{"id":"F2013L01703","name":"AD/B737/18 Amdt 2 – Take-Off Warning","slug":"ad-b737-18-amdt-2-take-off-warning","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":127747,"registerId":"commonwealth-F2013L01703-current","compilationNumber":null,"startDate":"2026-04-03","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Boeing 737 Series Aeroplanes","sectionType":"division","heading":"Boeing 737 Series Aeroplanes","content":"### Boeing 737 Series Aeroplanes\n\n| AD/B737/18 Amdt 2 | Take-Off Warning | 19/2013 |\n| ----------------- | ---------------- | ------- |\n\n| Applicability: | All model 737 aircraft.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    |\n| -------------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement:   | Either:1. Action in accordance with FAA AD 88-22-09 Amdt 39-6054; or2. 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 737-SL-31-034 dated 31 May 1995.                                                                                                                                                                                                                                 |\n| Compliance:    | 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’.For 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.FAA Letter 98-103S-83 dated 18 Feb 1998 is approved for use as an alternative means of compliance (AMOC) with the requirements of this AD on all 737-600/-700/-800 airplanes. |\n|                | The effective date of this Amendment is 27 September 2013.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 |\n| Background:    | A significant number of take-off configuration warning systems were discovered to be inoperative during a one-time inspection of all Boeing 727 aircraft.Amendment 1 of this Airworthiness Directive introduced an alternate method of compliance, with an extension of the repetitive check period.                                                                                                                                                                                                                                                                       |\n\n|     | Amendment 2 of this Airworthiness Directive is issued to allow the use of an FAA AMOC for 737-600/-700/-800 airplanes. |\n| --- | ---------------------------------------------------------------------------------------------------------------------- |\n\n![](image.001.png)  \nPeter Nikolic  \nDelegate of the Civil Aviation Safety Authority\n\n11 September 2013","sortOrder":0},{"sectionNumber":"AD/B737/18 Amdt 2","sectionType":"part","heading":"AD/B737/18 Amdt 2","content":"## AD/B737/18 Amdt 2","sortOrder":1},{"sectionNumber":"Take-Off Warning","sectionType":"part","heading":"Take-Off Warning","content":"## Take-Off Warning","sortOrder":2},{"sectionNumber":"19/2013","sectionType":"part","heading":"19/2013","content":"## 19/2013","sortOrder":3}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":true,"description":"The original directive (from 1988) was a straightforward repetitive inspection requirement every 200 hours. Amendment 1 expanded the scope by adding an alternative compliance method with extended intervals (500 hours) for specific hardware configurations. Amendment 2 further expanded scope by adding a third pathway — an FAA-approved alternative compliance method — but restricted this new option to only the 737-600/-700/-800 sub-models. The directive has evolved from a simple universal requirement to a multi-track system with model-specific exceptions."},"complexity_factors":["Multiple compliance pathways (Requirement 1 vs Requirement 2) with different time intervals (200 hours vs 500 hours)","Specific part number reference (69-78214-1) creates conditional applicability","Cross-reference to external FAA directive (AD 88-22-09) and Boeing Service Letter (737-SL-31-034)","Reference to specific FAA AMOC letter (98-103S-83) limited to specific aircraft sub-models (-600/-700/-800)","Amendment structure requires understanding of what changed from previous versions (Amendment 1 extended intervals; Amendment 2 added AMOC option)","Technical aviation terminology (TOCWS, 'time in service', AMOC) requires domain knowledge"],"plain_english_summary":"This CASA Airworthiness Directive applies to all Boeing 737s in Australia and mandates regular checks of the Take‑off Configuration Warning System so pilots are warned of misconfigured takeoffs. Operators may comply via the older FAA AD (200‑hour checks) or, for aircraft with the specified warning module, by following Boeing service instructions with 500‑hour checks. Amendment 2 lets newer -600/-700/-800 series use an FAA‑approved alternative compliance method for added flexibility."},"flash_summary":{"complexity_score":4,"scope_assessment":{"changed":true,"description":"Amendment 2 does not expand which aeroplanes are covered (still all 737 models) but changes acceptable means of compliance by approving an FAA AMOC for 737-600/-700/-800 and formalises a Service Letter check for aircraft with a specified TOCWS module. In practical terms it broadens permitted compliance methods for certain models without removing the underlying inspection obligations; it also clarifies repeat intervals (200 hours under the FAA AD; 500 hours where the Service Letter method applies)."},"complexity_factors":["Cross-reference to an external FAA AD (Requirement 1) — compliance depends on following another jurisdiction's instrument (table 'Requirement').","Two mutually exclusive compliance routes with different intervals (200 hours vs 500 hours) — operators must choose and track the applicable schedule (table 'Compliance').","Part-number specific procedure: the Service Letter check applies only where TOCWS aural module P/N 69-78214-1 is installed (table 'Requirement').","AMOC approval limited to certain models: FAA Letter 98-103S-83 is authorised only for 737-600/-700/-800, creating model-dependent compliance options (table 'Compliance').","Wide applicability to 'All model 737 aircraft' but with model-specific alternatives — broad scope with localized exceptions (table 'Applicability' and 'Compliance').","Effective and historical compliance dates and staged intervals require operators to reconcile prior inspections and future scheduling (effective date and compliance timing notes)."],"plain_english_summary":"This amendment requires operators of Boeing 737 aeroplanes to either comply with the referenced FAA take‑off warning Airworthiness Directive or, if fitted with a specific TOCWS aural warning module (P/N 69‑78214‑1), perform recurring operational and functional checks under a Boeing Service Letter. It fixes inspection intervals (200 hours under the FAA method, 500 hours under the Service Letter method) and approves a specific FAA AMOC for 737‑600/‑700/‑800 models.\n\nAll Boeing 737 operators and maintenance organisations are affected: they must pick a compliance path, perform the checks at the stated intervals, and absorb the associated inspection and maintenance costs."},"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"}},"importantCases":[],"_links":{"self":"/api/acts/ad-b737-18-amdt-2-take-off-warning","history":"/api/acts/ad-b737-18-amdt-2-take-off-warning/history","analysis":"/api/acts/ad-b737-18-amdt-2-take-off-warning/analysis","conflicts":"/api/acts/ad-b737-18-amdt-2-take-off-warning/conflicts","importantCases":"/api/acts/ad-b737-18-amdt-2-take-off-warning/important-cases","documents":"/api/acts/ad-b737-18-amdt-2-take-off-warning/documents"}}