{"id":"F2008L00504","name":"AD/J4100/15 - Placard to Prohibit Aircraft Pushback with Engines Running","slug":"ad-j4100-15-placard-to-prohibit-aircraft-pushback-with-engines-running","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":119341,"registerId":"commonwealth-F2008L00504-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/J4100/15 | Placard to Prohibit Aircraft Pushback with Engines Running | 4/2008 DM |\n| ----------- | ---------------------------------------------------------- | --------- |\n\n| Applicability: | All Jetstream Series 4100 aircraft.                                                                                                                                                                                                                                                                                                                                                                                                                           |\n| -------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement:   | Action in accordance with BAe Regional Aircraft Alert Service Bulletin J41-11-024, original issue, or later CAA/EASA approved revision.Note: UK CAA AD 004-05-99 refers.                                                                                                                                                                                                                                                                                      |\n| Compliance:    | For aircraft with a nose landing gear shock strut which has already achieved 12,000 landings, install the placard specified in the Requirement document within 30 days after 20 February 2008; unless already accomplished.For all other aircraft, the required placard must be installed when the nose landing gear shock strut reaches 12,000 landings.                                                                                                     |\n|                | This Airworthiness Directive becomes effective on 20 February 2008.                                                                                                                                                                                                                                                                                                                                                                                           |\n| Background:    | Operators of high time aircraft have reported they are approaching the published life limitations for nose landing gear parts. The mandatory life limitations for some nose landing gear shock struts, currently running at 12,000 landings, are constrained by the life of the towing bracket. Pending introduction of a re-identified shock strut towing bracket, an operational restriction is imposed to prohibit aircraft pushback with engines running. |\n\n![](image.001.png)  \nDavid Villiers  \nDelegate of the Civil Aviation Safety Authority\n\n15 February 2008","sortOrder":0},{"sectionNumber":"AD/J4100/15","sectionType":"part","heading":"AD/J4100/15","content":"## AD/J4100/15","sortOrder":1},{"sectionNumber":"Placard to Prohibit Aircraft Pushback wi","sectionType":"part","heading":"Placard to Prohibit Aircraft Pushback with Engines Running","content":"## Placard to Prohibit Aircraft Pushback with Engines Running","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: a temporary operational restriction on a specific aircraft type pending a parts modification. The scope has not expanded beyond the original safety issue (nose landing gear towing bracket life limits)."},"complexity_factors":["Single, specific requirement (install a placard)","Only one defined threshold (12,000 landings)","Two simple compliance pathways based on landing count","No nested exceptions or conditional logic","Short document (under 300 words of substantive text)","Single cross-reference to manufacturer service bulletin"],"plain_english_summary":"This AD mandates that BAe Jetstream 4100 operators install a cockpit placard prohibiting pushback with engines running. It responds to wear of the nose-gear towing bracket after about 12,000 landings, which makes engine‑on pushback hazardous. The placard must be fitted once an aircraft reaches that landing threshold (or within 30 days if already past it). It’s a temporary operational restriction pending a redesigned towing bracket."},"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"Scope is limited to Jetstream Series 4100 aeroplanes and imposes a temporary operational restriction tied to nose landing gear shock strut life and the towing bracket issue. The directive aligns with its stated purpose in the Background to prohibit pushback with engines running pending introduction of a re‑identified towing bracket and does not broaden obligations beyond that target."},"complexity_factors":["Narrow applicability: limited to BAe Jetstream 4100 series (Applicability).","Clear, single technical action: install a placard per BAe Regional Aircraft Alert Service Bulletin J41‑11‑024 (Requirement).","Conditional compliance timing based on a numeric maintenance threshold: installation when nose landing gear shock strut reaches 12,000 landings, or within 30 days of 20 Feb 2008 if already exceeded (Compliance).","Operational practice change: prohibits pushback with engines running, affecting ground handling procedures (Background/Requirement).","Regulatory dependency: must follow original or later CAA/EASA‑approved revisions of the service bulletin (Requirement), creating reliance on regulator approval for later changes.","Administrative burden: operators must monitor and record shock strut landing counts to determine compliance timing (Compliance)."],"plain_english_summary":"This directive requires operators of all BAe Jetstream 4100 series aircraft to install a placard prohibiting pushback with engines running, installed per BAe Regional Aircraft Alert Service Bulletin J41‑11‑024. The placard must be fitted when the nose landing gear shock strut reaches 12,000 landings (or within 30 days of 20 February 2008 for aircraft already beyond that count).\n\nOperators pay to fit the placard and must change ground‑handling practice until a re‑identified towing bracket is introduced; compliance depends on tracking shock‑strut landing counts and following CAA/EASA‑approved service bulletin revisions."}},"importantCases":[],"_links":{"self":"/api/acts/ad-j4100-15-placard-to-prohibit-aircraft-pushback-with-engines-running","history":"/api/acts/ad-j4100-15-placard-to-prohibit-aircraft-pushback-with-engines-running/history","analysis":"/api/acts/ad-j4100-15-placard-to-prohibit-aircraft-pushback-with-engines-running/analysis","conflicts":"/api/acts/ad-j4100-15-placard-to-prohibit-aircraft-pushback-with-engines-running/conflicts","importantCases":"/api/acts/ad-j4100-15-placard-to-prohibit-aircraft-pushback-with-engines-running/important-cases","documents":"/api/acts/ad-j4100-15-placard-to-prohibit-aircraft-pushback-with-engines-running/documents"}}