{"id":"F2006B06494","name":"AD/RAD/33 - Radio Magnetic Indicator - Modification","slug":"ad-rad-33-radio-magnetic-indicator-modification","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":48042,"registerId":"commonwealth-F2006B06494-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/RAD/33 - Radio Magnetic Indicator - Modification","content":"COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 \\- 107 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n![](image.001.png)  \nRadio Communication and Navigation Equipment\n\nAD/RAD/33 Radio Magnetic Indicator \\- Modification 6/76\n\nApplicability: Collins 332C-10 Radio Magnetic Indicators as listed:-\n\nP/N 622-0555-001 S/N 729 and below. P/N 622-0555-002 S/N 963 and below. P/N\n\n622-0555-003 S/N 3593 and below, 3595 thru 3600, 3602 thru 3611, 3613 thru 3628.\n\nP/N 622-0555-004 S/N 3693 and below, 3695 thru 3706. P/N 622-0555-005 S/N\n\n3252 and below. P/N 622-0555-006 S/N 4156 and below. P/N 622-0555-007 S/N\n\n3208 and below, 3210 thru 3231, 3233 thru 3239. P/N 622-0555-008 S/N 2805 and below.\n\nRequirement: 1. Install a placard on the glass face of each Collins 332C-10 indicator not already modified in accordance with Collins 332C-10 RMI SB No. 6, which reads \\- “USE ADF MODE ONLY”.\n\n2. Modify the 332C-10 indicator(s) in accordance with Collins 332C-10 RMI SB No. 6 dated Feb. 16, 1976 or later approved revision.\n\nWhen Para. 2 has been accomplished, compliance with Para. 1 is no longer required. Compliance: For Para. 1 \\- Within 100 hours time in service after 30 June 1976. For Para. 2 \\- Before\n\n1 March 1977.","sortOrder":0}],"analysis":{"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The directive applies narrowly to listed Collins 332C-10 units and prescribes either a temporary placard or a mandated modification by set dates. The text shows no indication of expanded scope beyond its stated corrective objective."},"complexity_factors":["Narrow applicability defined by multiple part numbers and serial-number ranges — requires checking individual unit serials against the list.","Two-step compliance path: temporary placard (Para.1) versus technical modification per external service bulletin (Para.2) with different deadlines.","Modification depends on an external technical document (Collins RMI SB No.6) — work must be done to that standard, likely by qualified maintenance organisations.","Timing calculations involve 'hours time in service' and fixed calendar deadlines, creating operational scheduling constraints.","Regulatory enforcement relies on the Civil Aviation Safety Authority regime; compliance verification and recording impose administrative burden."],"plain_english_summary":"Requires operators of specified Collins 332C-10 radio magnetic indicators (listed by part and serial numbers) either to fit a “USE ADF MODE ONLY” placard on the instrument face within 100 flight hours after 30 June 1976, or to modify the unit per Collins 332C-10 RMI Service Bulletin No. 6 by 1 March 1977. Aircraft operators bear the cost of placarding or modification; the regulator enforces compliance by the stated deadlines."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, targeted airworthiness directive addressing a specific instrument defect. It has not expanded beyond its original purpose of mandating safety modifications to Collins 332C-10 Radio Magnetic Indicators."},"complexity_factors":["Single, specific technical requirement with two alternative compliance paths","Limited applicability — only 8 specific part number ranges with serial number cutoffs","No defined terms section or cross-references to other legislation","Simple conditional logic: temporary fix required until permanent fix completed","Clear, fixed compliance dates (though historical)","Document is a standalone directive, not part of a larger legislative scheme in this excerpt"],"plain_english_summary":"This Airworthiness Directive from Australia's aviation safety regulator targets certain Collins 332C-10 radio magnetic indicators that can give incorrect directional information. It requires owners/operators to either fit a temporary \"USE ADF MODE ONLY\" warning within 100 flight hours after 30 June 1976 or complete the manufacturer’s permanent modification (Service Bulletin No. 6) by 1 March 1977; the label may be removed after the modification.\n\nIt affects aircraft with the listed Collins units and prevents potentially dangerous navigation errors."}},"importantCases":[],"_links":{"self":"/api/acts/ad-rad-33-radio-magnetic-indicator-modification","history":"/api/acts/ad-rad-33-radio-magnetic-indicator-modification/history","analysis":"/api/acts/ad-rad-33-radio-magnetic-indicator-modification/analysis","conflicts":"/api/acts/ad-rad-33-radio-magnetic-indicator-modification/conflicts","importantCases":"/api/acts/ad-rad-33-radio-magnetic-indicator-modification/important-cases","documents":"/api/acts/ad-rad-33-radio-magnetic-indicator-modification/documents"}}