{"id":"F2009L03436","name":"AD/JETSTREAM/95 Amdt 3 - Steering Actuator Piston Rod Cracking","slug":"ad-jetstream-95-amdt-3-steering-actuator-piston-rod-cracking","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":141052,"registerId":"commonwealth-F2009L03436-current","compilationNumber":null,"startDate":"2026-04-03","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/95 Amdt 3 | Steering Actuator Piston Rod Cracking | 10/2009 |\n| ---------------------- | ------------------------------------- | ------- |\n\n| Applicability: | Handley Page Ltd, Scottish Aviation Ltd, British Aerospace PLC, British Aerospace (Commercial Aircraft) Ltd, British Aerospace Regional Aircraft Ltd, Jetstream Aircraft Ltd and British Aerospace (Operations) Ltd. HP 137 Mk1, Jetstream Series 200, 3100 and 3200 aircraft if equipped with steering jack Part Number (P/N) 6182-2, P/N 6182-3 or P/N 6182-4.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           |\n| -------------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement:   | For aeroplanes equipped with steering jack P/N 6182-2, P/N 6182-3 or P/N 6182-4 incorporating Strike-off 4, installed by BAE Systems modification JM5414 (ref. BAE Systems SB 32-JM5414 dated 6 August 2004 and APPH SB 32-77 datedOctober 2003), the actions specified in Requirements 1 or 2 of this AD are not required.1. For aeroplanes where SB 32-JA020741 dated 2 November 2002 (APPH SB 32-76 dated August 2003) has not been previously accomplished:a. Inspect the steering jack piston rod, check the torque of the end fitting and determine the safe life of the steering jack piston rod in accordance with paragraph 2, Part 1 of BAE Systems SB 32-JA030644 Revision 1 dated19 August 2008.b. If the piston rod is found cracked or unserviceable during the inspection as detailed in Requirement 1a. of this AD, remove the steering jack and replace it with a serviceable unit.2. For aeroplanes on which BAE Systems SB 32-JA020741 (APPH SB 32-76) has previously been accomplished:a. Recalculate the safe life of the steering jack piston rod and re-torque the piston rod eye-end in accordance with paragraph 2, Part 2 of BAE Systems SB 32-JA030644 Revision 1.b. If the piston rod is found unserviceable during the inspection as detailed in Requirement 2a. of this AD, remove the steering jack and replace it with a serviceable unit. |\n\n|             | 3. For all aeroplanes:Do not install a steering jack piston rod with P/N 6182-2, P/N 6182-3 or P/N 6182-4 on any aeroplane, unless it has been inspected and the safe life determined in accordance with paragraph 2 of BAE Systems SB 32-JA030644 Revision 1.4. For aeroplanes modified in accordance with BAE Systems modification JM5414:Do not install any NLG steering jack P/N 6182-2, P/N 6182-3 or P/N 6182-4 on that aeroplane, unless the unit has been modified in accordance with BAE Systems SB 32-JM5414 and APPH SB 32-77.Note: EASA AD 2009-0135 dated 23 June 2009 refers. This AD supersedes UK CAA AD G-2004-0029.                                                                  |\n| ----------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |\n| Compliance: | For Requirement 1.a. - Remains unchanged as detailed in amendment 2 of this AD as: Within 2 months after 22 April 2005 (the effective date of amendment 2 of this AD), unless previously accomplished.For Requirement 1.b. - Before further flight.For Requirement 2.a. - Remains unchanged as detailed in amendment 2 of this AD as: Within 3 months after 22 April 2005, unless previously accomplished.For Requirement 2.b. - Before further flight.For Requirement 3 - From the effective date of this AD.For Requirement 4 - From the effective date of this AD.                                                                                                                                  |\n|             | This Amendment becomes effective on 24 September 2009.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 |\n| Background: | Cracks have been found in the steering jack piston rod adjacent to the eye-end and their origin is traceable to the application of a high torque applied to the eye-end during assembly of the unit. Severe cracking can lead to failure of the jack and loss of steering control.Amendment 3 confirms that for aeroplanes incorporating BAE modification JM5414, no further action is required.Amendment 2 of this AD corrected the typographical errors noted in Amendment 1.Amendment 1 was issued after the manufacturer determined that the fatigue life of the subject component needed further revision and detailed the requirements for recalculating the safe life of the subject component. |\n\n|     | Amendment 2 of this AD became effective on 22 April 2005.Amendment 1 of this AD became effective on 17 March 2005.The original issue of this AD became effective 12 June 2003. |\n| --- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |\n\n![](image.001.png)  \nJames Coyne  \nDelegate of the Civil Aviation Safety Authority\n\n14 August 2009","sortOrder":0},{"sectionNumber":"AD/JETSTREAM/95 Amdt 3","sectionType":"part","heading":"AD/JETSTREAM/95 Amdt 3","content":"## AD/JETSTREAM/95 Amdt 3","sortOrder":1},{"sectionNumber":"Steering Actuator Piston Rod Cracking","sectionType":"part","heading":"Steering Actuator Piston Rod Cracking","content":"## Steering Actuator Piston Rod Cracking","sortOrder":2},{"sectionNumber":"10/2009","sectionType":"part","heading":"10/2009","content":"## 10/2009","sortOrder":3}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":6,"scope_assessment":{"changed":true,"description":"The original 2003 AD addressed a straightforward safety defect requiring inspection and replacement. Through three amendments, the scope has expanded to: (1) incorporate revised fatigue life calculations, (2) add recalculation requirements for previously inspected aircraft, (3) introduce installation prohibitions, (4) create exemptions for modified aircraft, and (5) establish a permanent solution pathway via modification JM5414. The directive has evolved from a simple 'inspect and replace' mandate into a complex matrix of historical compliance tracking, alternative compliance paths, and grandfathering provisions."},"complexity_factors":["Multiple conditional pathways based on prior maintenance history (Requirements 1 vs 2)","Cross-references to four different Service Bulletins (SB 32-JA020741, SB 32-JA030644, SB 32-JM5414, APPH SB 32-76/77) and one modification (JM5414)","Nested exceptions: Requirement 1 and 2 actions are waived for aircraft with Strike-off 4 installed via modification JM5414","Four distinct part numbers (P/N 6182-2, 6182-3, 6182-4) with varying applicability","Multiple effective dates and compliance timeframes (2 months, 3 months, 'before further flight', 'from effective date')","Amendment history tracking (original 2003, Amendment 1 2005, Amendment 2 2005, Amendment 3 2009) with partial supersession of prior requirements","Dual manufacturer nomenclature (BAE Systems and APPH — former vs current manufacturer)","Technical aviation terminology requiring specialized knowledge (Strike-off, safe life, eye-end, torque values)"],"plain_english_summary":"This CASA Airworthiness Directive mandates inspection and safe‑life calculation for nose‑wheel steering jack piston rods on certain British Aerospace Jetstream HP 137/Series 200/3100/3200 aircraft fitted with part numbers 6182‑2/‑3/‑4, because cracks near the eye‑end from over‑torquing can cause loss of ground steering. Affected jacks must be inspected, re‑torqued or replaced if cracked, and cannot be reinstalled unless assessed. Aircraft modified by BAE JM5414 are exempt from further inspections under this amendment."},"flash_summary":{"complexity_score":5,"scope_assessment":{"changed":true,"description":"Yes. The amendment narrows the AD’s active obligations for aircraft that have been modified by BAE Systems modification JM5414: Amendment 3 confirms that aircraft incorporating JM5414 do not require the remaining actions of the AD (see Requirement 4 and Background). The AD continues to apply inspection, life-recalculation, re-torque and replacement obligations to other aircraft and prohibits installation of the listed piston rods unless inspected or modified; it also supersedes the prior UK CAA AD G-2004-0029 (Background)."},"complexity_factors":["Applicability matrix ties multiple legacy manufacturers and several Jetstream variants to specific part numbers (P/N 6182-2/6182-3/6182-4) — increases scope-matching complexity.","Multiple conditional tracks: different actions depending on whether BAE/APPH SB 32-JA020741 (SB 32-76) was previously accomplished (Requirements 1 vs 2).","Cross-references to several service bulletins (BAE Systems SB 32-JA030644 Rev 1; SB 32-JA020741; SB 32-JM5414; APPH SBs 32-76/32-77) — technical content and compliance steps are in external documents.","Required engineering judgement: operators/maintenance organisations must 'determine the safe life' and 'recalculate the safe life' of piston rods per SB instructions (Requirements 1a, 2a) — creates reliance on SB procedures and maintenance decision-making.","Immediate operational constraints: cracked or unserviceable rods must be removed ‘before further flight’ (Requirements 1b, 2b) — high operational impact and potential for aircraft downtime.","Installation prohibitions tied to inspection/ modification status (Requirements 3 and 4) — ongoing supply/maintenance-control implications.","Staggered compliance deadlines (e.g. within 2 months, within 3 months, before further flight, and from effective date) require records tracking and scheduling (Compliance).","Amendment history and supersession of prior ADs (supersedes UK CAA AD G-2004-0029; Amendments 1–3) adds interpretive complexity for operators reconciling legacy compliance actions (Background)."],"plain_english_summary":"Requires inspection, torque-check, safe-life recalculation, and removal/replacement of steering jack piston rods (P/N 6182-2, 6182-3, 6182-4) on specified Handley Page/Jetstream/BAe 3100-series aircraft, and bans installing those rods unless inspected or modified. It addresses cracks found adjacent to the eye-end traceable to over-torquing that can cause jack failure and loss of nose-wheel steering. Amendment 3 confirms aircraft modified by BAE JM5414 need no further action; operators and maintenance organisations must follow the listed service bulletins within the stated time limits."},"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"}},"importantCases":[],"_links":{"self":"/api/acts/ad-jetstream-95-amdt-3-steering-actuator-piston-rod-cracking","history":"/api/acts/ad-jetstream-95-amdt-3-steering-actuator-piston-rod-cracking/history","analysis":"/api/acts/ad-jetstream-95-amdt-3-steering-actuator-piston-rod-cracking/analysis","conflicts":"/api/acts/ad-jetstream-95-amdt-3-steering-actuator-piston-rod-cracking/conflicts","importantCases":"/api/acts/ad-jetstream-95-amdt-3-steering-actuator-piston-rod-cracking/important-cases","documents":"/api/acts/ad-jetstream-95-amdt-3-steering-actuator-piston-rod-cracking/documents"}}