{"id":"F2020L01121","name":"AD/GC-1/2 Main Landing Gear Retraction System - Inspection","slug":"ad-gc-1-2-main-landing-gear-retraction-system-inspection","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":113535,"registerId":"commonwealth-F2020L01121-current","compilationNumber":null,"startDate":"2026-04-03","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Swift Museum Foundation GC-1A and GC-1B ","sectionType":"part","heading":"Swift Museum Foundation GC-1A and GC-1B Series Aeroplanes","content":"# Swift Museum Foundation GC-1A and GC-1B Series Aeroplanes\n\n| AD/GC-1/2 | Main Landing Gear RetractionSystem - Inspection | 18/2020 |\n| --------- | ----------------------------------------------- | ------- |\n\n| Applicability: | All Swift Museum Foundation GC-1A and GC-1B model aircraft. |\n| -------------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement: | 1. Inspect the main landing gear retraction system to determine that adjustments are as follows:a. When the side brace is against the down stop the middle joint is 1/8 inch to 1/4 inch above dead centre (3/16 inch to 5/16 inch when measured from edges of links in accordance with Globe Customer Service Maintenance Bulletin No. 7, as in force from time to time).b. When the side brace is against the down stop and the down lock plunger is fully extended, covering at least 1/2 of the adjustment screw head, the clearance between the plunger and the screw head is from 0.001 inch to 0.005 inch.c. When the side brace is against the down stop the limit switch plunger is depressed approximately 1/32 inch beyond the cutoff point.d. The turnbuckle in the emergency extension cable is positioned so that on manual extension of the gear, both down locks operate before the handcrank has been wound to the full down position. After it has been determined that the turnbuckle position is satisfactory in this respect it should be determined that with the handcrank wound to the full up position the cable length is sufficient to permit the up limit switches to cut off.Note 1: United States of America Federal Aviation Administration (FAA) AD 47‑06‑01 is the source document for the requirements of this AD.Note 2: The words “as in force from time to time” require compliance with the most recent version of the referenced document. |\n| Compliance: | 1. Unless previously accomplished, within 6 months after the commencement date of this AD and thereafter at intervals not to exceed 100 hours’ time in service. |\n| | This AD commences on 17 September 2020. |\n| Background: | An audit of the Australian Aircraft Register found that Swift Museum Foundation GC-1B aircraft have been on the register for some time and that requirements equivalent to the applicable FAA ADs have not previously been mandated in Australia for these aircraft. |\n| | This AD is issued to mandate requirements equivalent to FAA AD 47-06-01. |\n\n![A drawing of a face\nDescription automatically generated](image.001.jpeg)\n\nPieter van Dijk \nDelegate of the Civil Aviation Safety Authority\n\n25 August 2020","sortOrder":0},{"sectionNumber":"AD/GC-1/2","sectionType":"part","heading":"AD/GC-1/2","content":"## AD/GC-1/2","sortOrder":1},{"sectionNumber":"Main Landing Gear RetractionSystem - Ins","sectionType":"part","heading":"Main Landing Gear RetractionSystem - Inspection","content":"## Main Landing Gear Retraction \nSystem - Inspection","sortOrder":2},{"sectionNumber":"18/2020","sectionType":"part","heading":"18/2020","content":"## 18/2020","sortOrder":3}],"analysis":{"flash_summary_failed":{"failed":true,"reason":"A positive credit balance is required for all requests, including BYOK, so fallback providers remain available. Add credits at https://vercel.com/d?to=%2F%5Bteam%5D%2F%7E%2Fai%3Fmodal%3Dtop-up to continue.","source":"analysis-cron"},"kimi_summary":{"content_quality":"ok","complexity_score":4,"scope_assessment":{"changed":false,"description":"This is a standalone Airworthiness Directive with a narrow, specific purpose: mandating inspection requirements for one aircraft type's landing gear system. It has not expanded beyond its original safety intent."},"complexity_factors":["Four distinct mechanical measurements with precise tolerances (1/8 to 1/4 inch, 0.001 to 0.005 inch, 1/32 inch, and functional positioning requirements)","Technical terminology requiring aviation maintenance knowledge ('dead centre', 'down stop', 'limit switch plunger', 'turnbuckle', 'time in service')","Incorporation by reference to an external document (FAA AD 47-06-01 and Globe Customer Service Maintenance Bulletin No. 7) with 'as in force from time to time' clause creating ongoing compliance obligations","Nested conditional logic: the turnbuckle requirement has two separate tests (down lock operation AND up limit switch clearance)","Dual compliance timeline (one-time initial inspection plus recurring 100-hour intervals)"],"plain_english_summary":"This AD requires owners/operators of Swift Museum Foundation GC-1A and GC-1B aircraft to inspect and adjust the main landing-gear retraction system so its mechanical linkages, down‑lock, emergency extension cable and limit switch operate and lock reliably. \n\nCompliance: initial inspection within six months of September 2020 and every 100 flight hours thereafter. It corrects an oversight by adopting an FAA safety requirement to prevent landing‑gear collapses on these vintage aircraft."},"flash_summary":{"complexity_score":6,"scope_assessment":{"changed":false,"description":"The AD adopts and mandates requirements equivalent to FAA AD 47‑06‑01 for Swift GC‑1A and GC‑1B aeroplanes to address a regulatory gap identified in the Australian register. It does not expand technical scope beyond the FAA AD; however, operational detail may shift over time because it requires compliance with the most recent Globe Customer Service Maintenance Bulletin No. 7."},"complexity_factors":["Technical precision: very small tolerances (0.001–0.005 in; 1/8–1/4 in; ~1/32 in) require calibrated gauges and skilled technicians.","Multiple interdependent checks: clearance, plunger coverage, switch depression, and emergency cable/turnbuckle sequencing must be verified together.","Recurring inspection burden: initial compliance within 6 months then at intervals not to exceed 100 flight hours increases ongoing maintenance workload and cost.","Cross‑reference to external document: reliance on Globe Customer Service Maintenance Bulletin No. 7 “as in force from time to time” creates a moving reference point for technical methods.","Applicability scope: applies to all GC‑1A and GC‑1B aircraft on the Australian register, concentrating costs on that owner/operator group.","Regulatory alignment: mandates requirements equivalent to FAA AD 47‑06‑01, so implementers must reconcile FAA text and local AD language when planning compliance."],"plain_english_summary":"This AD requires owners/operators of all Swift Museum Foundation GC‑1A and GC‑1B aeroplanes to inspect and, where necessary, adjust the main landing gear retraction system to specific mechanical tolerances (clearances, plunger extension, limit‑switch travel and emergency‑cable turnbuckle position). Compliance is required within 6 months and then every 100 flight hours. The stated purpose is to adopt FAA AD 47‑06‑01; aircraft owners pay inspection and adjustment costs and must use qualified maintenance personnel and precision measurements, following Globe Customer Service Maintenance Bulletin No. 7."}},"importantCases":[],"_links":{"self":"/api/acts/ad-gc-1-2-main-landing-gear-retraction-system-inspection","history":"/api/acts/ad-gc-1-2-main-landing-gear-retraction-system-inspection/history","analysis":"/api/acts/ad-gc-1-2-main-landing-gear-retraction-system-inspection/analysis","conflicts":"/api/acts/ad-gc-1-2-main-landing-gear-retraction-system-inspection/conflicts","importantCases":"/api/acts/ad-gc-1-2-main-landing-gear-retraction-system-inspection/important-cases","documents":"/api/acts/ad-gc-1-2-main-landing-gear-retraction-system-inspection/documents"}}