{"id":"F2006B08257","name":"AD/CESSNA 340/11 Amdt 1 - Wing Tip Strobe Light - Inspection","slug":"ad-cessna-340-11-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":115561,"registerId":"commonwealth-F2006B08257-current","compilationNumber":null,"startDate":"2026-04-03","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/CESSNA 340/11 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 340 Series Aeroplanes\n\nAD/CESSNA 340/11\n\nAmdt 1\n\n  \nWing Tip Strobe Light \\- Inspection 7/79\n\nApplicability: All models S/Nos. 340-0001 thru 340-0551 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 any 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 plate.\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":4,"scope_assessment":{"changed":true,"description":"This amendment narrows and clarifies the original deactivation requirement by specifying exempt strobe part numbers in the Applicability and by creating a conditional reactivation route for Grimes P/N 30-0515-1 upon installation of Grimes P/N 31-1723-5 or 30-1171-1 cover plates per Cessna SL ME75-16 (Requirement 2). All other non-exempt strobe assemblies must remain deactivated until the Secretary approves data demonstrating they are explosion‑proof (Requirement 3), shifting some scope from blanket deactivation to a parts‑specific and approval‑dependent regime."},"complexity_factors":["Technical specificity of applicability by serial number range and multiple manufacturer part numbers (Applicability).","Multiple acceptable deactivation methods (guard, locked circuit breaker, or equivalent) create operational discretion (Requirement 1).","Conditional reactivation pathway for one Grimes part number dependent on installation per a Cessna service letter (Requirement 2 and Cessna SL ME75-16).","Requirement that other non-exempt units remain deactivated until the Secretary approves data that they are 'explosion proof' creates a regulatory approval gate and administrative burden (Requirement 3).","Identification detail (cover plates identified by two quench tubes) requires physical inspection skills and parts knowledge (Requirement 2).","Compliance deadline tied to a past date (100 hours TIS after 30 July 1976) can create retroactive record-check and scheduling burdens (Compliance)."],"plain_english_summary":"This airworthiness directive requires owners/operators of Cessna 340 aeroplanes (S/N 340-0001 to 340-0551) with strobe lights in the wing‑tip fuel tank nose cap to deactivate those strobe lights by fitting a switch guard, pulling and locking the circuit breaker, or an equivalent method, within 100 hours time‑in‑service after 30 July 1976. Certain strobe units listed in the applicability are exempt; Grimes P/N 30-0515-1 may be reactivated only after installation of specified cover plates per Cessna SL ME75-16. Other non-exempt units remain deactivated until the Secretary approves data showing they are explosion‑proof."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a narrow, targeted safety directive addressing a specific mechanical defect in a specific aircraft model. It has not expanded beyond its original purpose of addressing the explosion risk from wing tip strobe lights on early Cessna 340 aircraft."},"complexity_factors":["Very short document (approximately 200 words)","Only 3 main requirements with clear sequential numbering","Limited conditional logic (one exception path for specific part numbers)","No cross-references to other legislation or regulations beyond the enabling authority (Civil Aviation Regulations 1998, Part 39)","Straightforward applicability section using serial number ranges and specific part number exclusions","Single compliance deadline with simple calculation method (100 hours time in service after fixed date)"],"plain_english_summary":"This Airworthiness Directive requires owners/operators of Cessna 340 aircraft (S/N 0001–0551) to disable wing-tip strobe lights installed in the wing-tip fuel tank nose caps because of an explosion risk from electrical sparks. Certain approved strobe part numbers are exempt.\n\nOne Grimes strobe may be reinstated with specific cover plates; all other affected strobes must remain disabled until the manufacturer proves them explosion‑proof and the Secretary approves. Compliance within 100 flight hours after 30 July 1976."}},"importantCases":[],"_links":{"self":"/api/acts/ad-cessna-340-11-amdt-1-wing-tip-strobe-light-inspection","history":"/api/acts/ad-cessna-340-11-amdt-1-wing-tip-strobe-light-inspection/history","analysis":"/api/acts/ad-cessna-340-11-amdt-1-wing-tip-strobe-light-inspection/analysis","conflicts":"/api/acts/ad-cessna-340-11-amdt-1-wing-tip-strobe-light-inspection/conflicts","importantCases":"/api/acts/ad-cessna-340-11-amdt-1-wing-tip-strobe-light-inspection/important-cases","documents":"/api/acts/ad-cessna-340-11-amdt-1-wing-tip-strobe-light-inspection/documents"}}