{"id":"F2009L02786","name":"AD/GENERAL/82 Amdt 2 - Repair Assessment of Pressurised Fuselages","slug":"ad-general-82-amdt-2-repair-assessment-of-pressurised-fuselages","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":79974,"registerId":"commonwealth-F2009L02786-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Aircraft - General","sectionType":"division","heading":"Aircraft - General","content":"### Aircraft - General\n\n| AD/GENERAL/82 Amdt 2 | Repair Assessment ofPressurised Fuselages | 8/2009 |\n| -------------------- | ----------------------------------------- | ------ |\n\n| Applicability: | Transport Category aircraft listed in the Requirement document. |\n| -------------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement: | Incorporate repair assessment guidelines for the fuselage pressure boundary into the CASA approved System of Maintenance for the aircraft in accordance with Federal Aviation Administration 14 CFR Part 121.1107 (a).Note 1: References made in the Requirement document text to “FAA approval of repair assessment guidelines”, shall be read as “CASA approval of repair assessment guidelines”.Note 2: FAA Advisory Circular AC 120-73 is available to provide guidance for operators of affected aircraft. |\n| Compliance: | Before the applicable flight cycle implementation time and date specified in the Requirement document. |\n| | This Amendment becomes effective on 30 July 2009. |\n| Background: | This Directive is the result of FAA concern for the continued operational safety of aircraft that are approaching or have exceeded their design service goal. The purpose of the repair assessment guidelines is to establish a damage-tolerance based supplemental inspection program for repairs to detect damage, which may develop in a repaired area, before that damage degrades the load carrying capability of the structure below the levels required by the applicable airworthiness standards. The DGAC has mandated similar requirements for applicable French aircraft.Amendment 1 updated the requirement document and the notes to reference US Federal Aviation Regulation 121.370 and the associated Advisory Circular AC120-73. Reference to “repair assessment programs” is changed to “repair assessment guidelines” to be consistent with the requirement document. The compliance is altered to remove the date, which is now specified in the requirement document. The original issue of this Airworthiness Directive became effective on10 August 2000.Amendment 2 updates the reference to the requirement document. |\n\n| | FAR Part 121.307(a) is now FAR Part 121.1107 (a). |\n| --- | ------------------------------------------------- |\n\n![](image.001.png) \nDavid Villiers \nDelegate of the Civil Aviation Safety Authority\n\n17 June 2009","sortOrder":0},{"sectionNumber":"AD/GENERAL/82 Amdt 2","sectionType":"part","heading":"AD/GENERAL/82 Amdt 2","content":"## AD/GENERAL/82 Amdt 2","sortOrder":1},{"sectionNumber":"Repair Assessment ofPressurised Fuselage","sectionType":"part","heading":"Repair Assessment ofPressurised Fuselages","content":"## Repair Assessment of \nPressurised Fuselages","sortOrder":2},{"sectionNumber":"8/2009","sectionType":"part","heading":"8/2009","content":"## 8/2009","sortOrder":3}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"This amendment maintains the original scope precisely. Amendment 2 is purely technical — it updates a single regulatory reference number (FAR Part 121.307(a) to 121.1107(a)) to match US FAA renumbering. The substantive safety requirements, applicability, and intent remain unchanged from the 2000 original and Amendment 1."},"complexity_factors":["Short, single-purpose directive (approximately 400 words)","Only 2 defined terms effectively ('Requirement document' and 'FAA/CASA approval' substitution)","Minimal conditional logic — single applicability criterion (transport category aircraft in listed document)","One cross-reference to external US regulation (14 CFR Part 121.1107) and advisory circular","No nested exceptions or complex procedural hierarchies","Amendment structure is straightforward — tracks changes from previous versions clearly in Background section"],"plain_english_summary":"This Airworthiness Directive mandates that operators of listed transport‑category aircraft add damage‑tolerance inspection requirements for repaired pressurised fuselage areas to their CASA‑approved maintenance programs. It forces airlines and maintenance organisations to adopt FAA‑based repair assessment guidelines so hidden fatigue or crack growth in repaired fuselages is detected before becoming hazardous. Amendment 2 merely updates an FAA regulatory reference number."},"flash_summary":{"complexity_score":4,"scope_assessment":{"changed":false,"description":"Amendment 2 updates references and the Requirement document citation (and corrects the cross‑reference to the current FAA Part number). It does not broaden the substantive reach of the AD: the core obligation — incorporate repair assessment guidelines for fuselage pressure boundaries into a CASA‑approved System of Maintenance — remains unchanged. Earlier Amendment 1 altered wording from \"programs\" to \"guidelines\" and moved the compliance date into the Requirement document, which changed presentation but not the underlying regulatory obligation. Overall, the AD’s scope has been clarified and its references updated rather than materially expanded beyond its original safety‑focused purpose."},"complexity_factors":["Short instrument that delegates substantive detail to an external Requirement document (creates an external dependency)","Cross‑references to foreign regulation and guidance (FAA 14 CFR Part 121.1107(a) and AC 120‑73) with instruction to read \"FAA approval\" as \"CASA approval\"","Few provisions in the AD itself — applicability, requirement to incorporate guidelines, and compliance timing — but those rely on external documents for aircraft lists and dates","Amendment history and corrected regulatory citations (e.g. FAR Part 121.307(a) → 121.1107(a)) add interpretive steps for users checking precedent","One conditional application (only to aircraft listed in Requirement document) rather than a broad rule; compliance date is variable (in Requirement document) rather than fixed in the AD"],"plain_english_summary":"**What this instrument does (mechanics)**\n\n- Requires operators of certain transport‑category aircraft (those listed in the separate Requirement document) to add repair assessment guidelines for the fuselage pressure boundary into their CASA‑approved System of Maintenance (SoM). This must be done in accordance with the approach in FAA 14 CFR Part 121.1107(a), with FAA Advisory Circular AC 120‑73 provided as guidance. (Requirement; Compliance.)\n\n- The AD substitutes CASA approval where the Requirement document or referenced FAA material says \"FAA approval\" — i.e. the operator must obtain CASA approval of the repair assessment guidelines. (Note 1.)\n\n- The exact aircraft affected and the deadline for compliance are set out in the Requirement document referenced by the AD; the AD itself does not list the individual serial numbers or dates. The Amendment becomes effective 30 July 2009. (Applicability; Compliance.)\n\n**Who this affects**\n\n- Airline and other commercial operators of transport‑category aircraft that are listed in the Requirement document. These are operators of pressurised fuselage aircraft for which the Requirement document applies.\n\n- Organisations responsible for the aircraft System of Maintenance (the operator’s maintenance organisation) and CASA (which must approve the added guidelines).\n\n**Why it matters (stated purpose and how it operates)**\n\n- The AD’s stated purpose is to ensure continued operational safety of aircraft approaching or exceeding their design service goal by establishing damage‑tolerance based repair assessment guidelines. The guidelines are intended to create supplemental inspection regimes for repaired fuselage pressure boundaries so that any damage that develops in a repaired area is detected before structural strength falls below required levels. (Background.)\n\n**Practical effects, incentives and trade‑offs**\n\n- Who pays: the operator pays. Costs include producing the repair assessment guidelines (or adapting FAA guidance), securing CASA approval, extra inspections, possible repair work, downtime while inspections/repairs occur, training for maintenance staff, and record‑keeping. (Requirement; Compliance.)\n\n- Who decides: CASA approves the specific repair assessment guidelines inserted into each operator’s SoM; the operator drafts and implements them. The Requirement document and CASA exercise regulatory control over both content and timing. (Requirement; Note 1.)\n\n- Behavioural change required: operators must incorporate and follow damage‑tolerance repair assessment procedures in their approved maintenance system. That reduces operators’ freedom to omit such inspections or to use wholly different approaches without CASA approval.\n\n- Benefits vs costs and trade‑offs: the stated benefit is earlier detection of repair‑related damage and preservation of fuselage load‑carrying capability; the direct cost is increased maintenance effort and possible operational disruption. The net value depends on the condition and age of each fleet, the frequency of inspections required, and repair outcomes. (Background.)\n\n- Implementation and compliance risk: the AD delegates substantive detail to an external Requirement document and to FAA regulation/AC guidance. That introduces dependence on alignment between CASA and FAA material and on timely, clear Requirement documentation. Operators must manage obtaining CASA approval and ensuring their SoM changes are implemented by the compliance date(s) specified in the Requirement document. (Applicability; Requirement; Compliance.)\n\n**Other practical notes**\n\n- This AD updates prior versions chiefly to correct cross‑references (for example FAR/Part numbering) and to use the phrase \"repair assessment guidelines\" consistently; it does not itself list aircraft or compliance dates — those details live in the Requirement document referenced by the AD. (Background; Amendments.)\n\n- Guidance: FAA Advisory Circular AC 120‑73 is cited as a source of guidance for operators; CASA approval replaces FAA approval in the Australian context. (Note 2; Note 1.)\n\n\n(Sections relied on: Applicability; Requirement; Compliance; Background; Notes.)"},"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-general-82-amdt-2-repair-assessment-of-pressurised-fuselages","history":"/api/acts/ad-general-82-amdt-2-repair-assessment-of-pressurised-fuselages/history","analysis":"/api/acts/ad-general-82-amdt-2-repair-assessment-of-pressurised-fuselages/analysis","conflicts":"/api/acts/ad-general-82-amdt-2-repair-assessment-of-pressurised-fuselages/conflicts","importantCases":"/api/acts/ad-general-82-amdt-2-repair-assessment-of-pressurised-fuselages/important-cases","documents":"/api/acts/ad-general-82-amdt-2-repair-assessment-of-pressurised-fuselages/documents"}}