{"id":"F2006B03382","name":"AD/B767/25 Amdt 1 - AlliedSignal I.P. Check Valves","slug":"ad-b767-25-amdt-1-alliedsignal-i-p-check-valves","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":42884,"registerId":"commonwealth-F2006B03382-current","compilationNumber":null,"startDate":"2026-04-01","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/B767/25 Amdt 1 - AlliedSignal I.P. Check Valves","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)  \n![](image.002.png)  \nBoeing 767 Series Aeroplanes\n\nAIRWORTHINESS DIRECTIVE\n\n![](image.002.png)\n\n![](image.002.png)  \nFor the reasons set out in the background section, the CASA delegate whose signature appears below revokes Airworthiness Directive (AD) AD/B767/25 and issues the following AD under subregulation 39.1 (1) of CAR 1998. The AD requires that the action set out in the requirement section (being action that the delegate considers necessary to correct the unsafe condition) be taken in relation to the aircraft mentioned in the applicability section: (a) in the circumstances mentioned in the requirement section; and (b) in accordance with the instructions set out in the requirement section; and (c) at the time mentioned in the compliance section.\n\nAD/B767/25\n\nAmdt 1\n\n  \nAlliedSignal I.P. Check Valves 3/2000\n\nApplicability: All Boeing 767 series aircraft with Allied Signal I.P. check valves, part number 3202164-2 or -4 installed.\n\nRequirement: Inspect applicable I.P. check valves in accordance with Boeing Alert Service Bulletin 767-36A0030 or 767-36A0030 Revision 1.\n\nNote: FAA AD 90-01-09 also refers.\n\nCompliance: Unless previously accomplished, at next “A” Check or within 250 flight hours of the effective date of this airworthiness directive, whichever occurs first.\n\nThis Amendment becomes effective on 23 March 2000.\n\nBackground: Failures of the engine I.P. check valve, which caused engine compressor stall, have been attributed to a manufacturing fault.\n\nThis amendment updates the AD and deletes the repetitive inspection required by the original issue of the directive.\n\nThe original issue of this Airworthiness Directive became effective on 10 August 1989.\n\n![Signature of Eugene Paul Holzapfel, Delegate of the Civil Aviation Safety Authority.](image.003.png)  \n\nEugene Paul Holzapfel\n\nDelegate of the Civil Aviation Safety Authority\n\n10 February 20000\n\n![](image.002.png)  \n\nThe above AD is notified in the Commonwealth of Australia Gazette on 23 February 2000.","sortOrder":0}],"analysis":{"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":true,"description":"This amendment revokes the original AD and updates its requirements by deleting the repetitive inspection previously mandated and replacing it with a one-time inspection requirement to be completed at the next “A” Check or within 250 flight hours. The effective date and removal of recurrent inspections narrow the ongoing scope of mandated checks while preserving an immediate corrective obligation (Background; Requirement; Compliance)."},"complexity_factors":["Narrow technical applicability — applies only to Boeing 767s with AlliedSignal I.P. check valves, P/N 3202164-2 or -4 (Applicability).","Requires adherence to an external technical document — inspection must follow Boeing Alert Service Bulletin 767-36A0030 or Revision 1 (Requirement).","Compliance timing tied to maintenance scheduling — at next “A” Check or within 250 flight hours (Compliance), which affects operational planning.","Amendment changes prior inspection regime by deleting repetitive inspections, altering ongoing maintenance burden (Background).","Reference to corresponding FAA AD (FAA AD 90-01-09) creates cross-jurisdictional alignment considerations (Note).","Regulatory discretion is limited — CASA delegate issues and sets the effective date but the directive prescribes the specific corrective action and timing."],"plain_english_summary":"This Airworthiness Directive requires operators of Boeing 767 aircraft fitted with AlliedSignal I.P. check valves (part numbers 3202164-2 or -4) to inspect those valves in accordance with Boeing Alert Service Bulletin 767-36A0030 (or Revision 1). The inspection must be done at the next scheduled “A” Check or within 250 flight hours.  \n\nCASA’s delegate issued the amendment to remove the prior repetitive-inspection requirement; aircraft operators must carry out and fund the inspection to address valve failures that have been linked to engine compressor stalls."},"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":2,"scope_assessment":{"changed":false,"description":"This amendment maintains the original scope (Boeing 767 aircraft with specific AlliedSignal valves). The only substantive change is procedural: removing the repetitive inspection requirement while keeping the initial inspection mandate. This is a refinement rather than scope expansion."},"complexity_factors":["Very short document (under 400 words)","Only 2 defined part numbers in the applicability section","Single requirement with clear reference to external Boeing document","Simple compliance condition: 'next A Check or 250 flight hours, whichever occurs first'","No nested exceptions or conditional logic","Clear linear structure: Applicability → Requirement → Compliance → Background","Only one cross-reference (to FAA AD 90-01-09, marked as a note rather than binding requirement)"],"plain_english_summary":"This safety notice for Boeing 767s replaces a 1989 directive and requires owners/operators to inspect AlliedSignal engine valves (P/N 3202164-2 or -4) at the next A check or within 250 flight hours. It addresses a manufacturing fault that can cause engine compressor stalls.\n\nUnlike the original rule, this amendment removes the requirement for indefinite repeated inspections—one inspection (unless already done) is now sufficient."}},"importantCases":[],"_links":{"self":"/api/acts/ad-b767-25-amdt-1-alliedsignal-i-p-check-valves","history":"/api/acts/ad-b767-25-amdt-1-alliedsignal-i-p-check-valves/history","analysis":"/api/acts/ad-b767-25-amdt-1-alliedsignal-i-p-check-valves/analysis","conflicts":"/api/acts/ad-b767-25-amdt-1-alliedsignal-i-p-check-valves/conflicts","importantCases":"/api/acts/ad-b767-25-amdt-1-alliedsignal-i-p-check-valves/important-cases","documents":"/api/acts/ad-b767-25-amdt-1-alliedsignal-i-p-check-valves/documents"}}