{"id":"F2006B04315","name":"AD/BEECH 99/5 - MLG Drag Leg Lock Link Roll Pin","slug":"ad-beech-99-5-mlg-drag-leg-lock-link-roll-pin","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":44130,"registerId":"commonwealth-F2006B04315-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/BEECH 99/5 - MLG Drag Leg Lock Link Roll Pin","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)  \nBeechcraft 99 Series Aeroplanes\n\nAD/BEECH 99/5 MLG Drag Leg Lock Link Roll Pin 6/96\n\nApplicability: Models 99, 99A, A99A, B99, and C99, with serial numbers U-1 through U-239.\n\nRequirement: Inspect the main landing gear drag leg lock link to ensure that the hole for the roll pin is drilled completely through both walls of the link, in accordance with the Accomplishment Instructions section of Beech Service Bulletin 2607, Revision 1.\n\nReplace any drag leg lock link that does not have the roll pin hole drilled through both walls of the link. Accomplish this replacement in accordance with the maintenance manual.\n\nNote: FAA AD 96-03-13 Amdt 39-9510 refers.\n\nCompliance: Within 100 hours’ time in service after 23 May 1996.\n\nBackground: The FAA received a report of an incident in which a main landing gear collapse had occurred. An investigation revealed that the roll pin hole was not completely drilled through both walls of the drag leg lock link.","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This Airworthiness Directive maintains its original narrow scope — addressing a specific manufacturing defect in a specific aircraft component. There is no evidence of scope creep; it remains targeted at the precise safety issue identified (incomplete drilling of roll pin holes in main landing gear drag leg lock links)."},"complexity_factors":["Single, specific mechanical inspection requirement","Only one defined applicability criterion (specific models and serial numbers)","Clear cross-reference to external technical document (Beech Service Bulletin 2607)","Simple binary compliance outcome (inspect and replace if defective)","Straightforward time-based compliance deadline (100 hours time in service)","No nested exceptions, conditional logic, or alternative compliance methods","Short document (approximately 150 words of substantive content)"],"plain_english_summary":"This is an **Airworthiness Directive** (a mandatory safety order) issued by Australia's Civil Aviation Safety Authority for specific Beechcraft aeroplanes.\n\n**What it does:**\nOrders owners and operators of certain Beechcraft 99 series planes to inspect a specific part of the main landing gear — the \"drag leg lock link\" — to check whether a small hole (for a roll pin) was drilled all the way through both sides of the metal component.\n\n**Who it affects:**\nOwners and operators of Beechcraft models 99, 99A, A99A, B99, and C99 with serial numbers U-1 through U-239.\n\n**What must be done:**\n- **Inspect** the landing gear part following the instructions in Beech Service Bulletin 2607, Revision 1\n- **Replace** any link where the hole wasn't drilled through both walls, following the maintenance manual\n- **Complete this work** within 100 hours of flying time after 23 May 1996\n\n**Why it matters:**\nThe FAA (American aviation regulator) reported a case where a plane's main landing gear collapsed because this hole wasn't drilled properly. This directive prevents similar accidents by ensuring the roll pin can be installed correctly to secure the landing gear.\n\n**Key point:** This is a **mandatory safety fix** — compliance is not optional for affected aircraft."},"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"The directive implements a targeted inspection and replacement requirement addressing a specific manufacturing/assembly defect reported by the FAA. The document's scope is limited to the specified models and serial numbers and to the single corrective action described; nothing in the text indicates an expansion or narrowing of that original corrective scope."},"complexity_factors":["Narrow applicability limited to five aircraft models and serial numbers U-1 through U-239 (Applicability)","Single, concrete inspection requirement with a clear compliance window (Requirement; Compliance)","Replacement action specified with a reference to the maintenance manual—requires standard maintenance capability (Requirement)","Technical reliance on an external service bulletin (Beech Service Bulletin 2607, Revision 1) to define inspection steps (Requirement)","Operational impacts limited to parts availability and aircraft downtime rather than ongoing regulatory reporting or monitoring (Requirement)"],"plain_english_summary":"This AD requires owners/operators of Beechcraft Models 99/99A/A99A/B99/C99 (S/N U‑1 through U‑239) to inspect the main landing gear drag‑leg lock link to confirm the roll‑pin hole is drilled through both walls and to replace any link that fails. Compliance is required within 100 hours TIS after 23 May 1996 to address a reported gear collapse caused by an incompletely drilled hole."}},"importantCases":[],"_links":{"self":"/api/acts/ad-beech-99-5-mlg-drag-leg-lock-link-roll-pin","history":"/api/acts/ad-beech-99-5-mlg-drag-leg-lock-link-roll-pin/history","analysis":"/api/acts/ad-beech-99-5-mlg-drag-leg-lock-link-roll-pin/analysis","conflicts":"/api/acts/ad-beech-99-5-mlg-drag-leg-lock-link-roll-pin/conflicts","importantCases":"/api/acts/ad-beech-99-5-mlg-drag-leg-lock-link-roll-pin/important-cases","documents":"/api/acts/ad-beech-99-5-mlg-drag-leg-lock-link-roll-pin/documents"}}