{"id":"F2007L04405","name":"AD/CAP 10/5 Amdt 1 - Front Tank Support Strap","slug":"ad-cap-10-5-amdt-1-front-tank-support-strap","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":70751,"registerId":"commonwealth-F2007L04405-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Avions Mudry Cap Series Aeroplanes","sectionType":"division","heading":"Avions Mudry Cap Series Aeroplanes","content":"### Avions Mudry Cap Series Aeroplanes\n\n| AD/CAP 10/5 Amdt 1 | Front Tank Support Strap | 1/2008 DM |\n| ------------------ | ------------------------ | --------- |\n\n| Applicability: | Model CAP 10B aircraft, all serial numbers.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  |\n| -------------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement:   | 1. For front fuel tank support strap, part number CAP10-70-08-01, reduce the life limit from 4,000 hours time in service to 2,000 hours time in service on the component history card, or equivalent record, and amend accordingly the operator’s maintenance programme to comply with this new airworthiness limitation. APEX Aircraft Service Bulletin No. 040102 Revision 1, or later EASA approved revision, refers.Note 1: In the event an operator is unable to establish the accumulated hours time in service on given fuel tank support strap installed on an aircraft, the total hours accumulated on the aircraft must be used in the determination of time for the support strap.2. For a tank support strap that has exceeded 2,000 hours time in service but has accumulated less than 2,500 hours time in service on the effective date of this Directive, replace the strap.3. For a tank support strap that has exceeded 2,500 hours time in service but has accumulated less than 4,000 hours time in service on the effective date of this Directive, replace the strap.Note 2: EASA AD 2007-0285 refers. |\n| Compliance:    | 1. Before further flight after 20 November 2007.2. Within 100 hours time in service or 6 months after 20 November 2007, whichever occurs first.3. Within 25 hours time in service or 1 month after 20 November 2007, whichever occurs first.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 |\n|                | This Amendment becomes effective on 20 November 2007.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        |\n| Background:    | A failure of a front fuel tank support strap occurred on a CAP 10B aircraft, and in response a life limit of 4,000 flight hours was imposed.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 |\n\n|     | Amendment 1 is issued in response to a new EASA AD, which was prompted by the discovery of a damaged front fuel tank support strap that had accumulated less than 4,000 hours time in service. This Directive reduces the life limit of the tank support straps to 2,000 hours time in service, in order to prevent fatigue cracks from occurring in the tank support straps before the established safe life is reached. |\n| --- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n\n![](image.001.png)  \nDavid Villiers  \nDelegate of the Civil Aviation Safety Authority\n\n20 November 2007","sortOrder":0},{"sectionNumber":"AD/CAP 10/5 Amdt 1","sectionType":"part","heading":"AD/CAP 10/5 Amdt 1","content":"## AD/CAP 10/5 Amdt 1","sortOrder":1},{"sectionNumber":"Front Tank Support Strap","sectionType":"part","heading":"Front Tank Support Strap","content":"## Front Tank Support Strap","sortOrder":2},{"sectionNumber":"1/2008 DM","sectionType":"part","heading":"1/2008 DM","content":"## 1/2008 DM","sortOrder":3}],"analysis":{"flash_summary":{"complexity_score":4,"scope_assessment":{"changed":true,"description":"The Directive narrows the component safe life: it reduces the front tank support strap life limit from 4,000 hours to 2,000 hours and adds mandatory replacement rules for straps between stated hour bands. This tightens the maintenance scope and creates immediate replacement and record-keeping obligations for all CAP 10B operators (Background; Requirement; Compliance)."},"complexity_factors":["Specific technical trigger: single component identified by part number (CAP10-70-08-01) increases technical precision needed.","Multiple replacement thresholds with different compliance windows (<=2,000; 2,000–2,500; 2,500–4,000) increases decision steps (Requirement & Compliance).","Immediate and short deadlines for compliance (before further flight; 25/100 hours or 1/6 months), producing operational urgency (Compliance).","Record-keeping rule for unknown strap hours requires using aircraft total hours, adding administrative judgment and potential conservatism (Requirement, Note 1).","Cross-references to external documents (APEX Service Bulletin, EASA AD 2007-0285) require consultation of other materials to implement fully (Requirement, Note 2).","Applies to all serial numbers of a model class — broad applicability but limited to one component reduces legal scope complexity while raising operational coverage."],"plain_english_summary":"This Directive shortens the approved safe life of the front fuel-tank support strap (part CAP10-70-08-01) on CAP 10B aeroplanes from 4,000 to 2,000 hours, requires operators to record the new limit and amend their maintenance programmes, and mandates strap replacement depending on the strap’s accumulated hours (with staged deadlines). It affects owners/operators of all CAP 10B serials, who must bear the record-keeping and replacement costs and comply within the stated timeframes (Requirement & Compliance)."},"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"},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This Airworthiness Directive maintains its original narrow scope. It addresses a specific safety-critical component (front fuel tank support strap) on a single aircraft model (CAP 10B). The amendment tightens an existing life limit based on new safety data, which is the standard purpose of such directives. There is no evidence of scope creep or expansion beyond the original safety intent."},"complexity_factors":["Single, specific aircraft model (CAP 10B) with narrow applicability","Only one mechanical component addressed (front fuel tank support strap)","Clear, numbered requirements with straightforward compliance deadlines","Minimal cross-referencing (only references one Service Bulletin and one EASA AD)","No nested definitions or interpretation sections","Simple conditional logic based solely on accumulated flight hours","Document is approximately 300 words excluding formatting artifacts"],"plain_english_summary":"This AD for Avions Mudry CAP 10B aircraft halves the mandatory replacement interval for the front fuel-tank retaining strap (from 4,000 to 2,000 flight hours) after a strap failure showed the old limit was unsafe. It forces earlier replacements for higher-hour straps, requires maintenance-programme and log updates, and affects all CAP 10B owners/operators. The aim is to prevent fatigue breaks that could let the tank shift or fail in flight."}},"importantCases":[],"_links":{"self":"/api/acts/ad-cap-10-5-amdt-1-front-tank-support-strap","history":"/api/acts/ad-cap-10-5-amdt-1-front-tank-support-strap/history","analysis":"/api/acts/ad-cap-10-5-amdt-1-front-tank-support-strap/analysis","conflicts":"/api/acts/ad-cap-10-5-amdt-1-front-tank-support-strap/conflicts","importantCases":"/api/acts/ad-cap-10-5-amdt-1-front-tank-support-strap/important-cases","documents":"/api/acts/ad-cap-10-5-amdt-1-front-tank-support-strap/documents"}}