{"id":"F2006B05261","name":"AD/CESSNA 206/55 - Horizontal Stabiliser Attachment Brackets - 2","slug":"ad-cessna-206-55-horizontal-stabiliser-attachment-brackets-2","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":45613,"registerId":"commonwealth-F2006B05261-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/CESSNA 206/55 - Horizontal Stabiliser Attachment Brackets - 2","content":"![](image.001.png)![](image.001.png)AIRWORTHINESS DIRECTIVE\n\n![](image.001.png)For 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\nCessna 206 Series Aeroplanes\n\nAD/CESSNA 206/55 Horizontal Stabiliser Attachment\n\nBrackets \\- 2\n\n  \n7/2002\n\n| Applicability: | Model            | Serial Numbers                                           |\n| -------------- | ---------------- | -------------------------------------------------------- |\n|                | P206C and TP206C | P206-0420 through P206-0519                              |\n|                | P206D and TP206D | P206-0520 through P206-0603                              |\n|                | P206E and TP206E | P20600604 through P20600647, and P206-0001               |\n|                | U206C and TU206C | U206-0915 through U206-1234                              |\n|                | U206D and TU206D | U206-1235 through U206-1444, U20601445 through           |\n|                |                  | U20601587                                                |\n|                | U206E and TU206E | U20601588 through 20601700                               |\n|                | U206F and TU206F | U20601701 through U20602588, U20602590 through U20603521 |\n|                | U206G and TU206G | 676, U20602589, U20603522 through U20607020              |\n\nRequirement: 1. Check the maintenance records, and determine whether a horizontal stabiliser attachment reinforcement bracket (bracket) part number (P/N) 1232624-1 is installed that was shipped by Cessna from 27 February 1998 through 17 March 2000. If the installed brackets were not shipped by Cessna between 27 February 1998 and 17 March 2000, no further action is required by this Directive.\n\n    2. If the above check reveals that affected P/N 1232624-1 brackets are installed, visually inspect the left and right brackets for existence of seam welds along both the lower inboard and outboard wall/flange.\n    3. If no seam weld is found on the left or right bracket during the Requirement 2 inspection, before further flight, replace with a new or serviceable P/N 1232624- 1 bracket. If the left and right brackets have seam welds along both the lower inboard and outboard wall/flange, no further action is required.\n\nNote: FAA AD 2002-07-01 Amdt 39-12695 refers.\n\nCessna 206 Series Aeroplanes\n\nAD/CESSNA 206/55 (Continued)\n\nCompliance: Within 50 hours time in service after 11 July 2002, unless already accomplished.\n\nThis Airworthiness Directive becomes effective on 11 July 2002.\n\nBackground: The FAA received a report that certain horizontal stabiliser attachment reinforcement brackets were manufactured without seam welds. This Directive specifies actions to detect and replace structurally deficient attachment brackets. Continued use of such brackets could result in structural failure of the horizontal stabiliser.\n\n![](image.002.jpeg)  \n\nDavid Ala n Villiers\n\nDelegate of the Civil Aviation Safety Authority 28 May 2002\n\n![](image.001.png)The above AD is notified in the Commonwealth of Australia Gazette on 19 June 2002.","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a standard airworthiness directive addressing a specific manufacturing defect. The scope remains tightly focused on the identified unsafe condition in the horizontal stabiliser attachment brackets."},"complexity_factors":["Single discrete safety issue with clear sequential steps","Only 7 defined aircraft model groups with specific serial number ranges","Simple conditional logic: check records → inspect → replace if defective","No cross-references to other legislation (only a note about related FAA directive)","Clear compliance deadline with single time trigger","Plain language background explaining the safety risk"],"plain_english_summary":"This safety order requires owners and operators of certain Cessna 206-series aircraft to check whether the horizontal stabiliser bracket (part number 1232624-1) made Feb 1998–Mar 2000 was manufactured without required seam welds. If records show the affected part, inspect left and right brackets; replace any bracket lacking the welds before next flight.\n\nComplete the check within 50 flight hours after 11 July 2002. Missing welds can allow tail separation and catastrophic structural failure, so compliance prevents crashes."},"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"The Directive is narrowly focused on detecting and replacing potentially un-welded horizontal stabiliser reinforcement brackets shipped by Cessna in a specific date window. It does not expand beyond that original safety remediation purpose: the actions (records check, visual inspection, replacement if welds missing) are directly aligned with the stated intent to remove structurally deficient brackets. No significant scope broadening is present in this version."},"complexity_factors":["Short, three-step requirement structure (Requirements 1–3).","Single specific part number (P/N 1232624-1) to check.","Applicability limited to defined Cessna 206 serial-number ranges (table list).","Single, simple visual inspection criterion (seam welds present on two named flange locations).","One compliance deadline (50 hours time-in-service after effective date).","One external cross-reference (FAA AD 2002-07-01).","No nested exceptions or conditional sub-rules beyond the date/part-number filter."],"plain_english_summary":"**What this instrument does (mechanically)**\n\n- Applies to specific Cessna 206-series aeroplanes listed by model and serial number in the Applicability table.\n- Requires operators/maintenance personnel to check maintenance records to see whether a horizontal stabiliser attachment reinforcement bracket (part number P/N 1232624-1) installed on the aeroplane was shipped by Cessna between 27 February 1998 and 17 March 2000 (Requirement 1).\n- If the installed bracket was shipped in that date window, requires a visual inspection of the left and right brackets to confirm the presence of seam welds along both the lower inboard and outboard wall/flange of each bracket (Requirement 2).\n- If either the left or right bracket lacks the seam welds, requires replacement with a new or serviceable P/N 1232624-1 bracket before further flight (Requirement 3). If both brackets have the seam welds, no further action is needed.\n- Compliance deadline: the checks and any required replacement must be done within 50 hours time-in-service after 11 July 2002 (Compliance).\n- Cross-reference: the Directive notes FAA AD 2002-07-01 Amdt 39-12695 as related guidance.\n\n**Who is affected**\n\n- Owners, operators and maintenance organisations responsible for the listed Cessna 206-series aeroplanes (specific serial number ranges are in the Applicability table). The action is targeted at aircraft with the specific bracket part number shipped by Cessna during the stated date range.\n\n**Why it matters (stated purpose and how that translates into risk/control)**\n\n- The Directive states (Background) that the FAA received a report some brackets were manufactured without required seam welds. The stated safety concern is that use of such brackets could lead to structural failure of the horizontal stabiliser.\n- The Directive’s mechanism is identification (records check and visual inspection) and removal (replacement of suspect brackets) of potentially structurally-deficient parts before further flight.\n\n**Operational and economic implications (practical effects)**\n\n- Who pays: aircraft owners/operators bear the cost of checking records, performing inspections and, if necessary, parts and labour to replace defective brackets.\n- Time and downtime: the inspection is visual and should be relatively quick, but replacement (if required) will incur maintenance time and possibly aircraft downtime while a serviceable bracket is sourced and fitted.\n- Supply and maintenance effects: replacement requires a “new or serviceable” P/N 1232624-1 bracket; if many aircraft need replacement, sourcing serviceable parts could cause minor market demand for that part and short-term delays.\n- Decision authority and compliance: licensed maintenance personnel perform the checks and replacements; the CASA delegate issued the AD under the applicable regulation (the instrument sets the compliance obligation and deadline).\n- Behavioural change: operators must check shipping date/records for the specified P/N and inspect bracket welds; if missing, they must replace before further flight.\n\n**Trade‑offs, risks and implementation notes**\n\n- The Directive is narrowly prescriptive: it limits action to a specific P/N and a specific shipping date range, reducing the number of aircraft affected but requiring careful records checks (risk: incomplete or inaccurate records could complicate compliance).\n- The inspection requirement is visual and binary (seam weld present on both lower inboard and outboard wall/flange or not), which simplifies compliance but depends on competent visual inspection.\n- The compliance window (50 hours TIS) creates a short-term surge in inspections and replacements for affected aircraft; operators with little spare capacity may face scheduling and cost pressure.\n- The AD cross-references an FAA AD (useful for technical background and repair instructions) but does not incorporate additional testing or engineering assessments in this instrument.\n\n**Relevant sections cited**: Applicability table; Requirement 1–3; Compliance; Background (the AD’s stated reason)."},"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"}},"importantCases":[],"_links":{"self":"/api/acts/ad-cessna-206-55-horizontal-stabiliser-attachment-brackets-2","history":"/api/acts/ad-cessna-206-55-horizontal-stabiliser-attachment-brackets-2/history","analysis":"/api/acts/ad-cessna-206-55-horizontal-stabiliser-attachment-brackets-2/analysis","conflicts":"/api/acts/ad-cessna-206-55-horizontal-stabiliser-attachment-brackets-2/conflicts","importantCases":"/api/acts/ad-cessna-206-55-horizontal-stabiliser-attachment-brackets-2/important-cases","documents":"/api/acts/ad-cessna-206-55-horizontal-stabiliser-attachment-brackets-2/documents"}}