{"id":"F2006B03370","name":"AD/B767/194 - Aft Pressure Bulkhead Radial Stiffener","slug":"ad-b767-194-aft-pressure-bulkhead-radial-stiffener","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":42833,"registerId":"commonwealth-F2006B03370-current","compilationNumber":null,"startDate":"2026-04-01","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"AIRWORTHINESS DIRECTIVE","sectionType":"part","heading":"AIRWORTHINESS DIRECTIVE","content":"# AIRWORTHINESS DIRECTIVE\n\n![](image.001.png)\n\nFor the reasons set out in the background section, the CASA delegate whose signature appears below issues the following Airworthiness Directive (AD) under subregulation 39.1 (1) of CASR 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 or aeronautical product 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\n![](image.001.png)  \n\nBoeing 767 Series Aeroplanes","sortOrder":0},{"sectionNumber":"AD/B767/194 Aft Pressure Bulkhead Radial","sectionType":"part","heading":"AD/B767/194 Aft Pressure Bulkhead Radial Stiffener 7/2004","content":"# AD/B767/194 Aft Pressure Bulkhead Radial Stiffener 7/2004\n\nApplicability: Model 767-300 series aircraft, line numbers 754, 761, 767, 775, and 776. Requirement: Action in accordance with the technical requirements of FAA AD 2004-08-07 Amdt\n\n39-13576.\n\nNote: Boeing Service Bulletins 767-53A0102 original issue, and Revision 1 refer.\n\nCompliance: Within 18 months after 8 July 2004.\n\nThis Airworthiness Directive becomes effective on 8 July 2004.\n\nBackground: The FAA requires certain actions in order to prevent interference of the A1 galley with the radial stiffener on the aft pressure bulkhead, which could result in fatigue crack propagation. Fatigue crack propagation could lead to possible rapid decompression of the aircraft or to damage and/or interference with the aircraft control systems that pass through the bulkhead, and consequent loss of control of the aircraft.\n\n![Signature of David Villiers, Delegate of the Civil Aviation Safety Authority.](image.002.png)  \n\nDavid Villiers\n\nDelegate of the Civil Aviation Safety Authority 26 May 2004\n\n![](image.001.png)  \n\nThe above AD is notified in the Commonwealth of Australia Gazette on 16 June 2004.","sortOrder":1}],"analysis":{"flash_summary":{"complexity_score":4,"scope_assessment":{"changed":false,"description":"The AD adopts the technical requirements of FAA AD 2004-08-07 for specified Boeing 767-300 line numbers and sets an 18-month compliance window effective 8 July 2004. The instrument, as provided, does not expand or narrow the FAA's stated applicability; it mirrors that foreign AD and references the relevant Boeing service bulletins."},"complexity_factors":["Cross-reference to FAA AD 2004-08-07: requires Australian operators to follow a foreign authority's technical requirements rather than containing self-standing technical instructions.","Reliance on manufacturer service bulletins (original and Revision 1): operators must obtain and follow those documents; revisions can affect compliance content.","Narrow applicability by line number (Model 767-300, line numbers 754, 761, 767, 775, 776): limits affected fleet but requires accurate tracking of individual airframe identity.","Technical, safety-critical engineering work (aft pressure bulkhead radial stiffener/fatigue inspection or modification): requires licensed maintenance/engineering resources and possible downtime.","Fixed compliance window (within 18 months after 8 July 2004): creates scheduling and operational cost pressure for affected operators.","Regulatory enforcement basis (issued under subregulation 39.1(1) of CASR 1998): non-compliance carries regulatory consequences.","Costs borne by aircraft owners/operators: the AD mandates action without funding or cost-allocation mechanisms in the instrument itself.","Potential for ambiguity if Boeing service bulletin revisions differ from the FAA AD text: implementation discretion may fall to maintainers/regulator to resolve minor inconsistencies."],"plain_english_summary":"*What it does:* Requires operators of specific Boeing 767-300 aircraft (line numbers 754, 761, 767, 775 and 776) to carry out the technical corrective actions specified in FAA AD 2004-08-07 and referenced Boeing service bulletins to address interference between the A1 galley and an aft pressure-bulkhead radial stiffener. Compliance must occur within 18 months of 8 July 2004.\n\n*Who it affects and why it matters:* Aircraft owners/operators must pay for and schedule the inspections/modifications; the AD aims to prevent fatigue cracking that could cause rapid decompression or damage to control systems."},"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 AD maintains its original narrow scope — it addresses a specific structural safety issue on five identified aircraft. There is no evidence of scope creep; the directive remains tightly focused on the aft pressure bulkhead radial stiffener issue as originally conceived."},"complexity_factors":["Very short document (under 300 words)","Only 5 specific aircraft affected (narrow applicability)","Single requirement: comply with external FAA directive","No defined terms section","No nested exceptions or conditional logic","Simple compliance deadline (single fixed timeframe)","Cross-reference to only one external technical document (FAA AD 2004-08-07)"],"plain_english_summary":"This AD requires owners/operators of five specific Boeing 767-300 aircraft to modify the A1 galley so it cannot interfere with the radial stiffener on the rear pressure bulkhead.  \n\nThe change (per FAA AD 2004-08-07 and Boeing SB 767-53A0102) prevents fatigue cracking that could cause rapid decompression, damage flight controls, or lead to loss of control; work due within 18 months of 8 July 2004."}},"importantCases":[],"_links":{"self":"/api/acts/ad-b767-194-aft-pressure-bulkhead-radial-stiffener","history":"/api/acts/ad-b767-194-aft-pressure-bulkhead-radial-stiffener/history","analysis":"/api/acts/ad-b767-194-aft-pressure-bulkhead-radial-stiffener/analysis","conflicts":"/api/acts/ad-b767-194-aft-pressure-bulkhead-radial-stiffener/conflicts","importantCases":"/api/acts/ad-b767-194-aft-pressure-bulkhead-radial-stiffener/important-cases","documents":"/api/acts/ad-b767-194-aft-pressure-bulkhead-radial-stiffener/documents"}}