{"id":"F2008L03553","name":"AD/ERJ-170/17 - Aircraft Maintenance Plan","slug":"ad-erj-170-17-aircraft-maintenance-plan","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":120690,"registerId":"commonwealth-F2008L03553-current","compilationNumber":null,"startDate":"2026-04-03","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Embraer ERJ-170 Series Aeroplanes","sectionType":"division","heading":"Embraer ERJ-170 Series Aeroplanes","content":"### Embraer ERJ-170 Series Aeroplanes\n\n| AD/ERJ-170/17 | Aircraft Maintenance Plan | 11/2008 |\n| ------------- | ------------------------- | ------- |\n\n| Applicability: | Embraer ERJ 170-100 STD, ERJ 170-100 LR, ERJ 170-100 SU, ERJ 170-100 SE, ERJ 170-200 STD, ERJ 170-200 LR and ERJ 170-200 SU aircraft models.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   |\n| -------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |\n| Requirement:   | Alter the Maintenance Plan for the Embraer ERJ 170 aircraft, according with the following:1. Include tasks Nos. 27-11-03-003, 27-41-01-005 and 27-81-01-002; and2. Revise the interval of tasks Nos. 27-11-00-002 and 27-11-11-001, as shown at the Temporary Revision No. 1-3 to the MRBR, dated 15 December 2004.Alternative Means of ComplianceThe adoption of revision 2 to the MRBR for the Embraer ERJ 170 aircraft, or later approved revisions by the AGÊNCIA NACIONAL DE AVIAÇÃO CIVIL (ANAC), is considered as an alternate mean of compliance with this AD.Whenever there is a requirement for a maintenance action derived from the maintenance plan alteration described above to be accomplished in less than 700 flight hours after 20 April 2005, this action may be postponed to be accomplished within the next 700 flight hours after 20 April 2005.Note 1: ANAC AD 2005-03-02R1 dated 11 August 2008 refers.Note 2: ANAC AD 2005-03-02R1 supersedes AD 2005-03-02 which is listed in Table 1 of AD/ERJ-170/2. For the purposes of AD/ERJ-170/2, ANAC AD 2005-03-02 original issue is no longer applicable. |\n| Compliance:    | Within the next 30 calendar days after the effective date of this AD unless previously accomplished.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           |\n|                | This Airworthiness Directive becomes effective on 23 October 2008.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             |\n| Background:    | A review of the aileron and flap/slat flight controls systems safety assessment analysis of the Embraer ERJ 170 aircraft, conducted after type certification of the aircraft, has shown that certain assumptions used in the analysis of some dormant faults did not literally comply with the applicable safety assessment criteria. The persistence of those dormant faults, combined with other possible evident faults during a given flight, may lead to a significant reduction in safety margins.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       |\n\n|     | In addition, the incorporation of a new horizontal stabilizer actuator on the Embraer ERJ 170 aircraft fleet requires the implementation of new specific maintenance tasks. |\n| --- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n\n![](image.001.png)  \nJames Coyne  \nDelegate of the Civil Aviation Safety Authority\n\n25 August 2008","sortOrder":0},{"sectionNumber":"AD/ERJ-170/17","sectionType":"part","heading":"AD/ERJ-170/17","content":"## AD/ERJ-170/17","sortOrder":1},{"sectionNumber":"Aircraft Maintenance Plan","sectionType":"part","heading":"Aircraft Maintenance Plan","content":"## Aircraft Maintenance Plan","sortOrder":2},{"sectionNumber":"11/2008","sectionType":"part","heading":"11/2008","content":"## 11/2008","sortOrder":3}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"This AD maintains its original narrow scope — mandating specific maintenance plan updates for Embraer ERJ-170 aircraft based on post-certification safety analysis. It does not expand beyond its initial purpose of addressing flight control system safety assumptions and new actuator maintenance requirements."},"complexity_factors":["Single specific technical requirement with clear task references (27-11-03-003, etc.)","Contains one alternative compliance pathway (later ANAC-approved MRBR revision)","One conditional postponement provision for tasks due within specific flight hour window","Cross-reference to Brazilian aviation authority documentation (ANAC AD 2005-03-02R1)","Limited to specific aircraft models with clear applicability list","No nested definitions or extensive interpretation sections"],"plain_english_summary":"This AD requires Australian-registered owners/operators of certain Embraer ERJ-170-100/-200 aircraft to amend their maintenance plan: add three flight-control inspection tasks (ailerons, flaps/slats) and increase the frequency of two existing tasks. It responds to dormant flight-control faults and a new horizontal stabilizer actuator that could reduce safety margins if undetected.\n\nCompliance is required within 30 days; operators may instead adopt a later ANAC maintenance manual revision, and some tasks can be deferred until 700 flight hours after April 2005."},"flash_summary_failed":{"failed":true,"reason":"Unauthenticated. Configure AI_GATEWAY_API_KEY or use a provider module. Learn more: https://ai-sdk.dev/unauthenticated-ai-gateway","source":"analysis-cron"},"flash_summary":{"complexity_score":5,"scope_assessment":{"changed":true,"description":"This AD expands the aircraft Maintenance Plan obligations for the listed ERJ‑170 models by adding three maintenance tasks and changing intervals for two tasks (Requirement). It also formalises an alternate compliance route by recognising MRBR Revision 2 or later ANAC approvals and supersedes prior ANAC AD references (Requirement; Notes)."},"complexity_factors":["Technical specificity of mandated tasks and interval changes (Requirement: include tasks Nos. 27-11-03-003, 27-41-01-005, 27-81-01-002; revise intervals for 27-11-00-002 and 27-11-11-001).","Cross-reference to MRBR revisions and reliance on a later MRBR revision as an alternate means of compliance (Requirement: adoption of MRBR Revision 2 or later ANAC-approved revisions).","Short statutory compliance window (Compliance: within 30 calendar days after the AD effective date) creating administrative scheduling pressure.","Deferral rule tied to flight-hours threshold (Requirement: actions due in less than 700 flight hours after 20 April 2005 may be postponed up to the next 700 flight hours), which complicates tracking.","Applicability across multiple ERJ‑170 model variants increases fleet-wide implementation coordination.","Interplay with foreign regulator decisions and prior ADs (Notes referencing ANAC AD 2005-03-02R1 and supersession), requiring legal/records review to determine current obligations.","Operational impact arises from adding maintenance tasks and changing intervals (who pays: operators for implementation and scheduling)."],"plain_english_summary":"This Airworthiness Directive requires operators of Embraer ERJ‑170 variants to update their Maintenance Plan: add three specific tasks and change intervals for two existing tasks as set out in MRBR Temporary Revision No.1‑3. Operators must amend plans within 30 days; adopting MRBR Revision 2 (or later ANAC-approved revisions) is an alternative compliance path. The AD also permits limited postponement of actions that would otherwise be required within 700 flight hours after 20 April 2005."}},"importantCases":[],"_links":{"self":"/api/acts/ad-erj-170-17-aircraft-maintenance-plan","history":"/api/acts/ad-erj-170-17-aircraft-maintenance-plan/history","analysis":"/api/acts/ad-erj-170-17-aircraft-maintenance-plan/analysis","conflicts":"/api/acts/ad-erj-170-17-aircraft-maintenance-plan/conflicts","importantCases":"/api/acts/ad-erj-170-17-aircraft-maintenance-plan/important-cases","documents":"/api/acts/ad-erj-170-17-aircraft-maintenance-plan/documents"}}