{"id":"F2006B09684","name":"AD/F27/116 - Electrical Power - Upper Fuselage Cable Loom","slug":"ad-f27-116-electrical-power-upper-fuselage-cable-loom","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":115830,"registerId":"commonwealth-F2006B09684-current","compilationNumber":null,"startDate":"2026-04-03","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/F27/116 - Electrical Power - Upper Fuselage Cable Loom","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/F27/116 Electrical Power - Upper Fuselage Cable Loom 1/89\n\nApplicability: All F27 Mk 500 aircraft serial numbers 10623 to 10692 inclusive. Requirement: Action in accordance with Fokker SB F27/24-77 or later.\n\nNote: RLD BLA 88-40 refers.\n\n \n\nCompliance: Prior to 26 April 1989.\n\n \n\nBackground: Chafing of the cable loom on the upper fuselage has been reported by Fokker.\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\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 discrete, time-limited safety directive addressing a specific technical defect in a specific aircraft type. It has not expanded beyond its original purpose of mandating a wiring inspection/repair."},"complexity_factors":["Very short document (approximately 150 words)","Only 1 defined applicability criterion (specific serial number range)","Single compliance action referencing an external technical document (Fokker Service Bulletin)","No nested conditions, exceptions, or cross-references to other legislation","Simple linear structure: applicability → requirement → compliance date → background"],"plain_english_summary":"This is an **Airworthiness Directive (AD)** issued by Australia's Civil Aviation Safety Authority (CASA) under the Civil Aviation Regulations 1998. It applies to specific **Fokker F27 Mk 500 aircraft** (serial numbers 10623 to 10692).\n\n**What it does:**\n- Requires aircraft operators to inspect and fix a problem with electrical cables running along the upper fuselage (the top part of the aircraft body).\n- The cables have been rubbing against the aircraft structure (\"chafing\"), which could damage the wiring and create safety risks.\n\n**Who must act:**\n- Owners and operators of the affected Fokker F27 aircraft.\n\n**What action is required:**\n- Follow the instructions in **Fokker Service Bulletin F27/24-77** (or a later version) to address the cable chafing issue.\n\n**Deadline:**\n- The work must be completed **before 26 April 1989**.\n\n**Why it matters:**\nDamaged electrical wiring can cause electrical failures, fires, or loss of critical aircraft systems. This directive ensures a known safety defect is fixed before it causes an accident."},"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"The directive’s scope is limited and explicit in the text: it applies to F27 Mk 500 aircraft serial numbers 10623 to 10692 and requires actions per Fokker SB F27/24-77 (or later) to address reported chafing of the upper fuselage cable loom. The document itself contains no language indicating a change from an earlier or different scope; therefore there is no evidence in the text that the scope has changed from its original intent (Applicability; Requirement; Background)."},"complexity_factors":["Narrow applicability: only F27 Mk 500 aircraft serial numbers 10623–10692 (Applicability)","External technical reference: required actions are defined by Fokker SB F27/24-77 or a later revision rather than spelled out in the directive (Requirement)","Fixed compliance deadline: a single date (prior to 26 April 1989) creates scheduling pressure (Compliance)","Minimal procedural detail in the directive: enforcement and verification rely on cross-reference to the service bulletin (Requirement)","Ambiguity introduced by “or later”: later revisions may alter technical requirements without amending the directive text (Requirement)","Administrative note referencing RLD BLA 88-40 adds an additional cross-reference (Note)"],"plain_english_summary":"This airworthiness directive requires owners/operators of Fokker F27 Mk 500 aeroplanes serial numbers 10623–10692 to carry out the work specified in Fokker Service Bulletin F27/24-77 (or a later revision) to inspect/rectify reported chafing of the upper-fuselage cable loom, with compliance required before 26 April 1989. Maintenance organisations must perform the work; costs and downtime fall to aircraft owners/operators."}},"importantCases":[],"_links":{"self":"/api/acts/ad-f27-116-electrical-power-upper-fuselage-cable-loom","history":"/api/acts/ad-f27-116-electrical-power-upper-fuselage-cable-loom/history","analysis":"/api/acts/ad-f27-116-electrical-power-upper-fuselage-cable-loom/analysis","conflicts":"/api/acts/ad-f27-116-electrical-power-upper-fuselage-cable-loom/conflicts","importantCases":"/api/acts/ad-f27-116-electrical-power-upper-fuselage-cable-loom/important-cases","documents":"/api/acts/ad-f27-116-electrical-power-upper-fuselage-cable-loom/documents"}}