{"id":"F2006B04107","name":"AD/BEECH 60/46 - Lower Forward Wing Bolt","slug":"ad-beech-60-46-lower-forward-wing-bolt","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":43791,"registerId":"commonwealth-F2006B04107-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"AIRWORTHINESS DIRECTIVE","sectionType":"part","heading":"AIRWORTHINESS DIRECTIVE","content":"# AIRWORTHINESS DIRECTIVE\n\n![](image.001.png)\n\n![](image.001.png)  \nFor the reasons set out in the background section, the CASA delegate whose signature appears below issues the following Airworthiness Directive (AD) under subregulation 39.1 (1) of CAR 1998. The AD requires that the action set out in the requirement section (being action that the delegate considers necessary to correct the unsafe condition) be taken in relation to the aircraft or aeronautical product mentioned in the applicability section: (a) in the circumstances mentioned in the requirement section; and (b) in accordance with the instructions set out in the requirement section; and (c) at the time mentioned in the compliance section.\n\nBeechcraft 60 (Duke) Series Aeroplanes","sortOrder":0},{"sectionNumber":"AD/BEECH 60/46 Lower Forward Wing Bolt 5","sectionType":"part","heading":"AD/BEECH 60/46 Lower Forward Wing Bolt 5/2001","content":"# AD/BEECH 60/46 Lower Forward Wing Bolt 5/2001\n\nApplicability: Beech Models 60, A60, and B60 aircraft, serial numbers P-4 through P-596. Requirement: 1. Inspect the lower forward wing bolts (left and right) for the “Mercury Aerospace”\n\ntrademark in accordance with the Accomplishment Instructions of Raytheon Mandatory Service Bulletin SB 57-3328 Issued July 1999.\n\n2. Replace any lower forward wing bolt that has the “Mercury Aerospace” trademark with an FAA-approved bolt, and replace the associated nuts and washers; in accordance with SB 57-3328.\n\nNote: FAA AD 2001-02-10 Amdt 39-12094 refers.\n\nCompliance: 1. Within 100 hours’ time in service after 17 May 2001, unless already accomplished.\n\n2. Before further flight.\n\nThis Airworthiness Directive becomes effective on 17 May 2001.\n\nBackground: The FAA received a report that wing bolts supplied by Mercury Aerospace may not meet the required Rockwell hardness specifications. Continued aircraft operation with such bolts could result in fatigue failure of the bolts with consequent separation of the wing from the aircraft.\n\n![](image.002.png)  \n\nDavid Alan Villiers\n\nDelegate of the Civil Aviation Safety Authority 2 April 2001\n\n![](image.001.png)","sortOrder":1}],"analysis":{"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The AD does not broaden or narrow scope beyond correcting the unsafe condition identified. It targets Beech Models 60/A60/B60 serial P‑4 to P‑596 and mandates inspection and replacement of lower forward wing bolts per Raytheon SB 57‑3328, with specified timing (Applicability; Requirement; Compliance; Background)."},"complexity_factors":["Narrow applicability: specific aircraft models and serial numbers (Applicability).","Technical inspection and replacement must follow a manufacturer service bulletin (Raytheon SB 57‑3328) — reliance on external technical instructions (Requirement).","Parts standard: replacement must be with an FAA‑approved bolt and include associated nuts and washers (Requirement).","Clear compliance timings: inspection within 100 flight hours after 17 May 2001; replacement before further flight (Compliance).","Safety-critical consequence (possible wing separation) raises urgency but not procedural complexity (Background).","Operational impact: owners/operators bear costs for parts, labour and aircraft downtime."],"plain_english_summary":"This AD requires owners/operators of Beech Models 60, A60 and B60 (serials P‑4 to P‑596) to inspect lower forward wing bolts for a \"Mercury Aerospace\" mark and, if present, replace the bolt plus nuts and washers with an FAA‑approved bolt per Raytheon SB 57‑3328. Inspection must occur within 100 flight hours after 17 May 2001; replacements before further flight. The AD responds to reports that Mercury bolts may fail Rockwell hardness specifications, risking fatigue and wing separation; owners bear inspection, replacement and downtime costs."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This Airworthiness Directive maintains its original narrow scope. It addresses a specific safety defect in a specific aircraft model's wing attachment hardware. There is no evidence of scope creep; the directive remains tightly focused on the Mercury Aerospace bolt hardness issue as originally identified."},"complexity_factors":["Single, specific aircraft type and limited serial number range (P-4 through P-596)","Only 2 defined requirements (inspect and replace)","Clear, unconditional compliance timeframe (100 hours or before next flight)","No nested exceptions or conditional logic","References only one external technical document (Raytheon SB 57-3328) and one related FAA directive","Short document (approximately 250 words excluding headers and signatures)"],"plain_english_summary":"This Airworthiness Directive orders owners/operators of specified Beechcraft Duke models (serial P-4 to P-596) to inspect lower forward wing bolts for Mercury Aerospace manufacture and to replace any found with approved bolts, nuts and washers per Raytheon SB 57-3328.  \n\nIt matters because Mercury bolts may be under‑hard, risking metal fatigue and wing separation; inspections must occur within 100 flight hours after 17 May 2001 and replacements before further flight if nonconforming bolts are found."},"flash_summary_failed":{"failed":true,"reason":"A positive credit balance is required for all requests, including BYOK, so fallback providers remain available. Add credits at https://vercel.com/d?to=%2F%5Bteam%5D%2F%7E%2Fai%3Fmodal%3Dtop-up to continue.","source":"analysis-cron"}},"importantCases":[],"_links":{"self":"/api/acts/ad-beech-60-46-lower-forward-wing-bolt","history":"/api/acts/ad-beech-60-46-lower-forward-wing-bolt/history","analysis":"/api/acts/ad-beech-60-46-lower-forward-wing-bolt/analysis","conflicts":"/api/acts/ad-beech-60-46-lower-forward-wing-bolt/conflicts","importantCases":"/api/acts/ad-beech-60-46-lower-forward-wing-bolt/important-cases","documents":"/api/acts/ad-beech-60-46-lower-forward-wing-bolt/documents"}}