{"id":"F2006B01967","name":"AD/A320/78 - Spoiler Phased Lift Dumping","slug":"ad-a320-78-spoiler-phased-lift-dumping","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":41189,"registerId":"commonwealth-F2006B01967-current","compilationNumber":null,"startDate":"2026-04-01","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/A320/78 - Spoiler Phased Lift Dumping","content":"COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 \\- 105 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n![](image.001.png)  \nAirbus Industrie A319, A320 and A321 Series Aeroplanes\n\nAD/A320/78 Spoiler Phased Lift Dumping 2/97\n\nApplicability: All model A320-111, A320-211 A320-212, A320-231, A320-232, A321-111,\n\nA321-112 and A321-131 without Airbus Industrie modification 24745 or Airbus Industrie Service Bulletins A320-27-1088 dated 16 January 1995, Revision 1 dated 16\n\nMay 1995 or Revision 2 dated 11 September 1995 incorporated.\n\nRequirement: Unless previously accomplished, modify the aeroplane in accordance with Airbus Industrie Service Bulletins A320-27-1088 dated 16 January 1995, Revision 1 dated 16 May 1995 or Revision 2 dated 11 September 1995 to activate the “phased lift dumping” function of the spoiler elevator computer.\n\nNote: DGAC AD 96-169-081(B) refers.\n\nCompliance: Prior to 30 September 1997.\n\nThis Airworthiness Directive becomes effective on 30 January 1997.\n\nBackground: This Directive mandates measures designed to reduce the delay in activation of automatic deceleration means during landing with strong cross winds and/or on contaminated runways.","sortOrder":0}],"analysis":{"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The directive’s scope matches its stated safety objective: it compels activation of the phased lift-dumping function on named aircraft not already modified, to reduce delay in automatic deceleration during certain landing conditions. The scope is limited to specified model variants and to aircraft without the listed modification/service-bulletin already incorporated; no expansion beyond that set is introduced in the text."},"complexity_factors":["Targeted applicability to specific A319/A320/A321 model variants and only those without prior incorporation of modification 24745 or SB A320-27-1088 (Applicability).","Mandated technical modification to the spoiler/elevator computer to activate a function (Requirement) — a safety-critical, systems-level change.","Obligation to follow specific revisions of an Airbus Service Bulletin (Requirement) which creates dependency on manufacturer documentation and version control.","Hard compliance deadline (Prior to 30 September 1997) that concentrates scheduling and maintenance burden on operators (Compliance).","Regulatory linkage to a foreign authority AD (DGAC AD 96-169-081(B)) which can affect coordination and acceptance across jurisdictions (Note).","Limited discretion for operators: either incorporate the specified modification or remain non-compliant; no alternative means of compliance are provided in the text (Requirement/Compliance)."],"plain_english_summary":"This directive requires operators of specific Airbus A319/A320/A321 variants that have not already had Airbus modification 24745 or Service Bulletin A320-27-1088 incorporated to modify the spoiler/elevator computer so the “phased lift dumping” function is activated, by implementing the listed Airbus Service Bulletin. Operators must arrange and fund the modification and complete it by 30 September 1997. The change is intended to speed activation of automatic deceleration systems during landings with strong crosswinds or on contaminated runways (Background)."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, time-bound airworthiness directive with a narrow, specific safety purpose. It has not expanded beyond its original intent of mandating a specific spoiler system modification for crosswind/contaminated runway safety."},"complexity_factors":["Single, specific technical requirement with clear alternative compliance paths (three acceptable bulletin versions)","Limited applicability scope (8 specific aircraft models, with explicit exclusions for already-modified aircraft)","No nested conditional logic or cross-references to other legislation beyond a single note referencing a French aviation authority directive","Straightforward compliance deadline with no phased or graduated requirements","Short document (under 200 words) with minimal defined terms"],"plain_english_summary":"This order requires owners/operators of certain Airbus A320/A321 aircraft in Australia to install a software or hardware update that enables \"phased lift dumping\" so spoilers deploy in a smarter sequence at touchdown, improving automatic braking activation.\n\nIt matters because without it delayed deceleration in strong crosswinds or on wet/icy runways can lead to runway excursions. It applies to affected aircraft that haven’t already had the specified modification or service bulletin installed; compliance was due 30 September 1997."}},"importantCases":[],"_links":{"self":"/api/acts/ad-a320-78-spoiler-phased-lift-dumping","history":"/api/acts/ad-a320-78-spoiler-phased-lift-dumping/history","analysis":"/api/acts/ad-a320-78-spoiler-phased-lift-dumping/analysis","conflicts":"/api/acts/ad-a320-78-spoiler-phased-lift-dumping/conflicts","importantCases":"/api/acts/ad-a320-78-spoiler-phased-lift-dumping/important-cases","documents":"/api/acts/ad-a320-78-spoiler-phased-lift-dumping/documents"}}