{"id":"F2006B02957","name":"AD/B737/58 - Magnetic Standby Compass Liner","slug":"ad-b737-58-magnetic-standby-compass-liner","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":42299,"registerId":"commonwealth-F2006B02957-current","compilationNumber":null,"startDate":"2026-04-01","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/B737/58 - Magnetic Standby Compass Liner","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 737 Series Aeroplanes\n\n \n\nAD/B737/58  Magnetic Standby Compass Liner 7/91 Applicability:              All model 737 aeroplanes line numbers 1683, 1687, 1693, 1697 & 1700 thru 1769. Requirement:               Action in accordance with the Technical Requirements of FAA AD 91-07-14.\n\nCompliance: Prior to 31 August 1991.\n\n \n\nBackground: To prevent a high voltage electrical shock hazard to flight deck personnel.\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\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 scope (particular Boeing 737 line numbers, single defect, single compliance deadline). No scope creep is evident; it addresses exactly one safety issue as originally intended."},"complexity_factors":["Extremely short document (under 200 words)","Only 5 defined elements (applicability, requirement, compliance, background, and reference to external FAA directive)","No nested conditional logic or exceptions","Single cross-reference to external FAA AD 91-07-14 (the actual technical requirements are contained there, not here)","No interpretation section or defined terms","Straightforward command structure: identify affected aircraft → apply external standard → meet deadline"],"plain_english_summary":"This is an **Airworthiness Directive** (a mandatory safety order) issued by Australia's Civil Aviation Safety Authority for **Boeing 737 aircraft**.\n\n**What it does:**\nOrders airlines and aircraft operators to fix a safety problem with the **magnetic standby compass liner** on specific Boeing 737 planes (line numbers 1683, 1687, 1693, 1697, and 1700 through 1769).\n\n**The safety risk:**\nThe faulty compass liner could expose flight deck crew to **high voltage electrical shocks**.\n\n**What operators must do:**\nFollow the technical instructions in the corresponding US Federal Aviation Administration directive (FAA AD 91-07-14) to fix the problem.\n\n**Deadline:**\nAll affected aircraft had to be fixed **before 31 August 1991**.\n\n**Who it affects:**\nAirlines and operators flying the specific Boeing 737 models listed above.\n\n**Why it matters:**\nThis directive prevents potentially fatal electrical hazards in the cockpit, protecting pilots and crew during flight operations."},"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"The AD, as written, implements the technical requirements of FAA AD 91-07-14 for the specific list of Boeing 737 line numbers and sets a completion deadline. The text contains no indication that its scope was altered from its stated purpose of preventing a high-voltage electrical shock hazard to flight-deck personnel (Applicability; Requirement; Compliance; Background)."},"complexity_factors":["Narrow applicability limited to specific Boeing 737 line numbers (Applicability).","External reference to FAA AD 91-07-14 for technical detail increases procedural dependency (Requirement).","Fixed compliance deadline imposes scheduling and downtime constraints (Compliance).","Directive is short and prescriptive; it does not itself set out technical steps, increasing reliance on another instrument (Requirement).","Safety-critical subject matter increases oversight and potential administrative record-keeping but does not add legislative complexity in text (Background)."],"plain_english_summary":"This AD requires owners/operators of specific Boeing 737 airframes (listed line numbers) to complete the technical actions set out in FAA AD 91‑07‑14 by 31 August 1991.  \n\nIt imposes the compliance obligation and costs on those owners/operators to eliminate a high‑voltage electrical shock hazard to flight‑deck personnel, while relying on the FAA document for the precise technical steps."}},"importantCases":[],"_links":{"self":"/api/acts/ad-b737-58-magnetic-standby-compass-liner","history":"/api/acts/ad-b737-58-magnetic-standby-compass-liner/history","analysis":"/api/acts/ad-b737-58-magnetic-standby-compass-liner/analysis","conflicts":"/api/acts/ad-b737-58-magnetic-standby-compass-liner/conflicts","importantCases":"/api/acts/ad-b737-58-magnetic-standby-compass-liner/important-cases","documents":"/api/acts/ad-b737-58-magnetic-standby-compass-liner/documents"}}