{"id":"F2006B08171","name":"AD/CESSNA 310/43 Amdt 1 - Wing Tip Strobe Light - Inspection","slug":"ad-cessna-310-43-amdt-1-wing-tip-strobe-light-inspection","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":115359,"registerId":"commonwealth-F2006B08171-current","compilationNumber":null,"startDate":"2026-04-03","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/CESSNA 310/43 Amdt 1 - Wing Tip Strobe Light - Inspection","content":"COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 \\- 105 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n![](image.001.png)  \nCessna 310 Series Aeroplanes\n\nAD/CESSNA 310/43\n\nAmdt 1\n\n  \nWing Tip Strobe Light \\- Inspection 7/79\n\nApplicability: All models S/Nos. 310Q0001 thru 310R0250, 0252 thru 0254, 0256, 0259, 0262 and 0263 equipped with strobe lights installed in wing tip fuel tank nose cap except those aeroplanes having Symbolic displays P/N 30-0005, 30-0199-3 and 701133-1; Whelen Engineering Co. Inc. P/N A430; and Grimes Manufacturing Co. P/N 30-0515-5, 30- 1172-1, 30-0531-1 and 30-0467-5, strobe lights.\n\nRequirement: 1. Deactivate the strobe light system by installing a guard over the switch and/or by pulling and locking the circuit breaker so that it cannot be inadvertently reset, or by other suitable means.\n\n    2. Systems having Grimes P/N 30-0515-1 strobe lights may be reactivated upon the installation of Grimes P/N 31-1723-5 or 30-1171-1 cover plates in accordance with Cessna SL ME75-16. These cover plates may be identified by the presence of two quench tubes protruding into the light assembly from the end plates.\n\n    3. Do not reactivate other non excepted strobe light assemblies until data, showing that the strobe lights are explosion proof, has been submitted to and approved by the Secretary.\n\nCompliance: Within 100 hours time in service after 30 July 1976.","sortOrder":0}],"analysis":{"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":true,"description":"This document is labeled an amendment (Amdt 1) and therefore modifies the earlier AD. It imposes mandatory deactivation of specified wing‑tip strobe lights, allows limited reactivation for specified Grimes assemblies after installing designated cover plates per Cessna SL ME75‑16 (identifiable by two quench tubes), and requires Secretary approval of submitted evidence of explosion‑proofing before any other reactivation. It sets a compliance window of 100 hours time in service after 30 July 1976."},"complexity_factors":["Narrow serial‑number applicability requires operators to check serial lists to determine applicability (Applicability).","Multiple specific part‑number exceptions create identification and recordkeeping burdens for maintenance staff (Applicability).","Alternative deactivation methods (guard, locked breaker, or “other suitable means”) leave room for differing technical solutions and compliance judgement (Requirement 1).","Limited reactivation path for certain Grimes assemblies depends on installation per an external service letter and visual identification (two quench tubes), adding a technical compliance step (Requirement 2; Cessna SL ME75‑16).","Reactivation of other strobe assemblies requires submission and approval of technical data showing explosion‑proofing, creating regulatory discretion and potential administrative delay (Requirement 3).","Compliance deadline is expressed in flight hours relative to a calendar date, imposing operational scheduling and tracking (Compliance)."],"plain_english_summary":"This airworthiness directive requires operators of specified Cessna 310 serial numbers with strobe lights in the wing‑tip fuel‑tank nose cap to deactivate those strobes (by guard, locked circuit breaker or similar). Certain Grimes assemblies may be reactivated after fitting specified cover plates per Cessna SL ME75‑16; all other non‑excepted strobes must remain deactivated until evidence they are explosion‑proof is submitted and approved by the Secretary. Claimed purpose: to ensure strobes are explosion‑proof. Costs fall on owners/operators (modification, maintenance or data submission) and final approval is at the Secretary’s discretion."},"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":3,"scope_assessment":{"changed":false,"description":"This is a narrow, targeted airworthiness directive focused on a specific safety defect in specific aircraft models. It has not expanded beyond its original purpose of addressing the explosion risk from wing tip strobe lights in Cessna 310 aircraft. The amendment (Amdt 1) appears to update the original directive but maintains the same scope."},"complexity_factors":["Multiple exception categories: three manufacturers' part numbers exempted from the directive entirely","Nested conditional logic: one specific part number (Grimes P/N 30-0515-1) has an alternative compliance path requiring specific replacement parts","Technical aviation terminology requiring specialized knowledge (part numbers, serial number ranges, 'quench tubes', 'time in service')","Cross-reference to external document (Cessna Service Letter SL ME75-16) for approved repair method","Dual compliance methods for deactivation with 'or' conditions (switch guard OR circuit breaker OR other suitable means)","Regulatory reference to 'the Secretary' without defining which Secretary (assumed knowledge of aviation administrative structure)"],"plain_english_summary":"Owners/operators of certain Cessna 310Q and 310R aircraft must immediately disable wing‑tip strobe lights mounted in the nose caps of wing tip fuel tanks because the original design can ignite fuel vapours and risk explosion. Affected aircraft must keep strobes deactivated unless fitted with specified approved replacement parts (or can prove lights are explosion‑proof and receive written approval). This mandatory CASA directive prevents a serious fuel‑vapour ignition hazard."}},"importantCases":[],"_links":{"self":"/api/acts/ad-cessna-310-43-amdt-1-wing-tip-strobe-light-inspection","history":"/api/acts/ad-cessna-310-43-amdt-1-wing-tip-strobe-light-inspection/history","analysis":"/api/acts/ad-cessna-310-43-amdt-1-wing-tip-strobe-light-inspection/analysis","conflicts":"/api/acts/ad-cessna-310-43-amdt-1-wing-tip-strobe-light-inspection/conflicts","importantCases":"/api/acts/ad-cessna-310-43-amdt-1-wing-tip-strobe-light-inspection/important-cases","documents":"/api/acts/ad-cessna-310-43-amdt-1-wing-tip-strobe-light-inspection/documents"}}