{"id":"F2010L00891","name":"AD/A320/19 Amdt 1 - Hydraulic Fire Shut-Off Valve","slug":"ad-a320-19-amdt-1-hydraulic-fire-shut-off-valve","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":82850,"registerId":"commonwealth-F2010L00891-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/A320/19 Amdt 1 | Hydraulic Fire Shut-Off Valve | 8/2010 |\n| ----------------- | ----------------------------- | ------ |\n\n| Applicability: | Airbus A320, all models.                                                                                                                                                                                                                                                                                                                                                                                        |\n| -------------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement:   | Inspect and/or modify subject aeroplanes in accordance with French Airworthiness Directive (AD) 91-152-019 (B).                                                                                                                                                                                                                                                                                                 |\n|                | Note: French AD 91-152-019(B) refers to Airbus Industrie All Operators Telex Ref AOT 29-04 1 June 1991 Revision 1.                                                                                                                                                                                                                                                                                              |\n| Compliance:    | Remains unchanged as specified in the Requirement Document but with a revised effectivity date of 3 October 1991 for Australian registered aircraft.                                                                                                                                                                                                                                                            |\n|                | This Amendment becomes effective on 16 April 2010.                                                                                                                                                                                                                                                                                                                                                              |\n| Background:    | This Directive has been issued in order to prevent a possible internal short circuit of some suspect hydraulic fire shut-off valve actuators. The internal short circuit could lead to power supply circuit breaker popping out and in consequence the valve failing to close.This amendment corrects a reference error to the DGAC AD.The original issue of this Directive became effective on 3 October 1991. |\n\n![](image.001.png)\n\nMike Higgins  \nDelegate of the Civil Aviation Safety Authority\n\n8 April 2010","sortOrder":0},{"sectionNumber":"AD/A320/19 Amdt 1","sectionType":"part","heading":"AD/A320/19 Amdt 1","content":"## AD/A320/19 Amdt 1","sortOrder":1},{"sectionNumber":"Hydraulic Fire Shut-Off Valve","sectionType":"part","heading":"Hydraulic Fire Shut-Off Valve","content":"## Hydraulic Fire Shut-Off Valve","sortOrder":2},{"sectionNumber":"8/2010","sectionType":"part","heading":"8/2010","content":"## 8/2010","sortOrder":3}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This amendment maintains the original scope. It is purely administrative — correcting a citation error in the reference to the French airworthiness directive. The substantive safety requirement (inspect/modify hydraulic fire shut-off valves) and the compliance deadline remain identical to the 1991 original."},"complexity_factors":["Very short document (approximately 250 words)","Only 1 defined term implicitly used ('Applicability')","Single technical requirement referencing external documents rather than spelling out detailed procedures","No nested conditional logic or exceptions","Simple amendment structure — corrects one reference error without altering substantive requirements","Cross-references to external technical documents (French AD and Airbus AOT) but does not reproduce their content"],"plain_english_summary":"This CASA Airworthiness Directive requires Australian-registered Airbus A320 owners/operators and their maintenance organisations to inspect and modify hydraulic fire shut-off valve actuators to prevent an internal electrical short that could trip a circuit breaker and stop the valve closing during a fire. Amendment 1 merely corrects a cited reference in the original 1991 directive; the safety requirement and 3 Oct 1991 compliance date are unchanged (effective 16 Apr 2010)."},"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":3,"scope_assessment":{"changed":false,"description":"The amendment does not broaden the population of affected aircraft or add new types of obligations. It corrects a reference error to the DGAC AD and sets a clarified effectivity date for Australian-registered aircraft while leaving the original inspection/modify requirement under French AD 91-152-019(B) unchanged (Background; Requirement; Compliance)."},"complexity_factors":["Cross-reference to a foreign airworthiness directive and manufacturer telex (French AD 91-152-019(B); Airbus AOT 29-04) increases dependence on external documents (Requirement; Note).","Limited technical scope (hydraulic fire shut-off valve actuators) reduces breadth but requires specific maintenance actions and technical competence (Applicability; Requirement).","Amendment corrects a reference error and revises effectivity date for Australian aircraft, adding an administrative change without changing substantive obligations (Background; Compliance).","Compliance imposes operational costs: inspections/modifications and potential aircraft downtime borne by operators/maintenance organisations (Requirement).","Regulatory enforcement and effectivity are administered by CASA (signature/date), creating an implementation and oversight obligation for the regulator (Delegate of the Civil Aviation Safety Authority)."],"plain_english_summary":"This amendment requires inspection and, if necessary, modification of Airbus A320 series aeroplanes to address suspect hydraulic fire shut-off valve actuators by following French Airworthiness Directive 91‑152‑019(B) and Airbus All Operators Telex AOT 29‑04. It applies to Australian-registered A320s and their operators/maintenance organisations; the work is intended to prevent an internal short circuit that could trip a circuit breaker and cause the valve to fail to close."}},"importantCases":[],"_links":{"self":"/api/acts/ad-a320-19-amdt-1-hydraulic-fire-shut-off-valve","history":"/api/acts/ad-a320-19-amdt-1-hydraulic-fire-shut-off-valve/history","analysis":"/api/acts/ad-a320-19-amdt-1-hydraulic-fire-shut-off-valve/analysis","conflicts":"/api/acts/ad-a320-19-amdt-1-hydraulic-fire-shut-off-valve/conflicts","importantCases":"/api/acts/ad-a320-19-amdt-1-hydraulic-fire-shut-off-valve/important-cases","documents":"/api/acts/ad-a320-19-amdt-1-hydraulic-fire-shut-off-valve/documents"}}