{"id":"F2006L01063","name":"AD/CONVAIR/19 - NLG Actuating Cylinder Rod End Eyebolt","slug":"ad-convair-19-nlg-actuating-cylinder-rod-end-eyebolt","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":58370,"registerId":"commonwealth-F2006L01063-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Kelowna Flightcraft (General Dynamics/Co","sectionType":"division","heading":"Kelowna Flightcraft (General Dynamics/Convair) Series Aeroplanes","content":"### Kelowna Flightcraft (General Dynamics/Convair) Series Aeroplanes\n\n| AD/CONVAIR/19 | NLG Actuating Cylinder Rod End Eyebolt | 5/2006 |\n| ------------- | -------------------------------------- | ------ |\n\n| Applicability: | Model 340 and 440 aircraft, and all such model aircraft converted to turbopropeller power.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 |\n| -------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |\n| Requirement:   | 1. If the nose landing gear actuating cylinder rod end eyebolt, Peacock part number C50137-2, has not been modified in accordance with Convair Service Engineering Report No. 6820-240-23/340-45/440-45, dated 24 August 1962; inspect the unmodified eyebolt, where the threaded area is machined for the relief radius, by a dye penetrant method.2. If the nose landing gear actuating cylinder rod end eyebolt, Peacock part number C50137-2, has been modified in accordance with Convair Service Engineering Report No. 6820-240-23/340-45/440-45, dated 24 August 1962; inspect the eyebolt, where the threaded area is machined for the relief radius, by a dye penetrant method.If cracking of an eyebolt is detected during any inspection, before further flight, replace with a serviceable eyebolt of the same part number; and continue the repetitive inspections.If unmodified eyebolts are used as replacement bolts, the Requirement 1 inspection periods are applicable.Note: FAA AD 63-15-04 Amdt 584 Part 507 refers. |\n| Compliance:    | 1. Unless the initial inspection is already accomplished; within 225 hours time in service after 11 May 2006, unless accomplished within the last 775 hours time in service. Inspect thereafter at intervals not to exceed 1,000 hours time in service.2. Unless the initial inspection is already accomplished; within 1,000 hours time in service after 11 May 2006, unless accomplished within the last 4,500 hours time in service. Inspect thereafter at intervals not to exceed 5,500 hours time in service.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         |\n|                | This Airworthiness Directive becomes effective on 11 May 2006.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             |\n\n| Background: | The FAA received reports of cracks in certain nose landing gear actuating cylinder rod end eyebolts. |\n| ----------- | ---------------------------------------------------------------------------------------------------- |\n\n![](image.001.png)  \nDavid Villiers  \nDelegate of the Civil Aviation Safety Authority\n\n31 March 2006","sortOrder":0},{"sectionNumber":"AD/CONVAIR/19","sectionType":"part","heading":"AD/CONVAIR/19","content":"## AD/CONVAIR/19","sortOrder":1},{"sectionNumber":"NLG Actuating Cylinder Rod End Eyebolt","sectionType":"part","heading":"NLG Actuating Cylinder Rod End Eyebolt","content":"## NLG Actuating Cylinder Rod End Eyebolt","sortOrder":2},{"sectionNumber":"5/2006","sectionType":"part","heading":"5/2006","content":"## 5/2006","sortOrder":3}],"analysis":{"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"Scope aligns with the original safety focus: inspecting and replacing a specific eyebolt on Convair 340/440 types. The instrument does not expand affected aircraft types or parts beyond Peacock P/N C50137-2 and differentiates only by whether the 1962 Convair modification was applied (Applicability; Requirement). It references the FAA/Convair documents but does not broaden remedies or add new obligations beyond inspection, replacement, and specified intervals (Requirement; Compliance)."},"complexity_factors":["Narrow applicability to Convair Model 340 and 440 and their turboprop conversions (Applicability)","Two inspection tracks depending on whether a 1962 Convair modification was applied, producing different initial deadlines and recurring intervals (Requirement; Compliance)","Technical inspection method mandated (dye penetrant) and a positive replacement mandate before further flight if cracking is detected (Requirement)","Multiple specific time-in-service thresholds to monitor (225 / 775 / 1,000 / 4,500 / 5,500 hours) creating administrative tracking burden for operators (Compliance)","References to external historical documents (Convair Service Engineering Report No. 6820-240-23/340-45/440-45 and FAA AD 63-15-04) mean operators may need to verify modification status and parts history (Requirement; Note)","Low regulator discretion — obligations are mandatory and prescriptive rather than discretionary (Requirement; Compliance)","Clear identification of the affected part by Peacock part number C50137-2 reduces ambiguity about scope but concentrates operational impact on owners/operators of affected aircraft (Applicability; Requirement)"],"plain_english_summary":"Requires operators of Convair Model 340 and 440 aeroplanes (including turboprop conversions) to inspect the nose-landing-gear actuating-cylinder rod-end eyebolt (Peacock P/N C50137-2) using dye-penetrant testing, replace any cracked eyebolts before further flight, and carry out repetitive inspections at hour-based intervals that differ depending on whether a 1962 Convair modification was applied. The directive sets specific initial deadlines and recurring time-in-service limits and is enforced by the Civil Aviation Safety Authority. Operators bear inspection and replacement costs and must track hours-in-service."},"kimi_summary":{"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"This is a standard, targeted Airworthiness Directive addressing a specific safety defect in a specific aircraft part. The scope remains tightly focused on the nose landing gear eyebolt issue as originally identified."},"complexity_factors":["Multiple conditional pathways based on modification status (modified vs unmodified bolts)","Nested time calculations for compliance (initial inspection windows plus ongoing intervals)","Cross-reference to external technical document (Convair Service Engineering Report No. 6820-240-23/340-45/440-45)","Cross-reference to US FAA Airworthiness Directive (AD 63-15-04)","Specific part numbering and manufacturer identification required for applicability","Repetitive inspection requirement with replacement contingency"],"plain_english_summary":"This CASA Airworthiness Directive requires owners/operators of Convair 340/440 (including turboprop conversions) to inspect the Peacock C50137‑2 actuating cylinder rod-end eyebolt on the nose landing gear because the FAA found cracking that could cause gear collapse. Unmodified and modified bolts have different inspection intervals (shorter for unmodified); any cracked bolt must be replaced before further flight. This is a mandatory safety action to prevent landing/taxiing failures."},"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"}},"importantCases":[],"_links":{"self":"/api/acts/ad-convair-19-nlg-actuating-cylinder-rod-end-eyebolt","history":"/api/acts/ad-convair-19-nlg-actuating-cylinder-rod-end-eyebolt/history","analysis":"/api/acts/ad-convair-19-nlg-actuating-cylinder-rod-end-eyebolt/analysis","conflicts":"/api/acts/ad-convair-19-nlg-actuating-cylinder-rod-end-eyebolt/conflicts","importantCases":"/api/acts/ad-convair-19-nlg-actuating-cylinder-rod-end-eyebolt/important-cases","documents":"/api/acts/ad-convair-19-nlg-actuating-cylinder-rod-end-eyebolt/documents"}}