{"id":"F2006B09642","name":"AD/F100/40 - Aircraft Flight Manual - Liftdumper Limitations","slug":"ad-f100-40-aircraft-flight-manual-liftdumper-limitations","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":54453,"registerId":"commonwealth-F2006B09642-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/F100/40 - Aircraft Flight Manual - Liftdumper Limitations","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)  \n![](image.002.png)  Fokker F100 (F28 Mk 100) Series Aeroplanes\n\n \n\nAIRWORTHINESS DIRECTIVE\n\n![](image.002.png)\n\n![](image.002.png)  For the reasons set out in the background section, the CASA delegate whose signature appears below issues the following Airworthiness Directive (AD) under subregulation 39.1 (1) of CAR 1998. The AD requires that the action set out in the requirement section (being action that the delegate considers necessary to correct the unsafe condition) be taken in relation to the aircraft or aeronautical product mentioned in the applicability section: (a) in the circumstances mentioned in the requirement section; and (b) in accordance with the instructions set out in the requirement section; and (c) at the time mentioned in the compliance section.\n\n \n\n| AD/F100/40 | Aircraft Flight Manual - Liftdumper Limitations | 6/2000<br>TX |\n| --- | --- | --- |\n| Applicability:<br> <br>Requirement: | Model F.28 Mk.0070 and Mk.0100 aeroplanes.<br> <br>Amend the Aircraft Flight Manual (AFM) as follows: |  |\n\n\n \n\n1. Add the following to Section 1 - LIMITATIONS, sub-section MISCELLANEOUS LIMITATIONS:\n\n\n \n\n# FLIGHT CONTROLS\n\n \n\nNORMAL OPERATION OF LIFTDUMPERS:\n\n \n\n- Do not arm the liftdumper system before landing gear is down and locked.\n\n \n\nb.   Add the following to Section 5 - NORMAL PROCEDURES, sub-section APPROACH AND LANDING, after the subject APPROACH:\n\n \n\n# BEFORE LANDING\n\n \n\nWARNING: DO NOT ARM THE LIFT DUMPER SYSTEM BEFORE LANDING GEAR IS DOWN AND LOCKED\n\n \n\nThe AFM amendment required by this Directive may be accomplished by inserting a copy of this Directive in the AFM.\n\n \n\nNote 1: Fokker 70/100 All Operator Message No AOF100.071 and Manual Change Notification - Operational Documentation (MNCO) F100-011 Revision 1, both dated 10 February 2000 pertain to this Directive.\n\n \n\nNote 2: Netherlands RLD AD 1998-042/2 (A) refers.\n\n \n\nCompliance: Before further flight after the effective date of this Directive.\n\n \n\nThis Airworthiness Directive becomes effective on 12 April 2000.\n\nCOMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n \n\n \n\n \n\nBackground: The Netherlands Rijksluchtvaartdienst (RLD) has received reports of inflight deployment of liftdumpers, this resulted in the issue of three separate Dutch airworthiness directives. CASA responded by issuing AD/F100/33 and AD/F100/38. Since then the RLD has received another report of inflight liftdumper deployment.\n\n \n\nThis Directive introduces an AFM amendment to ensure flight crew do not arm the liftdumpers before the landing gear is down and locked. The RLD anticipates that following further investigation, additional rulemaking action may be necessary.\n\n![Signature of Bernard Malcolm Hole, Delegate of the Civil Aviation Safety Authority.](image.003.png)  \n\n\n \n\nBernard Malcolm Hole\n\nDelegate of the Civil Aviation Safety Authority 10 April 2000\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![](image.002.png)  \n\n\nThe above AD is notified in the Commonwealth of Australia Gazette on 12 April 2000.\n","sortOrder":0}],"analysis":{"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"The Directive aligns with the original safety objective (prevent inflight liftdumper deployment) by adding an AFM limitation and a procedural warning. It does not broaden applicability beyond the named aircraft models, nor impose physical modifications—only an administrative/manual change and immediate operational restriction."},"complexity_factors":["Narrow technical scope limited to liftdumper arming procedure for specific models (F.28 Mk.0070 and Mk.0100)","Administrative compliance mechanism (AFM insertion) rather than engineering modification","Immediate compliance timing: 'before further flight' creates operational urgency","Cross-references to prior CASA ADs (AD/F100/33 and AD/F100/38) and Netherlands RLD AD 1998-042/2","Potential for additional rulemaking later (RLD anticipates further action)","Operational impact concentrated on operators and flight crews (manual change, procedure-following)"],"plain_english_summary":"Amends the Aircraft Flight Manual for Fokker F.28 Mk.0070 and Mk.0100 aircraft to prohibit arming the liftdumper system until the landing gear is down and locked. CASA issued this Airworthiness Directive after reports of inflight liftdumper deployment; operators must insert the directive into the AFM and ensure flight crews follow the new before-landing procedure. Compliance is required before the next flight and is achieved by an administrative AFM amendment."},"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 unsafe condition (inflight liftdumper deployment) on a specific aircraft type. The background notes that further rulemaking may follow, but this instrument itself does not expand beyond its original safety purpose."},"complexity_factors":["Single, specific aircraft type (Fokker F70/F100)","Only two procedural amendments required (one to Limitations section, one to Normal Procedures)","No defined terms section — uses plain aviation terminology","No nested exceptions or conditional logic — straightforward 'do not arm until...' instruction","Single compliance deadline ('before further flight after effective date')","Short document (~400 words) with clear structure: Applicability, Requirement, Compliance, Background","Cross-references to related Dutch AD and manufacturer bulletins are informational only, not operative"],"plain_english_summary":"This CASA Airworthiness Directive requires operators of Fokker F70 and F100 aircraft to add a flight‑manual limitation and normal‑procedure note: do not arm the liftdumper (spoiler) system until the landing gear is fully down and locked. It’s a mandatory, immediate mitigation after reports of accidental in‑flight liftdumper deployments, protecting passengers and crew while the root cause was investigated."}},"importantCases":[],"_links":{"self":"/api/acts/ad-f100-40-aircraft-flight-manual-liftdumper-limitations","history":"/api/acts/ad-f100-40-aircraft-flight-manual-liftdumper-limitations/history","analysis":"/api/acts/ad-f100-40-aircraft-flight-manual-liftdumper-limitations/analysis","conflicts":"/api/acts/ad-f100-40-aircraft-flight-manual-liftdumper-limitations/conflicts","importantCases":"/api/acts/ad-f100-40-aircraft-flight-manual-liftdumper-limitations/important-cases","documents":"/api/acts/ad-f100-40-aircraft-flight-manual-liftdumper-limitations/documents"}}