{"id":"F2005L03592","name":"AD/F406/15 - Aileron Bearing Corrosion","slug":"ad-f406-15-aileron-bearing-corrosion","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":39198,"registerId":"commonwealth-F2005L03592-current","compilationNumber":null,"startDate":"2026-04-01","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Reims Aviation F406 Series Aeroplanes","sectionType":"division","heading":"Reims Aviation F406 Series Aeroplanes","content":"### Reims Aviation F406 Series Aeroplanes\n\n| AD/F406/15 | Aileron Bearing Corrosion | 13/2005 |\n| ---------- | ------------------------- | ------- |\n\n| Applicability: | REIMS AVIATION INDUSTRIES F406 aircraft from SN 0001 thru 0092 inclusive.                                                                                                                                                                                                                                                                                                                                                                                                                                                  |\n| -------------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement:   | 1. Inspect the aileron brackets and lubricate the aileron bearings in accordance with the accomplishment instructions of the REIMS AVIATION INDUSTRIES Service Bulletin No F406-59 or later DGAC approved revisions.2. Update the AMM Chapter 5-10-01 by inserting Temporary Revision No 6.Note 1: The operator’s maintenance program should reflect the latest revision of the AMM following the inclusion of Temporary Revision No 6.Note 2: DGAC AD F-2005-177 EASA approval No 2005-6388 dated 2 November 2005 refers. |\n| Compliance:    | Within the next 100 flight hours or 3 months after the effective date of this AD, whichever occurs first.                                                                                                                                                                                                                                                                                                                                                                                                                  |\n|                | This Airworthiness Directive becomes effective on 22 December 2005.                                                                                                                                                                                                                                                                                                                                                                                                                                                        |\n| Background:    | This French DGAC has advised of corrosion found on aileron bearings on several aircraft. This condition, if left uncorrected, could result in the loss of the roll control on the aeroplane.                                                                                                                                                                                                                                                                                                                               |\n\n![](image.001.png)  \nJames Coyne  \nDelegate of the Civil Aviation Safety Authority\n\n10 November 2005","sortOrder":0},{"sectionNumber":"AD/F406/15","sectionType":"part","heading":"AD/F406/15","content":"## AD/F406/15","sortOrder":1},{"sectionNumber":"Aileron Bearing Corrosion","sectionType":"part","heading":"Aileron Bearing Corrosion","content":"## Aileron Bearing Corrosion","sortOrder":2},{"sectionNumber":"13/2005","sectionType":"part","heading":"13/2005","content":"## 13/2005","sortOrder":3}],"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":2,"scope_assessment":{"changed":false,"description":"The instrument remains narrowly focused on correcting aileron bearing corrosion for a defined set of F406 serial numbers. It does not broaden the range of affected aircraft or introduce additional unrelated regulatory obligations. The required actions (inspection, lubrication, AMM update) align with the stated safety objective and do not expand the directive’s original purpose."},"complexity_factors":["Short document: two core operative requirements (inspect/lubricate; update AMM).","Single aircraft type and a single serial number range (0001–0092).","One short compliance window: within 100 flight hours or 3 months.","References to external documents (Service Bulletin No F406-59 and Temporary Revision No 6) and to foreign authority approvals (DGAC AD F-2005-177, EASA approval No 2005-6388).","No nested exceptions, few cross-references, and no multiple conditional branches.","Administrative requirement to update AMM and maintenance program (one step of regulatory record-keeping)."],"plain_english_summary":"**What this instrument does (mechanical effect)\n\n- Applies to: REIMS AVIATION INDUSTRIES F406 aeroplanes, serial numbers 0001 through 0092 inclusive. (See \"Applicability\".)\n- Requires two actions by operators/maintenance organisations:  \n  1. Inspect the aileron brackets and lubricate the aileron bearings in accordance with REIMS AVIATION INDUSTRIES Service Bulletin No F406-59 (or any later revision approved by the French DGAC).  \n  2. Update the Aircraft Maintenance Manual (AMM), Chapter 5-10-01, by inserting Temporary Revision No 6.  \n- Timing: complete the inspection/lubrication and AMM update within 100 flight hours or 3 months after the directive’s effective date, whichever comes first.  \n- Legal effect: the directive makes those actions compulsory for the covered aircraft; it cross‑references a French DGAC airworthiness directive and an EASA approval.\n\nWhy the directive says it is needed\n\n- The French DGAC reported corrosion on aileron bearings on several aircraft. The stated safety risk is that if this corrosion is not corrected it could lead to loss of roll control. The instrument therefore mandates inspection, lubrication, and an AMM update to ensure the issue is captured in the operator’s maintenance program (see \"Background\" and the note about AMM revision).\n\nWho it affects and who pays\n\n- Primary affected parties: aircraft owners/operators of the specified F406 serial numbers and their authorised maintenance organisations or contracted MROs.  \n- Actions paid for by operators: the inspection and lubrication work, any necessary replacement or repair of corroded bearings or brackets, and administrative time to insert the temporary AMM revision and reflect it in the operator’s maintenance program.  \n- Independent MROs may perform the work under contract; the directive does not impose supplier or ownership restrictions but does require work to follow the specified service bulletin or DGAC‑approved revisions.\n\nTrade-offs, incentives and practical effects (implementation lens)\n\n- Safety vs cost: the directive targets a specific, safety‑critical component (ailerons). The likely benefit is reduced probability of control loss. The direct costs are inspection, lubrication, and any repairs; those costs fall on the operators of the affected serial numbers.\n- Administrative burden: operators must insert Temporary Revision No 6 into AMM Chapter 5-10-01 and ensure their maintenance program reflects the change (the directive explicitly notes this). That creates a small paperwork/compliance cost and an ongoing record‑keeping obligation.\n- Flexibility: the directive permits compliance in accordance with Service Bulletin F406-59 or any later DGAC‑approved revision. That lets operators follow manufacturer revisions approved by the authority rather than a single fixed document.\n- Implementation risks: availability of qualified maintenance slots, parts (if corrosion requires replacement), and timely access to the approved revisions could delay compliance. The short compliance window (100 flight hours or 3 months) may pressure operators with high utilisation or limited maintenance capacity.\n- Market effects: this is narrowly targeted; it does not change ownership, competition, prices broadly, or contractual freedom beyond requiring compliance with the AD. Independent maintenance providers can carry out the work provided they meet regulatory and quality requirements.\n\nConcrete mechanics to comply (quick checklist)\n\n- Confirm the aeroplane’s serial number falls within 0001–0092.  \n- Obtain Service Bulletin F406-59 (or later DGAC‑approved revision) and Temporary Revision No 6 for AMM Chapter 5-10-01.  \n- Within 100 flight hours or 3 months: inspect aileron brackets, lubricate bearings per the service bulletin, and insert the temporary AMM revision; update the operator’s maintenance schedule to reflect the change.  \n- Keep records of the inspection, lubrication, any repairs, and the AMM update as proof of compliance.\n\nSource attribution and reference points\n\n- The directive references a French DGAC AD (F-2005-177) and an EASA approval (No 2005-6388). Those are cited as the originating safety finding; the Australian instrument implements the corrective steps using the manufacturer service bulletin and a temporary AMM revision.\n\nOverall assessment (neutral)\n\n- The instrument is narrowly focused and prescriptive: it identifies a defined set of aircraft, requires straightforward maintenance steps, and imposes a short deadline. The main cost is borne by the small set of affected operators; the main benefit is reduced risk of aileron failure. The directive relies on an external (DGAC/EASA) finding and permits the use of later DGAC‑approved revisions, which gives some operational flexibility while keeping the required safety outcome clear."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a standard, targeted airworthiness directive addressing a specific safety defect in a specific aircraft type. The scope remains precisely limited to the corrosion issue identified in the background."},"complexity_factors":["Very short document (under 300 words)","Only 2 substantive requirements (inspection/lubrication + manual update)","Single applicability criterion (serial number range)","Simple compliance deadline (whichever occurs first)","No defined terms section","No cross-references to other legislation","Clear, direct language throughout"],"plain_english_summary":"This is an **Airworthiness Directive (AD)** — a mandatory safety order issued by Australia's Civil Aviation Safety Authority (CASA). It applies to specific **Reims Aviation F406 aircraft** (serial numbers 0001 through 0092).\n\n**What it requires:**\n- **Inspect and lubricate** the aileron brackets and bearings following specific instructions from the manufacturer (Reims Aviation Service Bulletin F406-59)\n- **Update the aircraft maintenance manual** by inserting a temporary revision\n\n**Why it matters:**\nFrench aviation authorities found **corrosion on aileron bearings** in several aircraft. If not fixed, this could cause **loss of roll control** — meaning the pilot couldn't bank the aircraft left or right, which is extremely dangerous.\n\n**When it must be done:**\nWithin **100 flight hours or 3 months** after 22 December 2005, whichever comes first.\n\n**Who must comply:**\nOwners and operators of the affected Reims F406 aircraft."}},"importantCases":[],"_links":{"self":"/api/acts/ad-f406-15-aileron-bearing-corrosion","history":"/api/acts/ad-f406-15-aileron-bearing-corrosion/history","analysis":"/api/acts/ad-f406-15-aileron-bearing-corrosion/analysis","conflicts":"/api/acts/ad-f406-15-aileron-bearing-corrosion/conflicts","importantCases":"/api/acts/ad-f406-15-aileron-bearing-corrosion/important-cases","documents":"/api/acts/ad-f406-15-aileron-bearing-corrosion/documents"}}