{"id":"F2006B09701","name":"AD/F27/134 Amdt 1 - Main Wing Tank and Collector Tank Fuel Line","slug":"ad-f27-134-amdt-1-main-wing-tank-and-collector-tank-fuel-line","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":115864,"registerId":"commonwealth-F2006B09701-current","compilationNumber":null,"startDate":"2026-04-03","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/F27/134 Amdt 1 - Main Wing Tank and Collector Tank Fuel Line","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)  Fokker F27 Series Aeroplanes\n\n \n\nAD/F27/134\n\nAmdt 1\n\n\nMain Wing Tank and Collector Tank Fuel Line 1/93\n\n \n\nApplicability: Fokker F27 aircraft (except Mk 050), all Serial Numbers.\n\n \n\nRequirement: Action in accordance with the technical requirements of the Netherlands Directive BLA 92-102 Issue 2 dated 23 October 1992.\n\n \n\nNote: Fokker Service Bulletin F27/28-61 dated 3 September 1992 refers.\n\nCompliance: As specified in the Requirement Document with an effective date of 7 January 1993. Background:               This amendment is raised to incorporate Issue 2 of the Netherlands AD into this\n\nDirective. The AD requires inspection of a fuel line between the main wing tank and\n\nthe collector tank for damage which could result in fuel leaks.\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\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":2,"scope_assessment":{"changed":false,"description":"This is a standard, narrow airworthiness directive focused on a specific technical inspection for a specific aircraft type. It has not expanded beyond its original safety purpose."},"complexity_factors":["Very short document (approximately 200 words)","Only 2 defined elements: specific aircraft model applicability and the referenced Netherlands directive","No nested conditional logic or exceptions beyond the single exclusion (Mk 050 variant)","Single compliance pathway with reference to external technical document","No cross-references to other Australian legislation or regulations beyond the enabling Civil Aviation Regulations 1998","Straightforward amendment purpose: incorporation of updated foreign directive"],"plain_english_summary":"**What this is:** This is an **Airworthiness Directive (AD)** — a mandatory safety order issued by Australia's Civil Aviation Safety Authority (CASA). Think of it like a recall notice for aircraft, but legally binding.\n\n**What it does:** It requires owners and operators of **Fokker F27 aircraft** (except the Mk 050 model) to inspect a specific fuel line that runs between the main wing tank and the collector tank. The inspection checks for damage that could cause fuel leaks.\n\n**Who must follow it:** Anyone who owns, operates, or maintains a Fokker F27 aircraft in Australia (all serial numbers, excluding the Mk 050 variant).\n\n**Why it matters:** Fuel leaks in aircraft are serious safety hazards — they can cause fires or engine failure. This directive ensures a known defect is caught before it causes an accident.\n\n**What action is required:** Operators must follow the technical instructions in a Netherlands aviation safety document called **BLA 92-102 Issue 2** (dated 23 October 1992). There's also a related **Fokker Service Bulletin** (F27/28-61) that provides guidance.\n\n**When compliance is due:** The directive took effect on **7 January 1993**, with compliance timelines set by the Netherlands document.\n\n**Why it was updated:** This is **Amendment 1** — it updates the Australian directive to match a revised version of the Netherlands safety document (Issue 2)."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":true,"description":"This amendment updates the existing Directive by incorporating Issue 2 of the Netherlands AD (BLA 92-102 Issue 2 dated 23 October 1992) into the Australian AD and thus revises the mandatory technical requirement (see 'Requirement: Action in accordance with the technical requirements of the Netherlands Directive BLA 92-102 Issue 2 dated 23 October 1992' and 'Background: This amendment is raised to incorporate Issue 2 of the Netherlands AD into this Directive'). The practical scope remains focused on inspection of the fuel line between the main wing tank and the collector tank for damage that could cause fuel leaks, and applies to all Fokker F27 aircraft except Mk 050. The cost and compliance burden therefore shifts to aircraft owners/operators and their maintenance organisations, who must obtain and follow the referenced documents and meet the compliance date of 7 January 1993."},"complexity_factors":["Cross-reference to external technical directive (Netherlands Directive BLA 92-102 Issue 2) — operators must obtain and follow another regulator's document.","Reference to a manufacturer service bulletin (Fokker Service Bulletin F27/28-61) for technical execution — action details are not contained in the AD itself.","Narrow technical focus (single fuel line between main wing tank and collector tank) but requires inspection methods and possible repairs that need maintenance organisation capability.","Regulatory compliance timing specified (effective 7 January 1993) — creates a fixed compliance deadline for operators.","Applicability carve-out (all serial numbers except Mk 050) requires operators to verify airframe type/variant status before action.","Enforcement and recordkeeping burden on operators/maintenance organisations, as CASA will expect adherence to the requirement document."],"plain_english_summary":"This Airworthiness Directive requires operators of Fokker F27 aeroplanes (except Mk 050) to inspect the fuel line between the main wing tank and the collector tank for damage that could cause fuel leaks. Inspections and any corrective work must follow Netherlands Directive BLA 92‑102 Issue 2 and Fokker Service Bulletin F27/28‑61, with compliance as specified in the requirement document effective 7 January 1993. The obligation falls on aircraft owners/operators and maintenance organisations; the Civil Aviation Safety Authority enforces compliance."}},"importantCases":[],"_links":{"self":"/api/acts/ad-f27-134-amdt-1-main-wing-tank-and-collector-tank-fuel-line","history":"/api/acts/ad-f27-134-amdt-1-main-wing-tank-and-collector-tank-fuel-line/history","analysis":"/api/acts/ad-f27-134-amdt-1-main-wing-tank-and-collector-tank-fuel-line/analysis","conflicts":"/api/acts/ad-f27-134-amdt-1-main-wing-tank-and-collector-tank-fuel-line/conflicts","importantCases":"/api/acts/ad-f27-134-amdt-1-main-wing-tank-and-collector-tank-fuel-line/important-cases","documents":"/api/acts/ad-f27-134-amdt-1-main-wing-tank-and-collector-tank-fuel-line/documents"}}