{"id":"F2006B07623","name":"AD/Y12/9 - Central Control Pedestal","slug":"ad-y12-9-central-control-pedestal","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":50348,"registerId":"commonwealth-F2006B07623-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\nHarbin Y12 Series Aeroplanes","sortOrder":0},{"sectionNumber":"AD/Y12/9 Central Control Pedestal 3/2003","sectionType":"part","heading":"AD/Y12/9 Central Control Pedestal 3/2003","content":"# AD/Y12/9 Central Control Pedestal 3/2003\n\nApplicability: Y12 aeroplanes listed in Harbin Aircraft Manufacturing Corporation Service Bulletin (SB) Y12-76-0036 dated 3 August 1992.\n\nRequirement: If not previously accomplished, modify the central control pedestal in accordance with SB Y12-76-0036.\n\nThis modification should be incorporated in conjunction with the modification to the flap motoreducer, SB Y12-27-0035 and AD/Y12/10 refers.\n\nNote: China CAAC AD CAD92-Y012-04 Amdt 39-0811 refers.\n\nCompliance: Before 30 June 2003.\n\nThis Airworthiness Directive becomes effective on 20 March 2003.\n\nBackground: This Directive requires the modification of the central control pedestal power lever reverse locking unit, the control switch panel and indicator light. These modifications are designed to prevent inadvertent operation of the reverse locking device at idle, which may cause the power lever to enter reverse.\n\n![Signature of James Coyne Delegate of the Civil Aviation Safety Authority](image.002.png)  \n\nJames Coyne\n\nDelegate of the Civil Aviation Safety Authority 3 February 2003\n\n![](image.001.png)  \n\nThe above AD is notified in the Commonwealth of Australia Gazette on 26 February 2003.","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":"The AD implements the modification set out in Service Bulletin Y12-76-0036 and references the China CAAC AD; it does not broaden or narrow the set of affected aircraft or the required technical action beyond those referenced documents (Applicability; Requirement; Note)."},"complexity_factors":["Limited, aircraft-specific applicability — only Y12 aeroplanes listed in SB Y12-76-0036 (Applicability).","Single technical corrective action required: modification of the central control pedestal per the manufacturer's service bulletin (Requirement).","Must be coordinated with a related flap motoreducer modification and referenced AD (SB Y12-27-0035 and AD/Y12/10) (Requirement).","Fixed compliance deadline and effective date impose scheduling pressure on operators (Compliance; AD effective date).","Reliance on the service bulletin for method and detail concentrates technical discretion with the manufacturer and the maintenance provider (Requirement).","Administrative/regulatory basis is a CASA delegate issuing an AD under subregulation 39.1(1) of CAR 1998, which creates mandatory compliance (preamble).","Direct operator cost and downtime to perform the modification (implicit from Requirement/Background)."],"plain_english_summary":"This AD requires operators of Harbin Y12 aeroplanes listed in Service Bulletin Y12‑76‑0036 to modify the central control pedestal (power‑lever reverse‑locking unit, switch panel and indicator light) in accordance with that SB. CASA issued the directive with an effective date of 20 March 2003 and a compliance deadline of 30 June 2003.\n\nOwners/operators must arrange and pay for the modification, which should be done alongside the flap motoreducer modification per SB Y12‑27‑0035 (see AD/Y12/10). The change aims to prevent inadvertent reverse engagement at idle."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This AD maintains its original narrow scope — a specific safety modification for a specific aircraft type's control pedestal. No evidence of scope creep; it addresses exactly the unsafe condition described in the background."},"complexity_factors":["Single, discrete modification requirement with clear reference to external technical document (Service Bulletin Y12-76-0036)","No defined terms section — relies entirely on referenced manufacturer documentation","Simple conditional logic: only applies if modification 'not previously accomplished'","Single compliance date with no phased or alternative compliance pathways","Brief background section explaining safety rationale in plain language","Cross-reference to related AD (AD/Y12/10) for concurrent modification, but this does not complicate the primary obligation"],"plain_english_summary":"CASA issued an Airworthiness Directive requiring Harbin Y12 owners/operators to modify the central control pedestal—installing an improved reverse-locking mechanism and updated switches/indicators per SB Y12-76-0036—to prevent the power lever from accidentally slipping into reverse.  \n\nApplies to aircraft covered by the August 1992 service bulletin; effective 20 March 2003 with compliance required before 30 June 2003. The mandated one-time change prevents unexpected reverse thrust and possible loss of control."}},"importantCases":[],"_links":{"self":"/api/acts/ad-y12-9-central-control-pedestal","history":"/api/acts/ad-y12-9-central-control-pedestal/history","analysis":"/api/acts/ad-y12-9-central-control-pedestal/analysis","conflicts":"/api/acts/ad-y12-9-central-control-pedestal/conflicts","importantCases":"/api/acts/ad-y12-9-central-control-pedestal/important-cases","documents":"/api/acts/ad-y12-9-central-control-pedestal/documents"}}