{"id":"F2006B10850","name":"AD/INST/46 - SVS III Standby Vacuum System","slug":"ad-inst-46-svs-iii-standby-vacuum-system","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":56343,"registerId":"commonwealth-F2006B10850-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.002.png)\n\n![](image.002.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.","sortOrder":0},{"sectionNumber":"AD/INST/46 SVS III Standby Vacuum System","sectionType":"part","heading":"AD/INST/46 SVS III Standby Vacuum System 6/2000","content":"# AD/INST/46 SVS III Standby Vacuum System 6/2000\n\nApplicability: Precise Flight Inc. Model SVS III standby vacuum system installed by one of the following FAA approved Supplemental Type Certificates (STC). SA2160NM, SA2161NM, SA2162NM, SA2163NM, SA2164NM, SA2166NM, SA2167NM,\n\nSA2168NM, SA2683NM or any Precise Flight Inc. SVS III standby vacuum system incorporated by local modification action.\n\nRequirement: 1. For aircraft modified in accordance with one of the above listed STCs. Incorporate the Precise Flight Inc. flight manual supplement in the aircraft flight manual. Affix any placard specified in the flight manual supplement in the location specified.\n\nNote 1: Precise Flight Inc STC flight manual supplements are available on [www.preciseflight.com/technical.html](http://www.preciseflight.com/technical.html)\n\n    2. For aircraft modified by local modification action. Incorporate a copy of the Appendix to FAA AD 99-24-10 in the aircraft flight manual. Affix any placards specified in the Appendix in the location specified.\n\n    3. Inspect the push pull cable, vacuum lines, saddle fittings, and shuttle valve for correct installation and damage in accordance with Section 3.3 of Precise Flight Installation Report No 50050 Revision 25 dated August 26, 1996.\n\nNote 2. Copies of Installation Report No 50050 Revision 25 dated August 26 1996 is available on [www.preciseflight.com/technical.html](http://www.preciseflight.com/technical.html)\n\nNote 3: FAA AD99-24-10 Amendment 39-11434 refers. This AD and associated Appendix is available on [http://av-info.faa.gov/ad/CE/99-24-10.html](http://av-info.faa.gov/ad/CE/99-24-10.html)","sortOrder":1}],"analysis":{"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":"This AD stays within the original, narrowly defined safety purpose: correcting an unsafe condition associated with the Precise Flight SVS III standby vacuum system. It applies only to aircraft with that unit installed under certain STCs or by local modification and prescribes documentation updates, placards, and a focused inspection. The AD references and aligns with FAA AD 99-24-10 and an existing Precise Flight installation report; there is no evidence in the text provided that the directive expands beyond that original safety remit."},"complexity_factors":["Short, single-topic AD limited to one equipment model (SVS III)","Applicability splits into two paths: aircraft modified under a listed STC (10 STCs listed) versus local modification","Three external documents referenced for compliance: Precise Flight flight manual supplement, Precise Flight Installation Report No. 50050 Rev. 25 (Section 3.3), and Appendix to FAA AD 99-24-10","Inspection requirement depends on a specific subsection of an external installation report (Section 3.3), creating a technical dependency","Two distinct types of actions required: documentation/placard changes and a hardware inspection","No detailed compliance time in the excerpt (AD refers to a compliance section), which can add procedural uncertainty"],"plain_english_summary":"**What this directive does (mechanically)\n\n- Requires owners/operators of certain aircraft fitted with the Precise Flight SVS III standby vacuum system to update their aircraft documentation, attach required placards, and inspect key components of the standby vacuum installation. (Applicability; Requirement 1–3)\n\n**Who is affected\n\n- Aircraft that have a Precise Flight Inc. Model SVS III standby vacuum system installed under one of the listed FAA Supplemental Type Certificates (STCs): SA2160NM, SA2161NM, SA2162NM, SA2163NM, SA2164NM, SA2166NM, SA2167NM, SA2168NM, SA2683NM. (Applicability)\n- Aircraft with an SVS III fitted by a local modification (i.e. not under those STCs). (Applicability)\n\n**What you must do\n\n- If your aircraft was modified under one of the listed STCs: add the Precise Flight flight manual supplement to the aircraft flight manual and put any placards the supplement specifies in the locations it specifies. (Requirement 1)\n- If your aircraft was modified by local (non-STC) action: add the Appendix to FAA AD 99-24-10 to the aircraft flight manual and install any placards specified there. (Requirement 2)\n- Inspect the push–pull cable, vacuum lines, saddle fittings, and shuttle valve for correct installation and damage according to Section 3.3 of Precise Flight Installation Report No. 50050 Revision 25 (dated 26 August 1996). (Requirement 3)\n\n**Where the technical instructions come from\n\n- The AD points you to three external documents for the required content and inspection method: the Precise Flight flight manual supplement, Precise Flight Installation Report No. 50050 Rev. 25 (Section 3.3), and Appendix to FAA AD 99-24-10. Links or references to those documents are given in the AD. (Notes 1–3)\n\n**Why the action is required (as stated in the AD)\n\n- The AD is issued to correct an unsafe condition associated with the SVS III standby vacuum system; the directive requires the actions the delegate considers necessary to correct that condition. The AD points to FAA AD 99-24-10 and the Precise Flight installation report as the prescriptive means to eliminate the unsafe condition. (Preamble and Notes)\n\n**Costs, incentives and practical effects (mechanics, not judgement)\n\n- Who pays: the aircraft owner/operator pays for incorporating the flight manual pages, providing and fitting placards, carrying out the inspection, and any repairs or parts that the inspection identifies. (Requirements 1–3)\n- Who decides and certifies compliance: the operator (or their maintenance provider) must perform the required changes and inspections in accordance with the referenced materials; maintenance personnel certify the work. CASA/its delegate enforces compliance by issuing the AD. (Preamble; Requirements)\n- Compliance burden: adding pages to the flight manual and installing placards is low-cost and administrative. The inspection of the cable, vacuum lines, fittings and shuttle valve requires technical maintenance time, possible aircraft downtime, and may lead to corrective work if faults are found. (Requirement 3)\n- Implementation risks and dependencies: the AD relies on external documents (Precise Flight supplements, Installation Report No. 50050 Rev. 25, FAA AD 99-24-10) for the precise procedures. Operators must obtain and follow those documents; accessibility and interpretation of those documents determine inspection quality. (Notes 1–3; Requirement 3)\n- Effects on private providers and market choices: independent maintenance organisations can perform the inspections and any repairs. The directive does not mandate specific suppliers for parts, but following the installation report may direct operators toward Precise Flight replacement parts or procedures. (Requirement 3; Notes)\n\n**Trade-offs and opportunity costs to note\n\n- Time and money spent on compliance (manual updates, placards, inspections, repairs) are incurred by operators and reduce available operating hours until work is completed.\n- The AD’s requirement to follow specific installation/inspection instructions reduces variation in how operators remediate the condition (less scope for bespoke fixes), which both standardises safety steps and channels service work to those able to meet the specified procedures. (Requirement 1–3)\n\n**Practical next steps for an affected operator\n\n- Identify whether the SVS III was installed under one of the listed STCs or by a local modification. (Applicability)\n- Obtain the Precise Flight flight manual supplement or Appendix to FAA AD 99-24-10 (as directed). (Requirement 1–2; Notes 1–3)\n- Install required placards in the locations specified. (Requirement 1–2)\n- Arrange qualified maintenance personnel to inspect the push–pull cable, vacuum lines, saddle fittings and shuttle valve per Section 3.3 of Installation Report No. 50050 Rev. 25 and carry out any corrective work. (Requirement 3)\n\n(References in parentheses indicate the part of the AD that requires or describes the action.)"},"kimi_summary":{"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"This AD appears focused on its original purpose: addressing a specific unsafe condition in the SVS III Standby Vacuum System. The scope is narrow and targeted, covering only this particular equipment and requiring specific documentation and inspection actions. There is no evidence of scope creep or expansion beyond the original safety issue."},"complexity_factors":["Short, single-purpose directive with only 3 requirements","Minimal defined terms (only standard aviation acronyms like STC, FAA, AD)","No nested conditional logic or exceptions","Simple structure: Applicability → Requirement → Compliance (though compliance section appears truncated in this extract)","Heavy reliance on external documents (FAA AD 99-24-10, Precise Flight Installation Report No 50050) rather than reproducing technical details inline","Clear, imperative language ('Incorporate', 'Affix', 'Inspect')"],"plain_english_summary":"This AD mandates safety fixes for aircraft equipped with the Precise Flight SVS III Standby Vacuum System: operators must adopt the required flight‑manual supplement, fit prescribed warning placards, and perform a detailed inspection of cables, vacuum lines, fittings, and valves per the manufacturer’s technical report. It applies to aircraft with the SVS III installed via FAA STCs or local modifications. \n\nThe measures prevent loss of critical backup instruments from faulty or improperly installed standby vacuum systems."}},"importantCases":[],"_links":{"self":"/api/acts/ad-inst-46-svs-iii-standby-vacuum-system","history":"/api/acts/ad-inst-46-svs-iii-standby-vacuum-system/history","analysis":"/api/acts/ad-inst-46-svs-iii-standby-vacuum-system/analysis","conflicts":"/api/acts/ad-inst-46-svs-iii-standby-vacuum-system/conflicts","importantCases":"/api/acts/ad-inst-46-svs-iii-standby-vacuum-system/important-cases","documents":"/api/acts/ad-inst-46-svs-iii-standby-vacuum-system/documents"}}