{"id":"F2006B01952","name":"AD/A320/64 - Avionics Hatch 231 AF.","slug":"ad-a320-64-avionics-hatch-231-af","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":41174,"registerId":"commonwealth-F2006B01952-current","compilationNumber":null,"startDate":"2026-04-01","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/A320/64 - Avionics Hatch 231 AF.","content":"---\nmeta-content-style-type: text/css\nmeta-content-type: application/xhtml+xml; charset=utf-8\nmeta-description: CASA Airworthiness Directive\nmeta-generator: Aspose.Words for .NET 22.10.0\nmeta-keywords: Issue 4/1996,Aircraft above 5700 kg,Airbus Industrie A319, A320 and A321 Series Aeroplanes,Avionics Hatch 231 AF.,64\ntitle: Airworthiness Directive - AD/A320/64 - Avionics Hatch 231 AF.\n---\n\n?xml version=\"1.0\" encoding=\"utf-8\" standalone=\"no\"?>\n\nCOMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n \n\n![](image.001.png)  Airbus Industrie A319, A320 and A321 Series Aeroplanes\n\n \n\nAD/A320/64 Avionics Hatch 231 AF. 4/96\n\nApplicability: All models without modifications 22119 or 21999 embodied, or SB A320-53-1070 incorporated.\n\n \n\nRequirement: Action in accordance with Airbus Industrie SB A320-53-1070.\n\n \n\nNote: DGAC AD 96-011-075(B) refers.\n\n \n\nCompliance: Prior to 30 September 1997.\n\n \n\nBackground:  This Directive is issued to prevent spilled liquids entering the avionics compartment via the hatch seal.\n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1601},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"The directive maintains its original narrow technical scope addressing only the specific safety risk of liquid ingress through Hatch 231 AF. It remains a targeted airworthiness requirement without expansion into broader operational or maintenance areas."},"complexity_factors":["Extremely short length (approximately 100 words of substantive content)","Single external technical reference (Airbus Service Bulletin A320-53-1070) containing actual procedure details","Simple binary applicability test (presence or absence of two specific modifications)","Single unconditional compliance requirement with no exceptions or alternative methods stated","Zero defined terms within the directive text itself"],"plain_english_summary":"**What this does:** This is a mandatory safety order requiring operators of specific Airbus aircraft to fix a seal on an electronics compartment hatch to prevent liquid damage.\n\n**Who it affects:** Owners and operators of Airbus A319, A320, and A321 aircraft **unless** they have already installed modifications 22119 or 21999, or already complied with Airbus Service Bulletin A320-53-1070.\n\n**What must be done:** Carry out the inspection and modification instructions contained in Airbus Service Bulletin A320-53-1070 for Hatch 231 AF (an access panel in the avionics bay).\n\n**Why it matters:** Without this fix, spilled liquids—such as drinks in the cockpit—could leak through the hatch seal and destroy critical flight computers stored in the avionics compartment below, potentially causing loss of navigation or control systems."}},"importantCases":[],"_links":{"self":"/api/acts/ad-a320-64-avionics-hatch-231-af","history":"/api/acts/ad-a320-64-avionics-hatch-231-af/history","analysis":"/api/acts/ad-a320-64-avionics-hatch-231-af/analysis","conflicts":"/api/acts/ad-a320-64-avionics-hatch-231-af/conflicts","importantCases":"/api/acts/ad-a320-64-avionics-hatch-231-af/important-cases","documents":"/api/acts/ad-a320-64-avionics-hatch-231-af/documents"}}