{"id":"F2006B03269","name":"AD/B747/91 - EFIS Control Panel","slug":"ad-b747-91-efis-control-panel","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":42693,"registerId":"commonwealth-F2006B03269-current","compilationNumber":null,"startDate":"2026-04-01","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/B747/91 - EFIS Control Panel","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/B747/91 EFIS Control Panel 6/91\n\nApplicability: All model 747-400 series with line numbers 1 through 791.\n\n \n\nRequirement: Action in accordance with the technical requirements of FAA AD 91-06-17.\n\nNote: Collins Service Bulletin No DCP-7000-31-04 also refers.\n\nCompliance: As specified in the Requirement Document.\n\n \n\nBackground: Country of Origin AD to prevent failure of either pilots EFIS control panel, with resultant smoke in the flight deck.\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\n \n\n \n\n \n","sortOrder":0}],"analysis":{"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"This AD adopts the country-of-origin (FAA) directive for the identified risk and applies it to the specified fleet (Boeing 747-400 line numbers 1–791). The instrument does not expand or narrow the technical scope beyond requiring compliance with FAA AD 91-06-17 and the referenced Collins service bulletin; it therefore preserves the original technical scope as stated in the referenced documents (Requirement; Note; Applicability)."},"complexity_factors":["Cross-reference to an external technical instrument (FAA AD 91-06-17) rather than setting detailed technical steps within the text (Requirement).","Reference to a manufacturer service bulletin (Collins DCP-7000-31-04) which may contain technical detail and parts information but is not reproduced here (Note).","Applicability is narrowly defined by model and line numbers, requiring operators to verify serial/line number applicability (Applicability).","Compliance timing and procedures are delegated to the referenced Requirement Document rather than specified in the AD, creating dependency on external documents (Compliance).","Potential operational impacts (downtime, parts, labour) are implied but not quantified in the AD, requiring operators to assess practical implementation costs themselves (Requirement; Compliance)."],"plain_english_summary":"What this instrument does (mechanically)\n\n- This is an airworthiness directive (AD) that requires operators of specified Boeing 747-400 aeroplanes to carry out the technical actions set out in a referenced FAA directive (FAA AD 91-06-17). (Requirement)\n- It applies to all Boeing 747-400 series aircraft with line numbers 1 through 791. (Applicability)\n- Compliance must be carried out as specified in the referenced Requirement Document. (Compliance)\n\nWhy it was issued (stated purpose)\n\n- The directive is adopted from the country of origin to prevent failure of either pilot’s EFIS (Electronic Flight Instrument System) control panel, which could cause smoke in the flight deck. This stated safety objective is given in the Background section. (Background)\n\nWho decides and who pays\n\n- The regulatory direction to act comes from the Civil Aviation Safety Authority (the AD itself) but the specific actions to be taken are determined by the referenced FAA AD and any associated service bulletin (FAA AD 91-06-17 and Collins Service Bulletin No DCP-7000-31-04). (Requirement; Note)\n- Aircraft operators (owners/operators) are the parties who must implement the work required by the referenced documents and therefore will bear the direct costs of inspections, repairs or modifications called for by those documents. (Requirement; Compliance)\n\nImmediate compliance consequences and behaviour changes\n\n- Affected operators must review the referenced FAA AD and execute the technical work specified there (inspections, repairs, or replacements) on each aeroplane within the applicability range. (Requirement; Compliance)\n- Operators must incorporate the mandated maintenance actions into their maintenance planning and record-keeping for the affected aircraft.\n\nIncentives, compliance burden and implementation risk (practical implications)\n\n- Incentives: Operators gain a clear regulatory signal to take action to reduce the risk of EFIS control panel failure and smoke in the flight deck; failure to comply would leave the operator in breach of the AD.\n- Compliance burden: The AD delegates the specific technical steps to the FAA AD and a Collins service bulletin, so operators must obtain, read and follow those documents. That creates administrative and technical costs: acquiring documents, scheduling maintenance, paying parts and labour, and possible aircraft downtime. (Requirement; Note; Compliance)\n- Discretion: The AD itself does not set alternative methods; any deviations would be subject to the usual custodial approval processes, but the AD directs compliance “as specified” in the referenced documents, limiting interpretive discretion at the AD level. (Requirement; Compliance)\n- Implementation risk: Because the AD incorporates external technical documents by reference, timely access to those documents and to qualified maintenance resources is necessary. If parts or specialised technicians are constrained, operators may face scheduling delays or higher costs. (Requirement; Note)\n\nEffects on private enterprise and markets\n\n- Maintenance providers and parts suppliers may see demand from operators who must carry out the mandated work. The Collins service bulletin is specifically referenced, which may concentrate technical remediation instructions around a particular supplier or set of procedures. (Note)\n- The AD does not itself change ownership, operating rights, or certification beyond requiring compliance for continued airworthiness of affected models. It does impose a compliance cost on operators and may indirectly affect aircraft availability and operating economics while work is performed. (Applicability; Requirement; Compliance)\n\nTrade-offs and opportunity costs\n\n- Operators must trade time and money for a reduced risk of EFIS control-panel failure and in-flight smoke in the flight deck. That reallocation of resources may displace other maintenance or operational investments during the period required to comply. (Background; Requirement)\n\nConcrete cross-references in the instrument\n\n- The AD requires actions “in accordance with the technical requirements of FAA AD 91-06-17.” (Requirement)\n- It additionally notes Collins Service Bulletin No DCP-7000-31-04 as a related document. (Note)\n- Applicability is limited to Boeing 747-400 line numbers 1 through 791. (Applicability)\n- Compliance timing and steps are those specified in the referenced Requirement Document. (Compliance)\n\nSummary sentence\n\n- In short: operators of Boeing 747-400s (line nos. 1–791) must carry out the maintenance or modification work set out in FAA AD 91-06-17 (and related Collins service bulletin) to address a risk of EFIS control panel failure that could produce smoke in the flight deck; the operator bears the cost and scheduling burden, and must follow the referenced technical documents for the precise actions and timing. (Applicability; Requirement; Note; Compliance; Background)"},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a standard, narrow airworthiness directive of the type routinely issued under Part 39 of the Civil Aviation Regulations. It addresses a specific equipment defect in specific aircraft models and does not represent scope creep from any original legislative intent. The incorporation by reference to FAA standards is standard practice in Australian aviation safety regulation."},"complexity_factors":["Extremely short document (under 200 words)","No defined terms section — relies entirely on external references","Single, straightforward applicability criterion (specific aircraft line numbers)","No conditional logic or nested exceptions","Core requirement is a simple incorporation by reference to FAA AD 91-06-17","No substantive legislative drafting — essentially a pointer to US regulatory requirements"],"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).\n\n**What it does:** It requires owners and operators of specific Boeing 747-400 aircraft (those with line numbers 1 through 791) to take corrective action on the **EFIS Control Panel**. EFIS stands for *Electronic Flight Instrument System* — the digital screens and controls that pilots use to see critical flight information like altitude, speed, and navigation data.\n\n**Why it matters:** The directive addresses a serious safety risk. If either pilot's EFIS control panel fails, it could cause **smoke in the flight deck (cockpit)**. Smoke in the cockpit can impair pilot visibility and create an emergency situation during flight.\n\n**What must be done:** Operators must follow the technical instructions in **FAA AD 91-06-17** — a matching safety order from the US aviation regulator. There's also a reference to a **Collins Service Bulletin** (technical repair guidance from the equipment manufacturer) for additional guidance.\n\n**Who it affects:** Airlines and operators flying Boeing 747-400 series aircraft with the specified production line numbers.\n\n**When compliance is required:** As specified in the original FAA document — meaning operators need to check that US directive for deadlines and specific procedures."}},"importantCases":[],"_links":{"self":"/api/acts/ad-b747-91-efis-control-panel","history":"/api/acts/ad-b747-91-efis-control-panel/history","analysis":"/api/acts/ad-b747-91-efis-control-panel/analysis","conflicts":"/api/acts/ad-b747-91-efis-control-panel/conflicts","importantCases":"/api/acts/ad-b747-91-efis-control-panel/important-cases","documents":"/api/acts/ad-b747-91-efis-control-panel/documents"}}