{"id":"F2006B03402","name":"AD/B767/49 - Collins Flight Control Computers","slug":"ad-b767-49-collins-flight-control-computers","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":42943,"registerId":"commonwealth-F2006B03402-current","compilationNumber":null,"startDate":"2026-04-01","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/B767/49 - Collins Flight Control Computers","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 767 Series Aeroplanes\n\n \n\nAD/B767/49 Collins Flight Control Computers 2/91\n\nApplicability: All models fitted with Collins flight control computers.\n\n \n\nRequirement: Inspect and/or modify as appropriate in accordance with the technical requirements of FAA AD 90-11-10 (Amdt 39-6608).\n\n \n\nCompliance: Part A. Prior to 31 December 1992.\n\n \n\nPart B.  Prior to 31 December 1991.\n\n \n\nBackground:  To prevent intermittent altitude hold, altitude capture, and/or flight director mistracking anomalies.\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":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, time-bound safety directive with a narrow, specific purpose. It has not expanded beyond its original intent of addressing a specific flight control computer anomaly in Boeing 767 aircraft."},"complexity_factors":["Very short document (approximately 150 words of substantive content)","Only 1 defined applicability criterion (aircraft model and equipment type)","Single cross-reference to external FAA technical document (AD 90-11-10)","Simple binary compliance structure (Part A and Part B with fixed dates)","No nested exceptions, conditional logic, or interpretive provisions","No internal definitions section"],"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 specific aircraft.\n\n**What it does:** It requires owners or operators of **Boeing 767 aeroplanes** fitted with **Collins flight control computers** to inspect and/or modify those computers. The work must follow the technical instructions set out in a US Federal Aviation Administration (FAA) directive (AD 90-11-10).\n\n**Who it affects:** Anyone operating a Boeing 767 in Australia that uses these specific flight control computers — typically airlines and cargo operators flying this aircraft type.\n\n**Why it matters:** The directive addresses a safety risk where the aircraft's **altitude hold** (keeping the plane at a set height), **altitude capture** ( smoothly transitioning to a new height), and **flight director** (the system that guides pilots) could malfunction intermittently. These anomalies could affect flight safety, so the directive mandates fixes by specific deadlines: **before 31 December 1991** for Part B requirements, and **before 31 December 1992** for Part A requirements.\n\n**In short:** If you fly a Boeing 767 with Collins computers in Australia, you had to get this safety fix done by the end of 1992 at the latest."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The instrument's scope is to require inspection and modification of Collins flight control computers on all Boeing 767 models fitted with that equipment to prevent specified flight-control anomalies. Nothing in the text indicates a change from that stated, original purpose: the AD applies broadly to affected aircraft (Applicability), requires compliance with FAA AD 90-11-10 (Requirement), and sets firm deadlines for completion (Compliance)."},"complexity_factors":["Single, clear applicability (all B767 models fitted with Collins flight control computers) (Applicability)","Directive delegates technical detail to an external document (FAA AD 90-11-10), requiring cross-reference (Requirement)","Two-tiered compliance schedule with different deadlines (Compliance: Part B; Compliance: Part A)","No technical procedures included in the text — implementers must obtain and interpret the FAA AD (Requirement)","No exemptions, alternatives, or implementation guidance included in this instrument (Requirement)"],"plain_english_summary":"This AD requires inspection and, if necessary, modification of Collins flight‑control computers on all Boeing 767s to prevent intermittent altitude‑hold, altitude‑capture and flight‑director mistracking anomalies. Operators must arrange and fund the work and follow the technical procedures in FAA AD 90‑11‑10. Compliance is staged, with required actions to be completed by the end of 1991 and by the end of 1992."}},"importantCases":[],"_links":{"self":"/api/acts/ad-b767-49-collins-flight-control-computers","history":"/api/acts/ad-b767-49-collins-flight-control-computers/history","analysis":"/api/acts/ad-b767-49-collins-flight-control-computers/analysis","conflicts":"/api/acts/ad-b767-49-collins-flight-control-computers/conflicts","importantCases":"/api/acts/ad-b767-49-collins-flight-control-computers/important-cases","documents":"/api/acts/ad-b767-49-collins-flight-control-computers/documents"}}