{"id":"F2006B02121","name":"AD/AC/62 - Forward and Aft Inboard Wing Spar Cap Rivets - Inspection and Replacement","slug":"ad-ac-62-forward-and-aft-inboard-wing-spar-cap-rivets-inspection-and-replacement","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":41351,"registerId":"commonwealth-F2006B02121-current","compilationNumber":null,"startDate":"2026-04-01","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/AC/62 - Forward and Aft Inboard Wing Spar Cap Rivets - Inspection and Replacement","content":"---\nmeta-content-style-type: text/css\nmeta-content-type: application/xhtml+xml; charset=utf-8\nmeta-description: CASA Airworthiness Directive\nmeta-generator: Aspose.Words for .NET 22.10.0\nmeta-keywords: Issue 4/1977,Aircraft below 5700 kg,Twin Commander (Gulfstream/Rockwell/ Aerocommander 500, 600 and 700) Series Aeroplanes,Forward and Aft Inboard Wing Spar Cap Rivets - Inspection and Replacement,62\ntitle: Airworthiness Directive - AD/AC/62 - Forward and Aft Inboard Wing Spar Cap Rivets - Inspection and Replacement\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)  Twin Commander (Gulfstream/Rockwell/ Aerocommander 500, 600 and 700) Series Aeroplanes\n\n \n\nAD/AC/62 Forward and Aft Inboard Wing Spar Cap\n\nRivets - Inspection and Replacement\n\n\n4/77\n\n \n\nApplicability: All models 690, 690A and 690B with S/Nos. 11000 to 11366, 11368, 11369, 11370\n\nand 11371.\n\n \n\nDocument: 1. Rockwell International SB No. 163; or 2. FAA AD 77-03-01 Amend 39-2823.\n\nCompliance: 1. Initially inspect before further flight, unless accomplished in the preceding 25 hours time in service, and thereafter at intervals not exceeding 25 hours time in service until replaced.\n\n \n\n2. Replace rivets not later than next major inspection after 30 April 1977.\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 narrow, targeted safety directive addressing a specific structural defect in specific aircraft. It has not expanded beyond its original purpose of ensuring wing spar integrity in affected Twin Commander aircraft."},"complexity_factors":["Very short document (approximately 150 words of substantive content)","Only 3 defined applicability criteria (specific aircraft models and serial numbers)","Simple two-step compliance structure (inspect, then replace)","No cross-references to other legislation beyond two external technical documents","No nested exceptions or conditional logic","Single purpose: one specific mechanical defect on one aircraft type"],"plain_english_summary":"This CASA Airworthiness Directive mandates urgent inspection and replacement of forward and aft inboard wing spar cap rivets on specified Twin Commander 690/690A/690B aircraft (serials 11000–11366, 11368–11371). Owners/operators must inspect before next flight (or within 25 flight hours if recently checked), repeat every 25 hours until rivets are replaced, and complete replacement by the next major inspection after 30 April 1977.\n\nThe AD addresses a manufacturer/FAA-identified defect that could cause catastrophic wing failure."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The directive applies as written to the specified Twin Commander 690-series serial numbers and models. The text shows no alteration or expansion of applicability or requirements within this document; compliance mechanics are immediate inspection, recurring 25-hour checks, and replacement by the next major inspection after 30 April 1977."},"complexity_factors":["Narrow applicability to specific models and serial numbers (Applicability).","Immediate pre-flight inspection mandate with short repeat interval (every 25 hours) until replacement (Compliance: 1).","Replacement deadline tied to the next major inspection after a fixed date (30 April 1977) rather than a fixed flight-hour count (Compliance: 2).","Dependence on external technical documents for procedures (Rockwell SB No.163; FAA AD 77-03-01).","Operational impacts: scheduling downtime, locating replacement rivets/parts, and labour for inspections and replacements.","Recordkeeping and tracking of time-in-service to meet the 25-hour inspection trigger and replacement timing."],"plain_english_summary":"**What it does:** Requires immediate and recurring inspections of the forward and aft inboard wing spar cap rivets on specific Twin Commander 690-series aeroplanes, and mandates replacement of affected rivets by the next major inspection after 30 April 1977.  \n\n**Who it affects and why it matters:** Operators of the listed serial-numbered aircraft must perform inspections before further flight (unless done within the previous 25 hours) and every 25 hours until replacement, following Rockwell SB No.163 or FAA AD 77-03-01 (Compliance: 1–2). Operators pay for inspections, parts and downtime."}},"importantCases":[],"_links":{"self":"/api/acts/ad-ac-62-forward-and-aft-inboard-wing-spar-cap-rivets-inspection-and-replacement","history":"/api/acts/ad-ac-62-forward-and-aft-inboard-wing-spar-cap-rivets-inspection-and-replacement/history","analysis":"/api/acts/ad-ac-62-forward-and-aft-inboard-wing-spar-cap-rivets-inspection-and-replacement/analysis","conflicts":"/api/acts/ad-ac-62-forward-and-aft-inboard-wing-spar-cap-rivets-inspection-and-replacement/conflicts","importantCases":"/api/acts/ad-ac-62-forward-and-aft-inboard-wing-spar-cap-rivets-inspection-and-replacement/important-cases","documents":"/api/acts/ad-ac-62-forward-and-aft-inboard-wing-spar-cap-rivets-inspection-and-replacement/documents"}}