{"id":"F2006B04103","name":"AD/BEECH 60/42 Amdt 1 - Wing Bolt, Nut and Fitting","slug":"ad-beech-60-42-amdt-1-wing-bolt-nut-and-fitting","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":43783,"registerId":"commonwealth-F2006B04103-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/BEECH 60/42 Amdt 1 - Wing Bolt, Nut and Fitting","content":"![](image.001.png)\n\n![](image.001.png)  \nAIRWORTHINESS DIRECTIVE\n\nFor the reasons set out in the background section, the CASA delegate whose signature appears below revokes Airworthiness Directive (AD) AD/BEECH 60/42 and issues the following 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\n![](image.001.png)\n\nBeechcraft 60 (Duke) Series Aeroplanes\n\nAD/BEECH 60/42\n\nAmdt 1\n\n  \nWing Bolt, Nut and Fitting 2/2002\n\nApplicability: All models.\n\nRequirement: 1. Remove and inspect wing bolts, washers, nuts and fittings in accordance with Beechcraft Duke 60 Series Maintenance Manual 60-590001-25A18.\n\n2. Retire wing bolts, washers and nuts from service and replace with new hardware in accordance with Beechcraft Duke 60 Series Maintenance Manual 60-590001- 25A18. Render unserviceable all hardware retired.\n\nNote: The bolt torque should be checked before replacement to confirm bolt has been torqued to correct value. If the torque value is incorrect, other maintenance action may be required.\n\nCompliance: 1. Unless inspection has already been accomplished in accordance with the Requirement Document, initially inspect before 5 calendar years from initial installation, or within 100 hours’ time in service after 1 February 1996, whichever occurs later. Re-inspect at intervals not to exceed 5 calendar years.\n\n2. Retire before 15 calendar years after initial installation, or within 100 hours’ time in service after 1 February 1996, whichever occurs later.\n\nWhere date of initial installation is unknown, the date of manufacture of the aircraft must be used for paragraphs 1 and 2.\n\nThis amendment becomes effective on 21 February 2002.\n\nBackground: This AD makes mandatory the inspection and replacement periods for the wing attachment hardware detailed in the Requirement Document.\n\nAmdt 1 - Adds the Note to Requirement 2 and the fittings as an item to be inspected when the wing bolts, washers and nuts are removed and inspected.\n\nBeechcraft 60 (Duke) Series Aeroplanes\n\nAD/BEECH 60/42 Amdt 1 (continued)\n\nThe original issue of this Airworthiness Directive became effective on 1 February 1996.\n\n![](image.002.png)  \n\nEugene Paul Holzapfel\n\nDelegate of the Civil Aviation Safety Authority 3 January 2002\n\n![](image.001.png)  \n\nThe above AD is notified in the Commonwealth of Australia Gazette on 30 January 2002.","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"This amendment remains tightly focused on its original purpose: ensuring airworthiness of wing attachment hardware on Beechcraft Duke aircraft. The changes are minor clarifications (adding fittings to inspection scope and a torque-check note) rather than expansion into new operational areas."},"complexity_factors":["Multiple interacting time-based triggers (calendar years vs flight hours vs specific dates)","Conditional logic for unknown installation dates (defaults to manufacture date)","Cross-reference to external technical manual (Beechcraft Maintenance Manual 60-590001-25A18) without reproducing contents","Amendment structure requires reading both original and amended text to understand full requirements","Nested timing calculations (initial inspection vs re-inspection vs retirement deadlines)"],"plain_english_summary":"This Airworthiness Directive applies to Beechcraft 60 (Duke) series airplanes and requires periodic inspection and eventual replacement of the wing attachment hardware to prevent catastrophic wing separation. The amendment adds a requirement to verify proper bolt torque from original installation.\n\nOwners, operators and maintenance organisations must comply with the time‑limited inspection and 15‑year replacement mandate."},"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"},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The amendment (Amdt 1) made minor adjustments to the original AD: it added the fittings to the list of items to be inspected and added a Note requiring a bolt-torque check prior to replacement. These changes clarify and slightly broaden the items subject to inspection but do not materially expand the AD’s fundamental scope or purpose (which remains mandatory inspection and retirement/replacement of wing attachment hardware)."},"complexity_factors":["Single aircraft type and narrow subject matter (wing attachment hardware) limits scope","Few parts: two main Requirements (inspect; retire/replace)","Cross-reference to one external technical document: Beechcraft Duke 60 Series Maintenance Manual 60-590001-25A18","Two conditional timing tests (whichever occurs later between calendar years and 100 hours TIS after 1 Feb 1996) and a recurrent 5-year interval","One minor interpretive rule for unknown installation dates (use aircraft manufacture date)","Small amendment: addition of \"fittings\" to inspection list and a Note about bolt torque — no nested exceptions or multiple tiers of conditions"],"plain_english_summary":"**What this instrument does (mechanics)**\n\n- Applies to all Beechcraft 60 (Duke) series aeroplanes. (Applicability)\n- Requires removal and inspection of the wing attachment hardware — specifically wing bolts, washers, nuts and fittings — in accordance with the Beechcraft Duke 60 Series Maintenance Manual 60-590001-25A18. (Requirement 1)\n- Requires retired wing bolts, washers and nuts to be removed from service and replaced with new hardware; retired hardware must be rendered unserviceable. (Requirement 2)\n- Adds a note that the bolt torque should be checked before replacement; if torque is incorrect, additional maintenance may be required. (Note to Requirement 2)\n\n**When the work must be done (timing / compliance)**\n\n- Initial inspection: before 5 calendar years from initial installation, or within 100 hours’ time in service after 1 February 1996, whichever is later. If already inspected to the Requirement Document, that satisfies the initial inspection. Re-inspect at intervals not to exceed 5 calendar years. (Compliance 1)\n- Retirement: hardware must be retired before 15 calendar years after initial installation, or within 100 hours’ time in service after 1 February 1996, whichever is later. (Compliance 2)\n- If the date of initial installation is unknown, the aircraft’s date of manufacture is to be used for calculating the inspection and retirement dates. (Compliance)\n\n**Who this affects**\n\n- Aircraft owners and operators of Beechcraft 60/Duke series aeroplanes — they must schedule and pay for inspections, replacement parts and associated labour and downtime.\n- Maintenance organisations and technicians who perform the inspections and replacements — they must follow the referenced maintenance manual procedures and record compliance.\n- Parts suppliers who provide the specified replacement bolts, washers, nuts and fittings — demand for new hardware is mandatory when retirement dates are reached. (Requirement; Compliance)\n\n**Who decides and enforces**\n\n- The Civil Aviation Safety Authority (CASA), via a delegate exercising powers under subregulation 39.1(1) of the Civil Aviation Regulations 1998, issues and enforces the directive. Compliance is mandatory under the regulatory framework cited. (preamble)\n\n**Why it matters (stated purpose and practical effects)**\n\n- The instrument’s stated objective is to correct an unsafe condition by making mandatory the inspection and replacement intervals for wing attachment hardware. (Background)\n- Mechanically, it forces periodic inspection and finite service life for specific structural fasteners, which is intended to reduce the risk of hardware failure at the wing attachment points.\n\n**Costs, incentives and trade-offs**\n\n- Who pays: aircraft owners/operators pay for inspections, parts, labour and aircraft downtime. Maintenance organisations incur workload and must follow the referenced manual. Parts suppliers gain concentrated demand for replacement hardware.\n- Behaviour changes imposed: owners must track installation dates (or use manufacture date), schedule recurring inspections every five years, and replace hardware before the 15-year retirement limit. They may need to check bolt torque and perform extra maintenance if torque is incorrect. (Requirement; Compliance)\n- Opportunity cost: mandated replacement may lead owners to accelerate maintenance spending or defer other upgrades to cover costs and downtime.\n- Implementation risks and practical issues: availability of the specific replacement hardware and authorised service instructions is necessary; unknown initial-installation dates shorten permissible service life (because manufacture date is used), which can increase near-term replacement costs. Disposal must render retired hardware unserviceable, imposing a small additional cost.\n\n**Compliance burden and enforcement risks**\n\n- Administrative burden: record-keeping of installation/manufacture dates and proof of inspections/replacements per the maintenance manual.\n- Enforcement: CASA can require compliance under the CAR regime; non-compliance can affect airworthiness certification and legal ability to operate the aircraft.\n\n**Narrowness of scope and intended effect**\n\n- The AD is narrowly targeted: it covers a specific component group (wing bolts, washers, nuts and fittings) on a single aircraft model series and prescribes inspection intervals and an absolute retirement age for the hardware. (Applicability; Requirement; Compliance)\n\n**Source claims vs. effects**\n\n- The AD claims it addresses an unsafe condition (Background). That claim is implemented by required inspections and a finite service life for the hardware; the practical effects are predictable: increased maintenance activity and parts replacement, concentrated benefits to parts/maintenance providers, and diffuse costs across owners/operators. The text does not quantify risk reduction, nor does it set alternative compliance methods in this document; it relies on the referenced maintenance manual for technical procedures. (Background; Requirement)"}},"importantCases":[],"_links":{"self":"/api/acts/ad-beech-60-42-amdt-1-wing-bolt-nut-and-fitting","history":"/api/acts/ad-beech-60-42-amdt-1-wing-bolt-nut-and-fitting/history","analysis":"/api/acts/ad-beech-60-42-amdt-1-wing-bolt-nut-and-fitting/analysis","conflicts":"/api/acts/ad-beech-60-42-amdt-1-wing-bolt-nut-and-fitting/conflicts","importantCases":"/api/acts/ad-beech-60-42-amdt-1-wing-bolt-nut-and-fitting/important-cases","documents":"/api/acts/ad-beech-60-42-amdt-1-wing-bolt-nut-and-fitting/documents"}}