{"id":"F2008L00503","name":"AD/J4100/14 - Elevator Cable Tension Regulator Lever","slug":"ad-j4100-14-elevator-cable-tension-regulator-lever","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":119338,"registerId":"commonwealth-F2008L00503-current","compilationNumber":null,"startDate":"2026-04-03","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"BAe Systems (Operations) Jetstream 4100 ","sectionType":"division","heading":"BAe Systems (Operations) Jetstream 4100 Series Aeroplanes","content":"### BAe Systems (Operations) Jetstream 4100 Series Aeroplanes\n\n| AD/J4100/14 | Elevator Cable Tension Regulator Lever | 4/2008 DM |\n| ----------- | -------------------------------------- | --------- |\n\n| Applicability: | All Jetstream Series 4100 aircraft.                                                                                                                                                                                                                                                                                                                                                                                             |\n| -------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement:   | Action in accordance with BAE Systems Mandatory Service Bulletin J41-27-059 original issue, or later CAA/EASA approved revision.Note: UK CAA AD 005-09-99 refers.                                                                                                                                                                                                                                                               |\n| Compliance:    | Unless already accomplished, within 30 days after 20 February 2008.                                                                                                                                                                                                                                                                                                                                                             |\n|                | This Airworthiness Directive becomes effective on 20 February 2008.                                                                                                                                                                                                                                                                                                                                                             |\n| Background:    | The manufacturer received a report of an incident where an elevator cable tension regulator lever became detached from the elevator cable tension regulator assembly. This resulted in reduced control of the associated elevator.This Directive requires installation of modified elevator cable tension regulator assemblies, which provides terminating action for the previously required SBJ41-A27-053 repeat inspections. |\n\n![](image.001.png)  \nDavid Villiers  \nDelegate of the Civil Aviation Safety Authority\n\n15 February 2008","sortOrder":0},{"sectionNumber":"AD/J4100/14","sectionType":"part","heading":"AD/J4100/14","content":"## AD/J4100/14","sortOrder":1},{"sectionNumber":"Elevator Cable Tension Regulator Lever","sectionType":"part","heading":"Elevator Cable Tension Regulator Lever","content":"## Elevator Cable Tension Regulator Lever","sortOrder":2},{"sectionNumber":"4/2008 DM","sectionType":"part","heading":"4/2008 DM","content":"## 4/2008 DM","sortOrder":3}],"analysis":{"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"},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This AD maintains its original narrow scope — addressing a specific mechanical defect in a specific aircraft series. The reference to terminating previous repeat inspections is a natural evolution of the safety response, not scope creep."},"complexity_factors":["Single, specific mechanical component addressed (elevator cable tension regulator lever)","Single compliance action required (installation per one service bulletin)","No defined terms section","No nested exceptions or conditional logic","Clear, fixed compliance deadline (30 days from effective date)","Cross-reference to only one external document (service bulletin J41-27-059) and one superseded requirement","Extremely short document (approximately 150 words of substantive content)"],"plain_english_summary":"This AD mandates owners/operators of BAe Systems Jetstream 4100 aircraft replace or modify the elevator cable tension regulator lever to prevent it detaching in flight, which could reduce elevator control. Work must follow manufacturer service bulletin J41-27-059 within 30 days of 20 February 2008 and, once done, ends prior repetitive inspections."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":true,"description":"Changes scope from a repeat‑inspection regime (SBJ41‑A27‑053) to a mandatory fleet‑wide hardware modification: operators must install modified elevator cable tension regulator assemblies within 30 days, and the installation provides terminating action for the previous inspections."},"complexity_factors":["Broad applicability: applies to all Jetstream Series 4100 aircraft (single‑fleet scope reduces case complexity).","Mandatory hardware change replacing an inspection regime (one‑off installation vs ongoing inspections).","Tight compliance timeframe: 30 days from 20 February 2008 creates operational scheduling pressure for owners/operators.","Dependence on a specific manufacturer Service Bulletin (J41‑27‑059) and allowance for later CAA/EASA‑approved revisions introduces regulator/manufacturer interaction.","Terminates prior mandatory repeat inspections (SBJ41‑A27‑053), changing operators' ongoing compliance obligations.","Cross-reference to UK CAA AD 005‑09‑99 indicates alignment with an external regulator, which can affect documentation and acceptance."],"plain_english_summary":"This directive requires owners/operators of all BAe Jetstream 4100 aircraft to install modified elevator cable tension regulator assemblies per BAE Mandatory Service Bulletin J41‑27‑059 (or a later CAA/EASA‑approved revision). It responds to a report that a regulator lever detached causing reduced elevator control. Compliance is mandatory within 30 days of 20 February 2008, and installing the modified assemblies terminates the previously required repeat inspections under SBJ41‑A27‑053."}},"importantCases":[],"_links":{"self":"/api/acts/ad-j4100-14-elevator-cable-tension-regulator-lever","history":"/api/acts/ad-j4100-14-elevator-cable-tension-regulator-lever/history","analysis":"/api/acts/ad-j4100-14-elevator-cable-tension-regulator-lever/analysis","conflicts":"/api/acts/ad-j4100-14-elevator-cable-tension-regulator-lever/conflicts","importantCases":"/api/acts/ad-j4100-14-elevator-cable-tension-regulator-lever/important-cases","documents":"/api/acts/ad-j4100-14-elevator-cable-tension-regulator-lever/documents"}}