{"id":"F2005L02837","name":"AD/INST/52 - SVS I and IA Standby Vacuum System","slug":"ad-inst-52-svs-i-and-ia-standby-vacuum-system","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":37821,"registerId":"commonwealth-F2005L02837-current","compilationNumber":null,"startDate":"2026-04-01","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Instruments and Automatic Pilots","sectionType":"division","heading":"Instruments and Automatic Pilots","content":"### Instruments and Automatic Pilots\n\n| AD/INST/52 | SVS I and IA Standby Vacuum System | 11/2005 |\n| ---------- | ---------------------------------- | ------- |\n\n| Applicability: | Precise Flight Inc. Model SVS I and SVS IA standby vacuum system installed by one of the following FAA approved Supplemental Type Certificates (STC). SA2160NM, SA2161NM, SA2162NM, SA2164NM, SA2167NM, SA2168NM, SA2683NM, SE1779NM, SE1780NM or any Precise Flight Inc. SVS I or SVS IA standby vacuum system (SVS) incorporated by local modification action.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              |\n| -------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement:   | 1. Incorporate the Standby Vacuum System AFM SUPPLEMENT (AFMS), dated4 February 2000 in the aircraft flight manual.2. Install placards described in the AFMS in accordance with Standby Vacuum System AFM SUPPLEMENT.3. Upgrade the Model SVS I or SVS IA SVS to the Model VI SVS, install the appropriate placards, and add the installation report including the instructions for continued airworthiness (ICA) to the maintenance schedule for the aircraft in accordance with Precise Flight, Inc. Installation Report No. 08074, Standby Vacuum System Model VI Upgrade Kit, dated 7 January 2000.4. Do not install any Model SVS I or SVS IA SVS without also doing the actions required by Requirements 1, 2 and 3 of this Directive.Note 1: Information to Precise flight Inc standby vacuum systems can be obtained from http://www.preciseflight.comNote 2: FAA AD 2005-11-05 Amdt 39-14107 refers. |\n| Compliance:    | Within 30 days after the effective date of this Directive.Before further flight after incorporating the AFMS in the AFM required by Requirement 1 of this Directive.Within 1 year after the effective date of this Directive.From the effective date of this Directive.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       |\n|                | This Airworthiness Directive becomes effective on 27 October 2005.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            |\n\n| Background: | This Directive is the result of several reports of failed shuttle control valves of the SVS and one report of an aeroplane crash with a fatality in which improper use of the SVS was a factor. The actions specified in this Directive are intended to correct problems with the SVS before failure or malfunction during instrument flight rules (IFR) flight that can lead to pilot disorientation and loss of control of the aircraft. |\n| ----------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |\n\n![](image.001.png)  \nJames Coyne  \nDelegate of the Civil Aviation Safety Authority\n\n15 September 2005","sortOrder":0},{"sectionNumber":"AD/INST/52","sectionType":"part","heading":"AD/INST/52","content":"## AD/INST/52","sortOrder":1},{"sectionNumber":"SVS I and IA Standby Vacuum System","sectionType":"part","heading":"SVS I and IA Standby Vacuum System","content":"## SVS I and IA Standby Vacuum System","sortOrder":2},{"sectionNumber":"11/2005","sectionType":"part","heading":"11/2005","content":"## 11/2005","sortOrder":3}],"analysis":{"flash_summary":{"complexity_score":4,"scope_assessment":{"changed":false,"description":"The directive remains focused on mitigating unsafe failures and improper use of the Precise Flight SVS I and SVS IA units. It does not expand into unrelated subject matter. Its reach includes units installed by local modification as well as under listed STCs, which broadens applicability to cover practical installation paths but is consistent with the directive's safety objective rather than marking a significant scope creep beyond the original purpose."},"complexity_factors":["Four discrete mandatory requirements with different compliance timings (administrative and physical actions)","Applicability tied to a long list of FAA STCs plus any local modification (broadens scope and requires record checks)","Cross-reference to external documents: Precise Flight AFM Supplement (dated), Installation Report No. 08074, and FAA AD 2005-11-05","Mixture of administrative steps (AFM and placards) and engineering work (upgrade kit installation and ICA incorporation)","Short and medium compliance deadlines (within 30 days, before next flight after AFM insertion, within 1 year) create conditional sequencing","Reliance on vendor-specific upgrade kit and installation report (locks compliance to specified kit/instructions)"],"plain_english_summary":"**What this instrument does (mechanically)\n\n- Requires aircraft operators/owners with certain Precise Flight Inc. standby vacuum systems (SVS I or SVS IA) to take four specific actions: 1) add a Precise Flight Standby Vacuum System AFM Supplement (dated 4 February 2000) into the aircraft flight manual (AFM); 2) install the placards described in that AFM supplement; 3) upgrade the installed SVS I or SVS IA to the Model VI SVS using Precise Flight Installation Report No. 08074 (Standby Vacuum System Model VI Upgrade Kit, dated 7 January 2000), fit the appropriate placards and add the installation report and the instructions for continued airworthiness (ICA) to the aircraft maintenance schedule; and 4) ensure that no new SVS I or SVS IA is installed unless actions 1–3 are done at the same time. (These are laid out as Requirements 1–4.)\n\n- Sets deadlines for compliance: incorporate the AFM supplement within 30 days of the directive; fit the placards before the next flight after the AFM supplement is inserted; complete the Model VI upgrade and maintenance-record additions within 1 year; and, from the effective date, prohibit installing an SVS I or SVS IA unless the other requirements are met.\n\n- Applies to Precise Flight Inc. Model SVS I and SVS IA units installed under a specified list of FAA-approved Supplemental Type Certificates (STCs) or any SVS I/IA fitted by local modification.\n\n- Cross-references FAA AD 2005-11-05 and gives Precise Flight contact information for parts/information.\n\nWhy the instrument exists (stated rationale) and what that implies\n\n- CASA states this directive follows reports of failed shuttle control valves in these SVS units and one accident where improper use of the SVS was a factor. The stated objective is to reduce the risk of SVS failure or misuse during instrument meteorological conditions (IFR) that could lead to pilot disorientation and loss of control.\n\nCosts, who pays, and incentives\n\n- Direct costs fall on aircraft owners/operators who have the affected SVS units. Costs include: purchasing and installing the Model VI upgrade kit (parts and labour), installing mandated placards, updating the AFM, updating maintenance schedules and records, and aircraft downtime while work is performed.\n\n- Maintenance organisations and installers capture the concentrated benefit of additional work (service revenue). Aircraft owners bear the dispersed cost of upgrades and paperwork.\n\n- The rule limits private choice over equipment installation: from the effective date an operator cannot install an SVS I or SVS IA unless the AFM supplement, placards and upgrade are put in place. That reduces the option of leaving older SVS units in service without modification.\n\nTrade-offs, implementation risks, and compliance burden\n\n- Timing: the AFM entry must be done quickly (within 30 days), placards before next flight after that, and the physical upgrade within a year — a mixed short/medium timetable that can create scheduling pressure for operators and maintenance shops.\n\n- Supply/implementation risk: upgrade depends on availability of the Model VI upgrade kit and competent installers; if kits or approved installers are scarce, operators may face delays or extra costs.\n\n- Administrative burden: operators must update manuals and maintenance schedules and retain the installation report and ICA. Failure to do so can ground an aircraft for non‑compliance with the directive.\n\nEffects on private enterprise and market dynamics\n\n- Creates demand for maintenance, parts and installation services (benefit to MROs — maintenance, repair and overhaul businesses).\n\n- Does not change competitive regulation of airlines or operators directly, but raises compliance costs for any owner of affected units (which could be a higher relative burden on small-owner/operators compared with larger fleets).\n\nOther practical points and limits of the document\n\n- Applicability is explicitly tied to a list of FAA STCs plus any local modifications, so the directive reaches units fitted both by formal STC and ad hoc local modification.\n\n- The directive relies on a specific Precise Flight installation report and AFM supplement (both dated documents). That channels compliance toward a particular upgrade kit and prescribed placarding and maintenance documentation.\n\n- The directive references an FAA airworthiness directive (FAA AD 2005-11-05) as related material; operators often use such cross-references to align international compliance but responsibility to comply here rests with the Australian directive.\n\nSummary sentence\n\n- Practically, if your aircraft has a Precise Flight SVS I or SVS IA (installed under the listed STCs or by local modification), you must promptly add a supplied AFM supplement and placards, complete a Model VI upgrade and update maintenance records within the stated timeframes; failure to do so prevents legal installation of the older units and can render the aircraft non-compliant.**"},"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"},"kimi_summary":{"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"This is a standard single-issue Airworthiness Directive maintaining its original narrow scope. It addresses a specific safety defect in a specific aircraft component without expanding into broader regulatory territory."},"complexity_factors":["Single-purpose instrument: only regulates one specific aircraft component (SVS I/IA standby vacuum system)","Limited applicability: clear list of 9 specific FAA STC numbers plus catch-all for local modifications","Four straightforward requirements with minimal conditional logic","Simple compliance timeline with four distinct deadlines (30 days, before further flight, 1 year, and immediate ongoing prohibition)","Only one defined term requiring external reference (AFMS = Aircraft Flight Manual Supplement)","No nested exceptions or complex cross-referencing to other legislation","Background provides clear safety rationale without legal obfuscation","Document appears to be a scanned/OCR'd version with formatting artifacts (repeated headers) but content is complete"],"plain_english_summary":"CASA orders owners of aircraft fitted with Precise Flight SVS I or SVS IA standby vacuum systems (including locally modified installs under FAA STCs) to take mandated safety actions—interim flight‑manual updates and placards, and ultimately retrofit to the newer Model VI system. \n\nThe AD responds to repeated valve failures and a fatal accident: the standby vacuum is vital for instrument flying, and the measures prevent unexpected loss of critical backup instruments."}},"importantCases":[],"_links":{"self":"/api/acts/ad-inst-52-svs-i-and-ia-standby-vacuum-system","history":"/api/acts/ad-inst-52-svs-i-and-ia-standby-vacuum-system/history","analysis":"/api/acts/ad-inst-52-svs-i-and-ia-standby-vacuum-system/analysis","conflicts":"/api/acts/ad-inst-52-svs-i-and-ia-standby-vacuum-system/conflicts","importantCases":"/api/acts/ad-inst-52-svs-i-and-ia-standby-vacuum-system/important-cases","documents":"/api/acts/ad-inst-52-svs-i-and-ia-standby-vacuum-system/documents"}}