the risk of uncommanded radio frequency changes. The instrument's stated action, applicability and deadline all align with that stated safety objective; there is no indication in the text that the scope has been expanded or narrowed from that objective. (Applicability; Requirement; Background)"},"complexity_factors":["Narrow applicability limited to Boeing 747-400 series with specific part numbers (straightforward identification). (Applicability)","Single, explicit technical action: remove listed parts and replace with specific new part numbers (one-to-one mapping). (Requirement)","Single, fixed compliance deadline with no conditional alternatives or phased compliance specified. (Compliance)","No procedural or record-keeping detail provided in the text (reduces legislative complexity but shifts operational detail to implementers). (Requirement; Compliance)","Reference to foreign (FAA) AD for origin but no additional domestic procedural overlay. (Note)"],"plain_english_summary":"This directive requires operators of Boeing 747‑400s fitted with listed radio control panel part numbers to remove them and install the specified updated part‑number replacements before 12 January 1993, implementing a CASA measure that mirrors FAA AD 91‑21‑12. \n\nIts stated purpose is to prevent uncommanded HF and VHF frequency changes; maintenance organisations perform the replacements and operators must comply, while costs and post‑installation verification are not addressed in the text."}},"importantCases":[],"_links":{"self":"/api/acts/ad-b747-101-radio-control-panels","history":"/api/acts/ad-b747-101-radio-control-panels/history","analysis":"/api/acts/ad-b747-101-radio-control-panels/analysis","conflicts":"/api/acts/ad-b747-101-radio-control-panels/conflicts","importantCases":"/api/acts/ad-b747-101-radio-control-panels/important-cases","documents":"/api/acts/ad-b747-101-radio-control-panels/documents"}}