{"id":"F2006B02628","name":"AD/B727/105 Amdt 1 - Take-Off Warning","slug":"ad-b727-105-amdt-1-take-off-warning","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":41944,"registerId":"commonwealth-F2006B02628-current","compilationNumber":null,"startDate":"2026-04-01","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/B727/105 Amdt 1 - Take-Off Warning","content":"---\nmeta-content-style-type: text/css\nmeta-content-type: application/xhtml+xml; charset=utf-8\nmeta-generator: Aspose.Words for .NET 22.10.0\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)  Boeing 727 Series Aeroplanes\n\n \n\n# AD/B727/105\n\nAmdt 1\n\nApplicability: All model 727 aircraft. Requirement:  Either:\n\n# Take-Off Warning 6/96\n\n1. Action in accordance with FAA AD 88-22-09 Amdt 39-6054; or\n\n\n \n\n2.    Where a Take-off Configuration Warning System (TOCWS) Aural Warning Module part number 69-78214-1 is installed on the aeroplane, perform an operational and functional check of the TOCWS in accordance with Boeing Service Letter 727-SL-31-009 dated 31 May 1995.\n\n \n\nCompliance:   For Requirement 1 - This compliance remains unchanged as `Within 200 hours time in service from 9 December 1988 and thereafter at intervals not exceeding 200 hours time in service'.\n\n \n\nFor Requirement 2 - Effective 23 May 1996, initially within 500 hours time in service from a check in accordance with Requirement 1 and thereafter at intervals not to exceed 500 hours time in service.\n\n \n\nBackground: A significant number of take-off configuration warning systems were discovered to be inoperative during a one-time inspection of all Boeing 727 aircraft. This amendment introduces an alternate method of compliance, with an extension of the repetitive check period.\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":{"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"This is an amendment to an existing Airworthiness Directive. The scope remains tightly focused on ensuring operational status of take-off configuration warning systems on Boeing 727 aircraft. The amendment introduces an alternative compliance method (Requirement 2) with extended inspection intervals, but this is a procedural refinement within the original safety purpose rather than scope creep."},"complexity_factors":["Short, single-purpose document (1 page)","Only 2 defined compliance pathways with clear 'either/or' structure","Minimal cross-referencing (only references to external FAA directive and Boeing Service Letter)","Simple temporal compliance structure (hours 'time in service')","No nested exceptions or conditional logic beyond the initial applicability and the two alternative requirements","Technical aviation terminology present but explained through context (TOCWS, part numbers)"],"plain_english_summary":"This CASA Airworthiness Directive mandates regular checks of the Boeing 727 Take‑off Configuration Warning System to ensure pilots are warned if the aircraft isn’t properly set for take‑off. It applies to all Boeing 727 operators in Australia and addresses widespread failures found in inspections.\n\nOperators may comply by following the referenced FAA inspection schedule or, for aircraft with the specified warning module, use Boeing’s service instructions with less frequent checks. The amendment adds that alternative compliance option."},"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"},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":true,"description":"The amendment introduces an alternate method of compliance limited to aeroplanes fitted with TOCWS Aural Warning Module P/N 69‑78214‑1 and extends the repetitive check interval for that alternate method to 500 hours (Requirement 2; Compliance). The original FAA‑AD compliance path and its 200‑hour interval remain unchanged (Requirement 1; Compliance). The Background records that many systems were found inoperative and frames the amendment as providing an alternate compliance option and interval extension."},"complexity_factors":["Multiple compliance paths: operators may comply by following FAA AD 88‑22‑09 (Requirement 1) or by performing the Boeing Service Letter check when the specific module P/N 69‑78214‑1 is fitted (Requirement 2) — requires decision and recordkeeping of chosen path.","Part‑number specificity: alternate method only applies if the TOCWS Aural Warning Module P/N 69‑78214‑1 is installed (Requirement 2) — operators must identify installed equipment accurately.","Different recurring intervals to track: 200‑hour interval remains for the FAA AD method; 500‑hour interval applies for the alternate method after an initial alignment with Requirement 1 (Compliance).","Cross‑reference reliance: compliance depends on FAA AD 88‑22‑09 and Boeing Service Letter 727‑SL‑31‑009, so operators must obtain and follow external documents (Requirement 1; Requirement 2).","Effective dates and sequencing: Requirement 1 timing unchanged from 9 Dec 1988; alternate method becomes effective 23 May 1996 with an initial 500‑hour interval measured from a check under Requirement 1 (Compliance).","Operational burden: the amendment alters inspection scheduling and maintenance planning across the operator fleet and creates a need to update maintenance programs and logs (Compliance; Background)."],"plain_english_summary":"This airworthiness directive covers all Boeing 727 aircraft and requires operators to ensure the take‑off configuration warning system is working. Operators must either follow FAA AD 88‑22‑09 or, if the aeroplane has Aural Warning Module P/N 69‑78214‑1, carry out operational checks per Boeing Service Letter 727‑SL‑31‑009. The AD fixes inspection routines and sets repeating intervals (200 hours for the FAA‑AD method; 500 hours for the alternate module check)."}},"importantCases":[],"_links":{"self":"/api/acts/ad-b727-105-amdt-1-take-off-warning","history":"/api/acts/ad-b727-105-amdt-1-take-off-warning/history","analysis":"/api/acts/ad-b727-105-amdt-1-take-off-warning/analysis","conflicts":"/api/acts/ad-b727-105-amdt-1-take-off-warning/conflicts","importantCases":"/api/acts/ad-b727-105-amdt-1-take-off-warning/important-cases","documents":"/api/acts/ad-b727-105-amdt-1-take-off-warning/documents"}}