{"id":"F2006B08211","name":"AD/CESSNA 320/31 - Auxiliary Fuel Pump Wiring Modification","slug":"ad-cessna-320-31-auxiliary-fuel-pump-wiring-modification","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":115437,"registerId":"commonwealth-F2006B08211-current","compilationNumber":null,"startDate":"2026-04-03","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/CESSNA 320/31 - Auxiliary Fuel Pump Wiring Modification","content":"---\nmeta-content-style-type: text/css\nmeta-content-type: application/xhtml+xml; charset=utf-8\nmeta-generator: Aspose.Words for .NET 22.10.0\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)  Cessna 320 Series Aeroplanes\n\n \n\nAD/CESSNA 320/31 Auxiliary Fuel Pump Wiring Modification 12/89\n\nApplicability: All models 320 which have been modified in accordance with Cessna Service Bulletin MEB 88-3.\n\n \n\nRequirement: Unless already accomplished, action in accordance with Cessna Service Bulletin MEB 88-3 Revision 1.\n\nNote: This Requirement does not apply to aeroplanes that have not incorporated SB MEB 88-3.\n\nCompliance: Prior to the issue of the next Maintenance Release after 31 December 1989.\n\n \n\nBackground: Compliance with the original issue of SB MEB88-3 was not considered to warrant the issue of an Airworthiness Directive. This AD is raised to ensure that necessary features of Revision 1 are incorporated into modified aeroplanes.\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\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n","sortOrder":0}],"analysis":{"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":true,"description":"The AD transforms features introduced in Revision 1 of SB MEB 88-3 into mandatory requirements for aircraft that had earlier incorporated the original SB, whereas the original SB’s first issue did not trigger an AD. (Background; Requirement; Applicability)"},"complexity_factors":["Narrow applicability: applies only to Model 320 aeroplanes already modified per SB MEB 88-3 (Applicability).","Mandatory incorporation of an external document's Revision 1 rather than standalone regulatory text (Requirement).","Compliance timing tied to the operator's next Maintenance Release after a specific date, creating coordination needs (Compliance).","Explicit exclusion for aeroplanes that have not incorporated the original SB, requiring verification of modification status (Note).","Reliance on the content and interpretation of Cessna Service Bulletin MEB 88-3 Revision 1 increases operational and interpretive dependency on the manufacturer document (Requirement/Background)."],"plain_english_summary":"This Airworthiness Directive requires Cessna 320 aeroplanes that were previously modified under Cessna Service Bulletin MEB 88‑3 to incorporate the wiring changes in Revision 1 of that bulletin. It applies only to Model 320 aeroplanes that have already incorporated the original SB and must be done before the next Maintenance Release issued after 31 December 1989. The Civil Aviation Safety Authority mandates compliance, and operators must fund and schedule the retrofit work to meet the deadline."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, time-bound safety directive with a narrow, specific scope (auxiliary fuel pump wiring on modified Cessna 320s). It has not expanded beyond its original purpose."},"complexity_factors":["Very short document (under 200 words)","Only 1 defined applicability condition (aircraft modified per SB MEB 88-3)","Single requirement with clear cross-reference to external document (Cessna Service Bulletin)","Simple compliance deadline structure","No nested exceptions or conditional logic — only one straightforward exclusion (aircraft without the SB modification)","No internal definitions section"],"plain_english_summary":"**What this is:** This is an Airworthiness Directive (AD) — a mandatory safety order issued by Australia's Civil Aviation Safety Authority (CASA) for specific Cessna 320 aircraft.\n\n**What it does:** It requires owners/operators of Cessna 320 aeroplanes to update the wiring for their auxiliary fuel pumps. Specifically, if the aircraft was previously modified according to an older Cessna Service Bulletin (MEB 88-3), it must now be updated to meet the revised standard (Revision 1 of that same bulletin).\n\n**Who it affects:** Owners and operators of all Cessna 320 model aircraft that have had the MEB 88-3 modification done to them. If your aircraft never had that modification, this directive doesn't apply to you.\n\n**Why it matters:** The original modification (SB MEB 88-3) wasn't considered serious enough to require a mandatory directive. However, the updated version (Revision 1) contains important safety improvements that CASA now considers essential. The directive ensures these safety fixes are implemented to prevent potential fuel pump wiring issues that could affect flight safety.\n\n**Deadline:** The work had to be completed before the next Maintenance Release (a formal document certifying an aircraft is airworthy) issued after 31 December 1989."}},"importantCases":[],"_links":{"self":"/api/acts/ad-cessna-320-31-auxiliary-fuel-pump-wiring-modification","history":"/api/acts/ad-cessna-320-31-auxiliary-fuel-pump-wiring-modification/history","analysis":"/api/acts/ad-cessna-320-31-auxiliary-fuel-pump-wiring-modification/analysis","conflicts":"/api/acts/ad-cessna-320-31-auxiliary-fuel-pump-wiring-modification/conflicts","importantCases":"/api/acts/ad-cessna-320-31-auxiliary-fuel-pump-wiring-modification/important-cases","documents":"/api/acts/ad-cessna-320-31-auxiliary-fuel-pump-wiring-modification/documents"}}