{"id":"F2007L00476","name":"AD/SD3-30/49 - Engine and Landing Gear Control Cables","slug":"ad-sd3-30-49-engine-and-landing-gear-control-cables","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":63680,"registerId":"commonwealth-F2007L00476-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Short SD3-30 Series Aeroplanes","sectionType":"division","heading":"Short SD3-30 Series Aeroplanes","content":"### Short SD3-30 Series Aeroplanes\n\n| AD/SD3-30/49 | Engine and Landing Gear Control Cables | 4/2007 TX |\n| ------------ | -------------------------------------- | --------- |\n\n| Applicability: | Short Brothers PLC SD3-30 aeroplanes.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         |\n| -------------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement:   | 1. Inspect the affected cable assembly end fittings in accordance with Short Brothers PLC Service Bulletin (SB) SD330-76-A09 Revision 1 or later EASA approved revision.2. If no pitting/corrosion or cracking is found repeat the inspection detailed in Requirement 1 of this AD.3. If pitting/corrosion or cracking is found during inspection detailed in Requirement 1 or 2 of this AD, replace the affected cable assembly with a new cable assembly.4. Repeat the inspection of any new cable assembly end fittings in accordance with Short Brothers PLC SB SD360-76-A09 Revision 1or later EASA approved revision.Note: EASA Emergency AD 2007-0039-E dated 16 February 2007 refers. |\n| Compliance:    | 1. No later than 9 March 2007.2. Within 12 months of the original inspection and thereafter at intervals not to exceed 12 months.3. Before further flight after the effective date of this AD.4. After replacement at intervals not to exceed 15 years.                                                                                                                                                                                                                                                                                                                                                                                                                                       |\n|                | This Airworthiness Directive becomes effective on 23 February 2007.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           |\n\n| Background: | Following the identification of a failed propeller RPM cable end fitting and an LP fuel lever cable end fitting on an SD3 aircraft, several subsequent occurrences of control cable end fittings (type MS21260) with signs of pitting corrosion or cracking have been reported to Bombardier Shorts. All reported instances being identified during ground maintenance inspections on the SD3 fleet. Bombardier Shorts have performed examinations on the failed cable end fittings and established the root cause of failure as stress corrosion cracking of the SAE-AISI 303 stainless steel material they are manufactured from, initiated by pitting corrosion on the surface. The root cause of the stress corrosion is sustained tensile stress in a corrosive (warm, humid and salty) atmosphere.An analysis of the cable operated control systems installed on the SD3 aircraft types that use MS 21260 type end fittings has identified a number of potentially unsafe conditions due to a combination of failures that may result from this common mode cause. |\n| ----------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |\n\n![](image.001.png)  \nDavid Punshon  \nDelegate of the Civil Aviation Safety Authority\n\n20 February 2007","sortOrder":0},{"sectionNumber":"AD/SD3-30/49","sectionType":"part","heading":"AD/SD3-30/49","content":"## AD/SD3-30/49","sortOrder":1},{"sectionNumber":"Engine and Landing Gear Control Cables","sectionType":"part","heading":"Engine and Landing Gear Control Cables","content":"## Engine and Landing Gear Control Cables","sortOrder":2},{"sectionNumber":"4/2007 TX","sectionType":"part","heading":"4/2007 TX","content":"## 4/2007 TX","sortOrder":3}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This AD maintains its original narrow scope — addressing a specific safety defect in a specific aircraft type's control cable end fittings. There is no evidence of scope creep; it targets exactly the problem identified (MS21260 type end fittings on SD3-30 aircraft) and does not expand to unrelated systems or aircraft types."},"complexity_factors":["Single, specific aircraft type (Short SD3-30) with narrow applicability","Four sequential requirements with clear conditional logic (if/then)","Straightforward compliance dates and intervals","Only one technical reference to an external service bulletin (SB SD330-76-A09)","No nested definitions, interpretation sections, or cross-references to other legislation","Plain language background explanation included","Total length is approximately 300 words of substantive content"],"plain_english_summary":"This AD requires owners/operators of Short SD3-30 aeroplanes in Australia to inspect—and replace if cracked—certain engine and landing-gear control cable assemblies because stress corrosion cracking in cable end fittings can cause loss of engine control or gear. \n\nThe measure imposed an initial inspection by 9 March 2007, mandates replacement if damage is found, and requires recurring inspections (every 12 months if clean; new cables re-inspected every 15 years)."},"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":false,"description":"The instrument targets SD3‑30 aeroplanes using MS21260 end fittings and sets inspection/replacement obligations. It does not expand to other aircraft types or unrelated systems; it addresses the specific unsafe condition described in the Background and implements corresponding corrective actions (Applicability; Requirement; Background)."},"complexity_factors":["Technical cause: material-specific stress‑corrosion cracking (SAE‑AISI 303) requires targeted inspections.","Prescriptive recurring schedule: initial mandatory date, 12‑month repeat inspections, and up to 15‑year replacement interval (Compliance).","Immediate safety action: replacement before flight if damage is found increases urgency and logistic pressure on operators (Requirement 3).","Dependency on manufacturer service bulletin text and EASA‑approved revisions for inspection procedure (Requirement 1, 4).","Fleet applicability limited to Short SD3‑30 aircraft but affects multiple control systems using the same fitting type (Applicability; Background).","Compliance enforcement by CASA with a fixed effective date creates a short lead time for affected operators."],"plain_english_summary":"This Airworthiness Directive requires operators of Short Brothers SD3-30 aeroplanes to inspect specific engine and landing‑gear control cable end fittings (MS21260) for pitting, corrosion or cracking and to replace any affected cable assembly before further flight. CASA issued the AD after Bombardier Shorts identified stress‑corrosion cracking in SAE‑AISI 303 fittings. Operators pay for inspections and replacements; the regulator enforces deadlines (see Requirement; Compliance). The rule creates recurring maintenance tasks, inventory and scheduling costs, and relies on manufacturer service bulletins and EASA‑approved revisions."}},"importantCases":[],"_links":{"self":"/api/acts/ad-sd3-30-49-engine-and-landing-gear-control-cables","history":"/api/acts/ad-sd3-30-49-engine-and-landing-gear-control-cables/history","analysis":"/api/acts/ad-sd3-30-49-engine-and-landing-gear-control-cables/analysis","conflicts":"/api/acts/ad-sd3-30-49-engine-and-landing-gear-control-cables/conflicts","importantCases":"/api/acts/ad-sd3-30-49-engine-and-landing-gear-control-cables/important-cases","documents":"/api/acts/ad-sd3-30-49-engine-and-landing-gear-control-cables/documents"}}