{"id":"F2008L03409","name":"AD/B737/338 Amdt 1 - Auxiliary Fuel Tanks","slug":"ad-b737-338-amdt-1-auxiliary-fuel-tanks","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":120416,"registerId":"commonwealth-F2008L03409-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/B737/338 Amdt 1 | Auxiliary Fuel Tanks | 10/2008 |\n| ------------------ | -------------------- | ------- |\n\n```html\n

Applicability:

Model 737 aeroplanes equipped with auxiliary fuel tanks installed in accordance with specified United States Federal Aviation Administration (FAA) Supplemental Type Certificates (STC) as follows:

Aeroplane Series

Auxiliary Tank STC

737-200

SA1082NW, SA2153WE and SA1054NW

737-400 and -500

SA3992NM and SA3980NM

Requirement:

Deactivate the auxiliary fuel tanks, in accordance with an approved deactivation procedure. Any auxiliary tank component that remains on the aeroplane must be secured and must have no effect on the continued operational safety and airworthiness of the aeroplane. Deactivation may not result in the need for additional instructions for continued airworthiness.

Note 1: Appendix A of this Directive provides criteria that should be included in the deactivation procedure.

Note 2: FAA AD 2008-12-03 Amdt 39-15546 refers.

Compliance:

On or before 16 December 2008.

This Amendment becomes effective on 25 September 2008.

Background:

This Directive requires deactivation of Rogerson Aircraft Corporation auxiliary fuel tanks. The Directive results from fuel system reviews conducted by the manufacturer, which identified potential unsafe conditions for which the manufacturer has not provided corrective actions and is issued to prevent the potential of ignition sources inside fuel tanks, which in combination with flammable fuel vapours, could result in fuel tank explosions and consequent loss of the aeroplane.

Amendment 1 is issued to correct a typographical error in the applicability.

\n```\n\n| | The original issue of this Directive became effective on 28 August 2008. |\n| --- | ------------------------------------------------------------------------ |\n\n![](image.001.png) \nJames Coyne \nDelegate of the Civil Aviation Safety Authority\n\n6 August 2008","sortOrder":0},{"sectionNumber":"AD/B737/338 Amdt 1","sectionType":"part","heading":"AD/B737/338 Amdt 1","content":"## AD/B737/338 Amdt 1","sortOrder":1},{"sectionNumber":"Auxiliary Fuel Tanks","sectionType":"part","heading":"Auxiliary Fuel Tanks","content":"## Auxiliary Fuel Tanks","sortOrder":2},{"sectionNumber":"10/2008","sectionType":"part","heading":"10/2008","content":"## 10/2008","sortOrder":3}],"analysis":{"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"Amendment 1 corrects a typographical error in the applicability and does not alter the substance or coverage of the Directive; the requirement to deactivate the specified auxiliary tanks by the stated compliance date remains unchanged (Amendment 1; Compliance)."},"complexity_factors":["Narrow applicability tied to specific aeroplane series and named FAA STCs (Applicability)","Operational requirement to use an \"approved deactivation procedure\"—introduces an approval step and administrative discretion (Requirement)","Technical/maintenance work: deactivation must secure any remaining components and not affect airworthiness (Requirement)","Restriction that deactivation may not create additional continued-airworthiness instructions (Requirement)","Fixed compliance date creates scheduling and operational impact (Compliance)","Cross-reference to an FAA airworthiness directive and STCs increases reliance on foreign certification materials (Note 2 / Applicability)","Amendment limited to correcting a typographical error in applicability (Amendment 1)"],"plain_english_summary":"This Directive requires owners/operators of certain Boeing 737-200, -400 and -500 aeroplanes fitted with Rogerson auxiliary fuel tanks installed under the listed FAA STCs to deactivate those tanks by an approved deactivation procedure, secure any remaining components, and ensure no effect on continued airworthiness (Applicability; Requirement; Compliance). CASA says the measure responds to manufacturer fuel-system reviews that identified potential ignition sources inside auxiliary tanks; Amendment 1 corrects a typographical error in the applicability and does not change the deactivation requirement (Background; Amendment 1)."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This amendment maintains the original scope. Amendment 1 explicitly states it only corrects a typographical error in the applicability section. The substantive safety requirement (deactivation of auxiliary fuel tanks) and the compliance deadline remain unchanged from the original August 2008 directive."},"complexity_factors":["Single, clear operational requirement (deactivate tanks)","Limited applicability table covering only 3 aircraft series and 5 specific STC numbers","No defined terms section or complex cross-referencing within the instrument","Only 2 brief notes referencing external guidance (Appendix A) and FAA AD 2008-12-03","Straightforward compliance deadline with no conditional exceptions or nested logic","Background explanation provided in plain language"],"plain_english_summary":"This AD orders deactivation of auxiliary fuel tanks installed under specific STCs on Boeing 737-200/-400/-500 series to eliminate an identified ignition-source risk that, with fuel vapour, could cause explosion and loss of the aircraft. Remaining tank hardware must be secured and deactivation follow an approved procedure. Amendment 1 corrects a model-number typo; the original AD took effect 28 Aug 2008 and this amendment 25 Sep 2008."},"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"}},"importantCases":[],"_links":{"self":"/api/acts/ad-b737-338-amdt-1-auxiliary-fuel-tanks","history":"/api/acts/ad-b737-338-amdt-1-auxiliary-fuel-tanks/history","analysis":"/api/acts/ad-b737-338-amdt-1-auxiliary-fuel-tanks/analysis","conflicts":"/api/acts/ad-b737-338-amdt-1-auxiliary-fuel-tanks/conflicts","importantCases":"/api/acts/ad-b737-338-amdt-1-auxiliary-fuel-tanks/important-cases","documents":"/api/acts/ad-b737-338-amdt-1-auxiliary-fuel-tanks/documents"}}