{"id":"F2008L04009","name":"AD/CASA/26 Amdt 2 - Steering System Hydraulic Installation","slug":"ad-casa-26-amdt-2-steering-system-hydraulic-installation","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":75820,"registerId":"commonwealth-F2008L04009-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Casa 212 Series Aeroplanes","sectionType":"division","heading":"Casa 212 Series Aeroplanes","content":"### Casa 212 Series Aeroplanes\n\n| AD/CASA/26 Amdt 2 | Steering System Hydraulic Installation | 12/2008 |\n| ----------------- | -------------------------------------- | ------- |\n\n| Applicability: | All Model C-212 series aeroplanes. |\n| -------------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement: | 1. Unless previously accomplished, do the actions in Requirements (1)(a) and (1)(b) of this Directive in accordance with the applicable service bulletin.(a) Rework the nose landing gear (NLG) in accordance with the Accomplishment Instructions of CASA Service Bulletin 212-32-21,Revision 2 dated 10 November 1987.(b) Modify the hydraulic steering system of the NLG in accordance with the Instructions for Accomplishment of CASA Service Bulletin SB-212-32-22 Revision 2 dated 28 July 1997.2. Test the cable tension of the nosewheel steering system. Adjust the tension, if necessary. Accomplish these actions in accordance with CASA COM 212-172 Revision 4 dated 9 December 2002, or CASA COM 212-173 Revision 3 dated22 February 1995; as applicable.3. Revise the Limitations Section of the Aeroplane Flight Manual (AFM) to include the following statement. This may be accomplished by inserting a copy of this AD in the AFM.\"Nose wheel malfunction during take-off run-Initiate or \"perform\" normal RTO procedures.\"Note 1: When a statement identical to that in Requirement 3 of this Directive has been included in the general revisions of the AFM, the general revisions may be inserted into the AFM, and the copy of this Directive may be removed from the AFM.4. Do not install on any aeroplane a NLG unless it has been reworked in accordance with paragraph (1)(a) of this AD.Note 2: Spanish AD 01/02 dated 17 April 2002 refers. |\n\n| Compliance: | For Requirement 1 - Remains unchanged as: Before 30 May 2006.For Requirement 2 - At intervals not to exceed 600 flight hours or whenever any abnormal vibration of the nosewheel steering system occurs.For Requirement 3 - Remains unchanged as: Within 6 months after the effective date of the original issue of this Directive, unless previously accomplishedFor Requirement 4 - From the effective date of this Directive. |\n| ----------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |\n| | This Amendment becomes effective on 20 November 2008. |\n| Background: | This Directive requires rework of the nose landing gear; modification of the hydraulic steering system; a test of the cable tension for the nosewheel steering system when abnormal vibration occurs, and adjustment of the cable tension, if necessary; and a revision to the Limitations section of the aeroplane flight manual to include certain procedures to be performed during the takeoff run. This action is necessary to prevent failure of the auxiliary landing gear direction system, which could result in abnormal vibrations during takeoff and landing runs, and consequent reduced controllability of the aeroplane. This action is intended to address the identified unsafe condition.Amendment 1 extended the compliance period for the replacement of certain parts due to the manufacturer being able to supply those parts in the required time frame. The other requirements detailed in this directive still remain in force to address the unsafe condition.Amendment 2 corrects an error in the compliance section with regard to the inspection interval following any abnormal vibration within the nosewheel steering system occurs.The original issue of this Directive became effective on 17 March 2005.Amendment 1 of this Directive became effective 10 September 2005. |\n\n![](image.001.png) \nCharles Lenarcic \nDelegate of the Civil Aviation Safety Authority\n\n9 October 2008","sortOrder":0},{"sectionNumber":"AD/CASA/26 Amdt 2","sectionType":"part","heading":"AD/CASA/26 Amdt 2","content":"## AD/CASA/26 Amdt 2","sortOrder":1},{"sectionNumber":"Steering System Hydraulic Installation","sectionType":"part","heading":"Steering System Hydraulic Installation","content":"## Steering System Hydraulic Installation","sortOrder":2},{"sectionNumber":"12/2008","sectionType":"part","heading":"12/2008","content":"## 12/2008","sortOrder":3}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"This amendment maintains the original scope of addressing nose landing gear steering system safety. Amendment 2 is purely corrective — it fixes an error in the compliance timing for inspections following abnormal vibrations. The substantive safety requirements remain unchanged from the original 2005 directive."},"complexity_factors":["Short, single-purpose document (4 main requirements only)","Minimal defined terms (only standard aviation abbreviations like NLG, AFM, RTO)","Clear cross-references to specific service bulletins and manuals with revision numbers and dates","Simple conditional logic (\"unless previously accomplished\", \"as applicable\")","Straightforward compliance table with specific deadlines and intervals","No nested exceptions or complex definitional sections"],"plain_english_summary":"This CASA Airworthiness Directive mandates owners and operators of CASA 212 series aeroplanes to repair and modify the nose landing gear and hydraulic steering per manufacturer guidance, perform recurring cable-tension checks, update the flight manual with emergency procedures, and prohibit use of un-reworked nose gear. It addresses a safety risk from nose-wheel steering failures that can cause dangerous vibrations and control problems; Amendment 2 corrects a prior inspection-timing error."},"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":6,"scope_assessment":{"changed":false,"description":"The core scope remains the same: rework/modify the NLG and steering system, test/adjust cable tension, revise the AFM, and prohibit installing non‑reworked NLGs. Amendments did not add new mandatory types of work; they only extended a compliance period for certain part replacements and corrected an error in the inspection‑interval wording (Background; Compliance)."},"complexity_factors":["Multiple mandatory technical actions across maintenance and operational documents (rework NLG; modify hydraulic steering; test/adjust cable tension; revise AFM) (Requirement 1–3).","Cross‑references to several external CASA documents and service bulletins that must be followed exactly (CASA Service Bulletin 212‑32‑21 Rev 2; SB‑212‑32‑22 Rev 2; CASA COM 212‑172 Rev 4 or COM 212‑173 Rev 3) (Requirements 1,2).","Recurring inspection interval and conditional inspection trigger (every 600 flight hours or after abnormal vibration) adds scheduling and recordkeeping obligations (Compliance; Requirement 2).","Operational constraint banning installation of non‑reworked NLGs creates parts/maintenance supply and logistics impact (Requirement 4; Compliance).","Mandatory AFM change affects pilot procedures and operational documentation management (Requirement 3; Note 1).","Amendments history: previous extension of compliance period and a correction to compliance wording require careful tracking of effective dates and text changes (Background; Compliance).","Technical aviation content (landing gear hydraulics, steering cable tension) requires qualified maintenance organisations and specific accomplishment instructions, increasing reliance on specialist skills."],"plain_english_summary":"This Directive requires reworking the nose landing gear, modifying the nosewheel hydraulic steering, testing and adjusting nosewheel steering cable tension, and inserting a new AFM limitation instructing pilots to use normal rejected‑takeoff procedures for nosewheel malfunctions. It also prohibits installing a nose landing gear unless reworked.\n\nIt applies to all C‑212 aeroplanes. Owners/operators and maintenance organisations must follow CASA‑specified service bulletins and COMs and bear the costs to prevent a steering‑system failure that can cause abnormal vibrations and reduced controllability."}},"importantCases":[],"_links":{"self":"/api/acts/ad-casa-26-amdt-2-steering-system-hydraulic-installation","history":"/api/acts/ad-casa-26-amdt-2-steering-system-hydraulic-installation/history","analysis":"/api/acts/ad-casa-26-amdt-2-steering-system-hydraulic-installation/analysis","conflicts":"/api/acts/ad-casa-26-amdt-2-steering-system-hydraulic-installation/conflicts","importantCases":"/api/acts/ad-casa-26-amdt-2-steering-system-hydraulic-installation/important-cases","documents":"/api/acts/ad-casa-26-amdt-2-steering-system-hydraulic-installation/documents"}}