{"id":"F2010L02755","name":"AD/JETSTREAM/107 Amdt 1 - Nosewheel Steering Selector Valve","slug":"ad-jetstream-107-amdt-1-nosewheel-steering-selector-valve","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":84714,"registerId":"commonwealth-F2010L02755-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"British Aerospace BAe 3100 (Jetstream) S","sectionType":"division","heading":"British Aerospace BAe 3100 (Jetstream) Series Aeroplanes","content":"### British Aerospace BAe 3100 (Jetstream) Series Aeroplanes\n\n| AD/JETSTREAM/107 Amdt 1 | Nosewheel Steering Selector Valve | 21/2010 |\n| ----------------------- | --------------------------------- | ------- |\n\n| Applicability: | Jetstream Series 3100 and 3200 aircraft.                                                                                                                                                                                                                                                                                                                                                                                                            |\n| -------------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement:   | Overhaul the nosewheel steering selector valve in accordance with the requirements in Jetstream Service Bulletin 32-JA980841 Rev 1 or an equivalent document.Note: UK CAA AD 007-10-98 refers.                                                                                                                                                                                                                                                      |\n| Compliance:    | Initial valve overhaul: Unless already accomplished, before further flight after5 November 2010.Subsequent overhauls: At intervals not exceeding 10,000 landings or 6 years, whichever occurs first, after the previous valve overhaul.                                                                                                                                                                                                             |\n|                | This Amendment becomes effective on 5 November 2010.                                                                                                                                                                                                                                                                                                                                                                                                |\n| Background:    | The manufacturer investigated an uncommanded steer off the runway and found a contributory cause was excessive wear in the nosewheel steering selector valve differential.This Airworthiness Directive was originally issued in October 2010 and nominated SB 32-JA980841 at its original issue which specified subsequent overhauls at intervals not exceeding 10,000 hours time in service.This Amendment specifies SB 32-JA980841 at Revision 1. |\n\n![](image.001.png)\n\nMike Higgins  \nDelegate of the Civil Aviation Safety Authority\n\n15 October 2010","sortOrder":0},{"sectionNumber":"AD/JETSTREAM/107 Amdt 1","sectionType":"part","heading":"AD/JETSTREAM/107 Amdt 1","content":"## AD/JETSTREAM/107 Amdt 1","sortOrder":1},{"sectionNumber":"Nosewheel Steering Selector Valve","sectionType":"part","heading":"Nosewheel Steering Selector Valve","content":"## Nosewheel Steering Selector Valve","sortOrder":2},{"sectionNumber":"21/2010","sectionType":"part","heading":"21/2010","content":"## 21/2010","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"},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":true,"description":"Yes. The Amendment shifts the recurring overhaul metric away from the original 10,000 hours time-in-service to intervals of 10,000 landings or 6 years (whichever first), and specifies SB 32-JA980841 Rev 1 as the compliance document. This changes what operators must monitor (landings and calendar age rather than hours) and may alter overhaul timing and maintenance planning (Background; Requirement; Compliance)."},"complexity_factors":["Single, specific technical action: mandatory overhaul of the nosewheel steering selector valve per SB 32-JA980841 Rev 1 (Requirement).","Clear initial compliance deadline: before further flight after 5 November 2010 unless already done (Compliance).","Recurring interval uses dual metric (10,000 landings OR 6 years) requiring operators to record landings and calendar time (Compliance).","Amendment replaces previous hours-based interval (10,000 hours TIS) with a landings/years metric, creating a need to convert historic maintenance planning and records (Background; Requirement).","Reference to 'an equivalent document' allows some operator/regulator discretion about acceptable alternative procedures, creating a minor interpretation burden (Requirement).","Cross-reference to UK CAA AD may require operators to consult another authority's material for context (Background)."],"plain_english_summary":"This Airworthiness Directive requires operators of Jetstream 3100/3200 aircraft to overhaul the nosewheel steering selector valve in line with Jetstream Service Bulletin 32-JA980841 Revision 1, with any initial overhaul completed before further flight after 5 November 2010 and repeat overhauls every 10,000 landings or 6 years, whichever comes first. The regulator says the measure responds to an incident of uncommanded runway steering linked to valve wear. Operators pay overhaul costs, must track landings/age, and adjust maintenance scheduling to meet the intervals."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This amendment makes a technical correction to the compliance interval (changing from flight hours to landings) but does not expand the scope beyond the original safety purpose of preventing nosewheel steering failures."},"complexity_factors":["Single, specific mechanical component targeted","Only two compliance triggers: initial deadline and recurring interval","Clear, unambiguous applicability (two specific aircraft models)","No nested definitions or cross-referenced legislative provisions","Single external reference to a service bulletin (SB 32-JA980841 Rev 1)","Straightforward temporal compliance framework (calendar date + flight cycles)"],"plain_english_summary":"Owners/operators of British Aerospace Jetstream 3100/3200 aircraft must overhaul the nosewheel steering selector valve — a hydraulic component whose excessive wear caused an uncommanded runway excursion.  \n\nThis AD changes the recurring interval from 10,000 flight hours to 10,000 landings (or every 6 years), affecting airlines, charter operators, and private owners in Australia to reduce risk of runway excursions, damage, injuries, and fatalities."}},"importantCases":[],"_links":{"self":"/api/acts/ad-jetstream-107-amdt-1-nosewheel-steering-selector-valve","history":"/api/acts/ad-jetstream-107-amdt-1-nosewheel-steering-selector-valve/history","analysis":"/api/acts/ad-jetstream-107-amdt-1-nosewheel-steering-selector-valve/analysis","conflicts":"/api/acts/ad-jetstream-107-amdt-1-nosewheel-steering-selector-valve/conflicts","importantCases":"/api/acts/ad-jetstream-107-amdt-1-nosewheel-steering-selector-valve/important-cases","documents":"/api/acts/ad-jetstream-107-amdt-1-nosewheel-steering-selector-valve/documents"}}