{"id":"F2006B03776","name":"AD/BEECH 300/5 - Aft Cowling Access Door","slug":"ad-beech-300-5-aft-cowling-access-door","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":43372,"registerId":"commonwealth-F2006B03776-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/BEECH 300/5 - Aft Cowling Access Door","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)  Beechcraft 300 Series Aeroplanes\n\n \n\nAD/BEECH 300/5 Aft Cowling Access Door 5/93\n\nApplicability: Model 300 with serial numbers FA-2 through FA-211, and FF-1 through FF-19. Requirement:               Action in accordance with the technical requirements of FAA AD 93-01-20 Amdt 39-\n\n8474.\n\n \n\nNote: Beech SB 2329 refers.\n\n \n\nCompliance: Unless already accomplished in accordance with FAA AD 89-22-12; as specified in the Requirement Document.\n\n \n\nBackground: The FAA had received several reports of upper aft cowling access doors that opened in flight and separated from the aircraft. The Requirement Document introduces as a compliance option, a cowling door latch replacement kit that provides a level of safety equivalent to the cowling door retention modification required by AD\n\n89-22-12.\n\n \n","sortOrder":0}],"analysis":{"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":true,"description":"The directive introduces an alternative means of compliance: the Requirement Document adds a cowling door latch replacement kit as an option that the document states provides an equivalent level of safety to the earlier cowling door retention modification required by FAA AD 89-22-12. This expands the compliance routes available to operators from the earlier sole requirement to complete the retention modification. (Background; Compliance)"},"complexity_factors":["Requirement references external FAA AD (FAA AD 93-01-20 Amdt 39-8474) for the technical steps rather than containing the technical detail itself (Requirement)","Applicability limited to specific serial numbers (FA-2 through FA-211, and FF-1 through FF-19) requiring operators to check serials (Applicability)","Conditional compliance clause: 'Unless already accomplished in accordance with FAA AD 89-22-12' creates a one-way conditional exemption path (Compliance)","Cross-references to additional technical material (Beech SB 2329) that operators must consult (Note)","Introduction of an alternative compliance option (latch replacement kit) that must be evaluated against prior mandated modification for equivalence (Background)"],"plain_english_summary":"This directive requires owners/operators of specified Beechcraft Model 300 aeroplanes (serials FA‑2 to FA‑211 and FF‑1 to FF‑19) to comply with FAA AD 93‑01‑20 (or rely on prior compliance with FAA AD 89‑22‑12). It aims to prevent upper aft cowling access doors opening and separating in flight, and permits a latch‑replacement kit as an alternative compliance method. Operators bear the cost and must follow the referenced FAA technical instructions."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, single-issue airworthiness directive addressing a specific mechanical defect in specific aircraft. It has not expanded beyond its original purpose of mandating a cowling door fix."},"complexity_factors":["Very short document (under 200 words)","Only 2 defined applicability criteria (specific serial number ranges)","Single technical requirement referencing an external FAA document","One compliance exemption (prior completion under FAA AD 89-22-12)","No nested conditions, subsections, or cross-references within the instrument itself"],"plain_english_summary":"This is an **Airworthiness Directive (AD)** — essentially a mandatory safety order issued by Australia's Civil Aviation Safety Authority (CASA) for specific aircraft.\n\n**What it does:**\nOrders owners and operators of certain **Beechcraft 300 series aeroplanes** to fix a dangerous design flaw with the **aft (rear) cowling access door** — the panel at the back of the engine cover.\n\n**The problem:**\nThe US Federal Aviation Administration (FAA) received multiple reports of these doors **opening mid-flight and falling off the aircraft**. A door flying off at altitude creates serious safety risks — it could damage the aircraft, hit another plane, or injure people on the ground.\n\n**Who must comply:**\nOwners of Beechcraft Model 300 aircraft with serial numbers **FA-2 through FA-211** and **FF-1 through FF-19**.\n\n**What they must do:**\nFollow the technical instructions in **FAA AD 93-01-20** (a US safety order). This includes either:\n- Installing a **new latch kit** that keeps the door secure, OR\n- Proving they already made a similar fix under an earlier order (FAA AD 89-22-12)\n\n**Why it matters:**\nThis prevents engine cowling doors from becoming airborne hazards. Aircraft cannot legally fly in Australia unless they comply with this directive."}},"importantCases":[],"_links":{"self":"/api/acts/ad-beech-300-5-aft-cowling-access-door","history":"/api/acts/ad-beech-300-5-aft-cowling-access-door/history","analysis":"/api/acts/ad-beech-300-5-aft-cowling-access-door/analysis","conflicts":"/api/acts/ad-beech-300-5-aft-cowling-access-door/conflicts","importantCases":"/api/acts/ad-beech-300-5-aft-cowling-access-door/important-cases","documents":"/api/acts/ad-beech-300-5-aft-cowling-access-door/documents"}}