{"id":"F2011L00526","name":"AD/G1159/52 - Avionics Standard Communication Bus","slug":"ad-g1159-52-avionics-standard-communication-bus","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":86004,"registerId":"commonwealth-F2011L00526-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Gulfstream (Grumman) G1159 and G-IV Seri","sectionType":"division","heading":"Gulfstream (Grumman) G1159 and G-IV Series Aeroplanes","content":"### Gulfstream (Grumman) G1159 and G-IV Series Aeroplanes\n\n| AD/G1159/52 | Avionics Standard Communication Bus | 7/2011 |\n| ----------- | ----------------------------------- | ------ |\n\n| Applicability: | Model GV-SP with serial number in the range 5001 through 5062 inclusive.                                                                                                                                                  |\n| -------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement:   | Actions specified in FAA Airworthiness Directive 2005-04-06 (Amendment39-13978).                                                                                                                                          |\n| Compliance:    | Unless already accomplished, perform initial inspection before issue of certificate of airworthiness. Unless terminating action has been accomplished, perform repetitive inspections at intervals not exceeding 60 days. |\n|                | This Airworthiness Directive becomes effective on 30 March 2011.                                                                                                                                                          |\n| Background:    | The FAA issued 2005-04-06 after receiving a report that all four cockpit flight panel displays went blank simultaneously.                                                                                                 |\n\n![](image.001.png)\n\nCharles Lenarcic  \nDelegate of the Civil Aviation Safety Authority\n\n24 March 2011","sortOrder":0},{"sectionNumber":"AD/G1159/52","sectionType":"part","heading":"AD/G1159/52","content":"## AD/G1159/52","sortOrder":1},{"sectionNumber":"Avionics Standard Communication Bus","sectionType":"part","heading":"Avionics Standard Communication Bus","content":"## Avionics Standard Communication Bus","sortOrder":2},{"sectionNumber":"7/2011","sectionType":"part","heading":"7/2011","content":"## 7/2011","sortOrder":3}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a standard Airworthiness Directive with narrow, targeted scope. It addresses a specific safety defect in a specific aircraft model range, which is exactly what ADs are designed to do. No scope creep detected."},"complexity_factors":["Extremely short document (under 300 words)","Only 1 defined applicability criterion (serial number range)","Single cross-reference to external FAA directive (2005-04-06)","Simple binary compliance structure: initial inspection + repetitive inspection","No nested exceptions or conditional logic","Clear, unambiguous deadline (effective date and 60-day intervals)"],"plain_english_summary":"This AD mandates inspections of the avionics standard communication bus on Gulfstream GV‑SP jets (S/N 5001–5062). A required initial inspection must be completed before issuing the aircraft’s certificate of airworthiness, and, absent a terminating fix, checks must be repeated every 60 days.  \n\nIt targets owners/operators of these 62 jets to prevent wiring faults that could cause all four cockpit displays to go blank in flight."},"flash_summary":{"complexity_score":4,"scope_assessment":{"changed":false,"description":"Scope remains confined to Model GV‑SP serial numbers 5001–5062 and implements the FAA AD actions. The directive requires an inspection before issue of the certificate of airworthiness and repeated inspections every 60 days until the terminating action in the FAA AD is accomplished; it does not expand applicability beyond the stated serial‑number range."},"complexity_factors":["Cross-reference to FAA AD 2005‑04‑06 rather than reproducing technical requirements increases reliance on external document interpretation (Requirement).","Applicability limited to a narrow serial‑number range (5001–5062), requiring careful operator tracking (Applicability).","Mandatory initial inspection before certificate of airworthiness adds timing sensitivity for new or modified aircraft (Compliance).","Repetitive inspections every 60 days create ongoing operational and maintenance burden until a terminating action is performed (Compliance).","The directive does not specify the terminating action in this text, so operators must consult the FAA AD for corrective measures (Requirement).","Safety‑critical avionics fault (simultaneous cockpit display blanking) implies potential for aircraft grounding or repair costs (Background).","Effective date and delegation to the Civil Aviation Safety Authority require administrators and operators to coordinate compliance quickly (effective 30 March 2011)."],"plain_english_summary":"This Airworthiness Directive requires owners/operators of Gulfstream GV‑SP aeroplanes (serials 5001–5062) to carry out the actions set out in FAA AD 2005‑04‑06 to address a fault in the avionics standard communication bus. An initial inspection must be done before issue of the certificate of airworthiness and, unless a terminating fix is completed, inspections must be repeated at intervals not exceeding 60 days. (Applicability; Requirement; Compliance; Background)"},"flash_summary_failed":{"failed":true,"reason":"Unauthenticated. Configure AI_GATEWAY_API_KEY or use a provider module. Learn more: https://ai-sdk.dev/unauthenticated-ai-gateway","source":"analysis-cron"}},"importantCases":[],"_links":{"self":"/api/acts/ad-g1159-52-avionics-standard-communication-bus","history":"/api/acts/ad-g1159-52-avionics-standard-communication-bus/history","analysis":"/api/acts/ad-g1159-52-avionics-standard-communication-bus/analysis","conflicts":"/api/acts/ad-g1159-52-avionics-standard-communication-bus/conflicts","importantCases":"/api/acts/ad-g1159-52-avionics-standard-communication-bus/important-cases","documents":"/api/acts/ad-g1159-52-avionics-standard-communication-bus/documents"}}