{"id":"F2006B03936","name":"AD/BEECH 400/9 Amdt 1 - Flap Roller Retention","slug":"ad-beech-400-9-amdt-1-flap-roller-retention","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":43545,"registerId":"commonwealth-F2006B03936-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/BEECH 400/9 Amdt 1 - Flap Roller Retention","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 400 Series Aeroplanes\n\nAD/BEECH 400/9\n\nAmdt 1\n\n  \nFlap Roller Retention 4/97\n\nApplicability: Model 400A aircraft with serial numbers RK-1 through RK-97 and RK-99. Requirement: Action in accordance with Beech Service Bulletin 2522 Revision 1.\n\nNote: FAA AD 96-25-03 Amdt 39-9845 refers.\n\nCompliance: Within 200 hours’ time in service or within 12 months after 27 March 1997, whichever occurs first.\n\nThis Airworthiness Directive becomes effective on 27 March 1997.\n\nBackground: The FAA received reports of undersized tabs on some lock washers, and tabs or inner tangs missing from the washers installed on the flap roller bolts. These discrepancies could result in loss of the roller attach nuts and the flap roller, which could result in loss of a flap when the aircraft is subject to load limit conditions.\n\nAmendment 1 is issued in response to a new FAA AD which requires the replacement of certain previously -installed washers with new and stronger washers, while applicability is extended to include additional aircraft.\n\nThe original issue of this Airworthiness Directive became effective on 13 October 1994.","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":true,"description":"The original 1994 directive applied to a narrower set of aircraft and required less extensive repairs. Amendment 1 expands applicability to additional serial numbers and mandates replacement with stronger washers rather than just inspection/repair, reflecting evolving safety intelligence from the FAA."},"complexity_factors":["Single, clearly defined applicability (specific aircraft serial numbers)","One primary compliance requirement with a straightforward deadline","Minimal cross-referencing (only to FAA AD and manufacturer service bulletin for technical details)","No defined terms section or interpretation provisions","Short, single-purpose instrument with clear background explanation"],"plain_english_summary":"This safety order requires Australian owners, operators and maintenance organisations of specified Beechcraft 400A aircraft (serials RK‑1–RK‑97 and RK‑99) to inspect and replace undersized or missing lock washers on flap rollers with stronger parts. The amendment broadens affected aircraft and mandates compliance within 200 flight hours or 12 months from 27 March 1997. It references the FAA AD and Beechcraft service bulletin for technical instructions."},"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":true,"description":"Amendment 1 extends the AD's applicability to include additional aircraft serial numbers and changes the required action to replace certain previously-installed washers with new, stronger washers (see 'Applicability' and 'Amendment 1' statements)."},"complexity_factors":["Narrow, serial-numbered applicability reduces scope complexity (Applicability).","Mandated work references an external technical document (Beech Service Bulletin 2522 Revision 1), requiring access to and reliance on that bulletin (Requirement).","Dual compliance metric (200 hours’ time in service OR 12 months after 27 March 1997) adds a simple scheduling constraint (Compliance).","Technical maintenance action (inspection/replacement of lock washers) requires certified maintenance capability and parts availability (Background / Requirement).","Amendment extends applicability and alters required hardware (Amendment 1), requiring operators to confirm applicability against serial numbers."],"plain_english_summary":"This Airworthiness Directive requires operators of certain Beechcraft 400A aeroplanes (serial RK-1 to RK-97 and RK-99) to carry out the actions in Beech Service Bulletin 2522 Revision 1 to inspect and replace flap roller lock washers. Compliance is required within 200 hours’ time-in-service or within 12 months after 27 March 1997. The measure responds to reports of undersized or missing washer tabs that could allow roller nuts to loosen and result in flap loss; Amendment 1 extends applicability and mandates stronger replacement washers."}},"importantCases":[],"_links":{"self":"/api/acts/ad-beech-400-9-amdt-1-flap-roller-retention","history":"/api/acts/ad-beech-400-9-amdt-1-flap-roller-retention/history","analysis":"/api/acts/ad-beech-400-9-amdt-1-flap-roller-retention/analysis","conflicts":"/api/acts/ad-beech-400-9-amdt-1-flap-roller-retention/conflicts","importantCases":"/api/acts/ad-beech-400-9-amdt-1-flap-roller-retention/important-cases","documents":"/api/acts/ad-beech-400-9-amdt-1-flap-roller-retention/documents"}}