{"id":"F2007L00753","name":"AD/A320/203 Amdt 1 - Forward Engine Mount Bolts","slug":"ad-a320-203-amdt-1-forward-engine-mount-bolts","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":64444,"registerId":"commonwealth-F2007L00753-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Airbus Industrie A319, A320 and A321 Ser","sectionType":"division","heading":"Airbus Industrie A319, A320 and A321 Series Aeroplanes","content":"### Airbus Industrie A319, A320 and A321 Series Aeroplanes\n\n| AD/A320/203 Amdt 1 | Forward Engine Mount Bolts | 4/2007 |\n| ------------------ | -------------------------- | ------ |\n\n| Applicability: | Model A318-111 and -112;Model A319-111, -112, -113, -114 and -115;Model A320-111, -211, -212, -214, -215 and -216; and,Model A321-111, -112, -211, -212, and -213 aircraft;All serial numbers, and which have CFM International CFM56-5A or CFM56-5B series engines installed.                                                                                                                                                                                                                                                   |\n| -------------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement:   | Action in accordance with the requirements of EASA Emergency AD 2007-0036R1.Note: Airbus All Operator Telex (AOT) A320-71A1042 Revision 01 and Goodrich All Operator Letter (AOL) CFM56-074 Revision 1, or later EASA approved revision, refer.                                                                                                                                                                                                                                                                                  |\n| Compliance:    | As specified in the Requirement document, with a revised effective date of21 February 2007.The compliance time remains unchanged by this issue of the Directive.                                                                                                                                                                                                                                                                                                                                                                 |\n|                | This Amendment becomes effective on 12 April 2007.                                                                                                                                                                                                                                                                                                                                                                                                                                                                               |\n| Background:    | From May 2006, the forward engine mount removal and installation procedures (AMM, ESM, QECKIM) have been undated to add removal and installation of the support assemblies. These updates have inadvertently introduced torque value errors for the bolts that attach the forward engine mount to the engine; and if applied, could result in rupture of bolts and failure of the support assembly due to overtorqued bolts, or reduced safe life of the secondary thrust load path due to low torque on monoball housing bolts. |\n\n|     | Amendment 1 is issued in response to a revision of the related EASA AD, which further clarifies that the paragraph (2) requirement is limited to aircraft on which erroneous maintenance data has been used to torque the forward engine mount bolts. |\n| --- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n\n![](image.001.png)  \nDavid Villiers  \nDelegate of the Civil Aviation Safety Authority\n\n1 March 2007","sortOrder":0},{"sectionNumber":"AD/A320/203 Amdt 1","sectionType":"part","heading":"AD/A320/203 Amdt 1","content":"## AD/A320/203 Amdt 1","sortOrder":1},{"sectionNumber":"Forward Engine Mount Bolts","sectionType":"part","heading":"Forward Engine Mount Bolts","content":"## Forward Engine Mount Bolts","sortOrder":2},{"sectionNumber":"4/2007","sectionType":"part","heading":"4/2007","content":"## 4/2007","sortOrder":3}],"analysis":{"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":true,"description":"Amendment 1 narrows the scope of the paragraph (2) requirement so it applies only to aircraft on which the erroneous maintenance data was actually used (see 'Amendment 1' paragraph). Other applicability, compliance times and the core Requirement remain as set by the referenced EASA AD and industry documents."},"complexity_factors":["Cross-reference to external mandatory documents (Requirement refers to EASA AD 2007-0036R1, Airbus AOT, Goodrich AOL) — operators must obtain and follow those texts.","Scope identification (Amendment 1) requires checking maintenance records to determine whether erroneous torque data was used for each aircraft.","Technical tasks (Background): inspection, torque verification, and potential bolt replacement or support assembly work involve certified maintenance actions and shop time.","Compliance/effective-date interplay (Compliance): revised effective date for the Requirement (21 Feb 2007) vs. amendment effective date (12 Apr 2007) creates a narrow administrative sequencing issue.","Reliance on approved revisions: Requirement allows later EASA‑approved revisions of referenced documents, introducing document-control and approval tracking for maintainers."],"plain_english_summary":"This airworthiness directive requires operators of Airbus A318/A319/A320/A321 aircraft with CFM56‑5A/5B engines to follow EASA Emergency AD 2007‑0036R1 (and related Airbus AOT A320‑71A1042 Rev 01 and Goodrich AOL CFM56‑074 Rev 1) to inspect and, if necessary, correct torque or replace forward engine‑mount bolts. CASA issued Amendment 1 to clarify that the rectification duty in paragraph (2) applies only to aircraft on which the erroneous maintenance data was used. Operators bear the inspection and repair costs; compliance timing is per the Requirement."},"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"},"kimi_summary":{"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"This Amendment 1 slightly narrows the scope compared to the original AD/A320/203 by limiting the paragraph (2) requirement to aircraft where erroneous maintenance data was actually used. This is a refinement rather than scope expansion."},"complexity_factors":["Short, single-purpose directive (approximately 300 words)","Only 4 defined/model categories in applicability table","Single cross-reference to EASA Emergency AD 2007-0036R1 (external document)","Simple conditional logic: compliance required only if erroneous maintenance data was used","No nested exceptions or sub-delegations","Technical but straightforward mechanical issue (torque values on bolts)"],"plain_english_summary":"This CASA Airworthiness Directive mandates inspections and corrective action on forward engine‑mount bolts of certain Airbus A318/A319/A320/A321 aircraft with CFM56‑5A/5B engines after incorrect maintenance torque values were identified. It’s required for affected operators and maintenance crews because improper bolt torque can lead to bolt failure, engine separation or structural damage. Amendment 1 limits full corrective action to aircraft where the wrong torque values were actually used, and follows the referenced EASA emergency directive."}},"importantCases":[],"_links":{"self":"/api/acts/ad-a320-203-amdt-1-forward-engine-mount-bolts","history":"/api/acts/ad-a320-203-amdt-1-forward-engine-mount-bolts/history","analysis":"/api/acts/ad-a320-203-amdt-1-forward-engine-mount-bolts/analysis","conflicts":"/api/acts/ad-a320-203-amdt-1-forward-engine-mount-bolts/conflicts","importantCases":"/api/acts/ad-a320-203-amdt-1-forward-engine-mount-bolts/important-cases","documents":"/api/acts/ad-a320-203-amdt-1-forward-engine-mount-bolts/documents"}}