{"id":"F2006B10834","name":"AD/INST/31 - Airborne Vacuum Pumps - Removal from Service","slug":"ad-inst-31-airborne-vacuum-pumps-removal-from-service","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":56313,"registerId":"commonwealth-F2006B10834-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/INST/31 - Airborne Vacuum Pumps - Removal from Service","content":"COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 \\- 107 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n![](image.001.png)  \nInstruments and Automatic Pilots\n\nAD/INST/31 Airborne Vacuum Pumps \\- Removal from Service 3/86\n\nApplicability: AIRBORNE PART NUMBER SERIAL NUMBERS\n\nDry Air Pumps\n\n214CC-13 10AA30 to 10AA36 and 10AA38\n\n242CW 10AA281 to 10AA293\n\n441CC 9AA260 to 9AA288 9AA291, 9AA294,\n\n9AA295\n\n441CC-7 9AA929 to 9AA-949 9AA953, 9AA954\n\n9AA956, 9AA957, 9AA959\n\n442CW 9AA850 to 9AA875 9AA880 to 9AA886,\n\n9AA888 to 9AA903, 9AA905 to 9AA921,\n\n9AA928, 9AA934, 9AA936 9AA939, 9AA940,\n\n9AA945 to 9AA952, 9AA955 to 9AA958,\n\n9AA962 to 9AA967\n\n442CW-4 10AA173 to 10AA179 10AA182 to 10AA199\n\n10AA201, 10AA202\n\n442CW-12 10AA356, 10AA357, 10AA386, 10AA389\n\nAuxiliary Dry Air Pumps\n\n4A2-1 9AA44 to 9AA46\n\n4A3-1 9AA56, 9AA59 to 9AA66, 9AA73, 9AA79 to\n\n9AA82 10AA83 to 10AA88, 10AA90 to\n\n10AA94, 10AA96, 10AA114, 10AA126,\n\n10AA130, 10AA131, 10AA132, 10AA138,\n\n10AA150, 10AA154, 10AA155, 10AA159,\n\n10AA161\n\nThe above listed pumps were not available for installation before 1 September 1985\\. Therefore, new Airborne Dry Air Pumps or Auxiliary Dry Air Pumps installed prior to that date are exempt from this AD. Pumps that have been reworked by Airborne will have a white date code stamped on the pump housing near the discharge port.\n\nThis will indicate that the pump complies with this directive.\n\nRequirement: Replace any of the above mentioned Dry Air Pumps in service ensuring that the replacement has been reworked as applicable.\n\nNote: FAA AD 86-01-06 and Airborne Service Letter No 30 refer.\n\nCompliance: Prior to the issue of the next Maintenance Release after 31 March 1986.\n\nCOMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 \\- 107 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\nBackground: The drive shafts of listed pumps may not have been correctly brazed during manufacture, and could therefore have a very short operational life.","sortOrder":0}],"analysis":{"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":"Scope remains limited to the listed Airborne pump part numbers/serials and to replacement or installation of reworked units (white date code) or units installed before 1 Sept 1985. The directive operates as a targeted corrective action rather than expanding obligations beyond the identified pumps."},"complexity_factors":["Narrow, catalogue-style applicability: long lists of specific part numbers and serial-number ranges increase administrative effort to check applicability.","Exemption window: separate rule for pumps installed before 1 September 1985 requires verifying installation dates.","Rework identification: requires physical inspection for a white date code to confirm compliant rework.","Fixed compliance trigger: deadline tied to next 'Maintenance Release' after 31 March 1986, creating scheduling coordination for operators and maintenance providers.","Supply/availability risk: affected operators must source reworked replacements or have pumps reworked by Airborne, creating procurement and lead-time considerations.","Cross-reference to FAA AD and manufacturer service letter requires checks of external documents for technical detail."],"plain_english_summary":"**AD/INST/31** requires operators to remove and replace specific Airborne dry-air and auxiliary vacuum pumps whose drive shafts may have been incorrectly brazed. Affected parties are aircraft owners/operators and maintenance organisations: they must install pumps that have been reworked (identified by a white date code) or replace listed units before the next Maintenance Release after 31 March 1986. The rule aims to prevent premature pump failure; compliance imposes inspection, parts and labour costs and a need to source reworked replacements."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This Airworthiness Directive maintains its original narrow, technical scope. It addresses a specific manufacturing defect in specific pump models and requires their replacement. There is no evidence of scope creep; the directive remains tightly focused on the original safety issue identified in 1986."},"complexity_factors":["Single, specific technical requirement (replacement of listed parts)","Limited applicability defined by explicit part and serial number lists (no conditional logic or interpretation required)","One clear exemption based on a simple date threshold (pre-1 September 1985)","No defined terms section or cross-references to other legislation (only references to related FAA directive and manufacturer service letter as background)","Straightforward compliance deadline (prior to next Maintenance Release after fixed date)","Total length is approximately one page with tabular data being the bulk of content"],"plain_english_summary":"This CASA safety order requires removal and replacement of certain Airborne dry air/vacuum pumps listed by part/serial number because improperly brazed drive shafts can fail suddenly. It affects aircraft owners, operators and maintenance organisations that have the specified pumps installed.\n\nThe rule matters because these pumps drive essential flight instruments; sudden failure can cause instrument loss or misleading indications. Affected pumps must be replaced before the next scheduled maintenance check after 31 March 1986; units installed before 1 Sept 1985 are exempt and reworked pumps bear a white date stamp."}},"importantCases":[],"_links":{"self":"/api/acts/ad-inst-31-airborne-vacuum-pumps-removal-from-service","history":"/api/acts/ad-inst-31-airborne-vacuum-pumps-removal-from-service/history","analysis":"/api/acts/ad-inst-31-airborne-vacuum-pumps-removal-from-service/analysis","conflicts":"/api/acts/ad-inst-31-airborne-vacuum-pumps-removal-from-service/conflicts","importantCases":"/api/acts/ad-inst-31-airborne-vacuum-pumps-removal-from-service/important-cases","documents":"/api/acts/ad-inst-31-airborne-vacuum-pumps-removal-from-service/documents"}}