{"id":"F2006B01920","name":"AD/A320/29 Amdt 1 - Ram Air Turbine Bearing End-Float","slug":"ad-a320-29-amdt-1-ram-air-turbine-bearing-end-float","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":41142,"registerId":"commonwealth-F2006B01920-current","compilationNumber":null,"startDate":"2026-04-01","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/A320/29 Amdt 1 - Ram Air Turbine Bearing End-Float","content":"COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 \\- 105 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n![](image.001.png)  \nAirbus Industrie A319, A320 and A321 Series Aeroplanes\n\nAD/A320/29\n\nAmdt 1\n\n  \nRam Air Turbine Bearing End-Float 9/95\n\nApplicability: All A320 series aircraft fitted with P/N 680203020 or 680203021 or 680203027 Ram Air Turbine and not incorporating Airbus Industries modification 24701 or Airbus Industries SB A320-29-1065.\n\nRequirement: 1. Action in accordance with Airbus Service Bulletin A320-29-1061.\n\n2. Unless previously carried out action in accordance with Airbus Service Bulletin A320-29-1065.\n\nNote: DGAC AD 93-057-041(B)R1 and Dowty Aerospace Hydraulics \\- Cheltam Service Bulletin No 600-29-171 refers.\n\nCompliance: 1. The effective date specified in the original issue remains unchanged at 13 July 1993.\n\n2. Prior to 30 June 1997.\n\nNote: Compliance with Airbus Industries SB A320-29-1065 provides terminating action for this directive.\n\nBackground: The manufacturer has advised that a Ram Air Turbine became detached from its leg during a ground functional test. This amendment provides terminating action for this directive.","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"This amendment (Amdt 1) remains tightly focused on its original purpose — addressing the Ram Air Turbine bearing defect. The amendment adds a terminating action (compliance with SB A320-29-1065) that allows operators to permanently satisfy the directive, but this is a natural evolution of the safety remedy rather than scope creep. The applicability and core requirement remain unchanged from the original 1993 directive."},"complexity_factors":["Short, single-purpose directive (2 pages)","Limited applicability defined by specific part numbers and modification status","Two alternative compliance paths with clear terminating action","Minimal cross-referencing (only to specific Airbus Service Bulletins and one French aviation authority directive)","No nested conditional logic or exceptions","Straightforward compliance dates with one amendment updating the original"],"plain_english_summary":"This AD requires owners/operators of Airbus A319/A320/A321 aircraft fitted with certain Ram Air Turbine (RAT) parts to inspect or modify the RAT per Airbus service instructions unless already modified by the permanent fix. \n\nIt responds to a reported RAT detachment in testing that could allow the RAT to fall off in flight and deprive the aircraft of emergency hydraulic power, creating a serious loss-of-control risk."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":true,"description":"This amendment adds a terminating action option (Airbus SB A320‑29‑1065) to the original directive while keeping the original effective date and specifying a compliance deadline. Applicability remains limited to aircraft with listed RAT part numbers and those not already modified; the amendment thus narrows ongoing obligations for operators that adopt the terminating modification."},"complexity_factors":["Technical maintenance instructions referenced only by Airbus Service Bulletins (A320‑29‑1061 and A320‑29‑1065)","Applicability tied to specific part numbers and exclusion if Airbus mod 24701 or SB A320‑29‑1065 already incorporated","Single clear compliance deadline (prior to 30 June 1997) plus an unchanged original effective date","Interaction between mandatory AD actions and optional (but terminating) service bulletin action","Operational and cost impacts borne by aircraft operators (inspection/repair scheduling and parts/labour)","Regulatory enforcement by CASA under Part 39 with cross-references to DGAC and supplier service bulletins"],"plain_english_summary":"Requires operators of A319/A320/A321 aircraft fitted with specified Ram Air Turbine (RAT) part numbers to carry out maintenance actions in Airbus Service Bulletin A320‑29‑1061, and allows a terminating modification in SB A320‑29‑1065. CASA mandates compliance by the published dates after a manufacturer report that a RAT detached during a ground test. Aircraft operators must schedule and pay for inspections/repairs and may adopt the terminating modification to stop recurring requirements."}},"importantCases":[],"_links":{"self":"/api/acts/ad-a320-29-amdt-1-ram-air-turbine-bearing-end-float","history":"/api/acts/ad-a320-29-amdt-1-ram-air-turbine-bearing-end-float/history","analysis":"/api/acts/ad-a320-29-amdt-1-ram-air-turbine-bearing-end-float/analysis","conflicts":"/api/acts/ad-a320-29-amdt-1-ram-air-turbine-bearing-end-float/conflicts","importantCases":"/api/acts/ad-a320-29-amdt-1-ram-air-turbine-bearing-end-float/important-cases","documents":"/api/acts/ad-a320-29-amdt-1-ram-air-turbine-bearing-end-float/documents"}}