{"id":"F2006L01054","name":"AD/AMD 50/34 - Ice and Rain Protection - Outboard Leading Edge Slats","slug":"ad-amd-50-34-ice-and-rain-protection-outboard-leading-edge-slats","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":58351,"registerId":"commonwealth-F2006L01054-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"AMD Falcon 50 and 900 Series Aeroplanes","sectionType":"division","heading":"AMD Falcon 50 and 900 Series Aeroplanes","content":"### AMD Falcon 50 and 900 Series Aeroplanes\n\n| AD/AMD 50/34 | Ice and Rain Protection - OutboardLeading Edge Slats | 5/2006 |\n| ------------ | ---------------------------------------------------- | ------ |\n\n| Applicability: | Mystere - Falcon 50 aircraft S/N 2 to 344.Mystere - Falcon 900 aircraft S/N 1 to 202.Falcon 900EX aircraft S/N 1 to 96, 98 to 154. |\n| -------------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement: | 1. Inspect the outboard slats in accordance with the instructions detailed in F50-475, F900-370, or F900EX-273 as is applicable.2. For MF5O which have incorrect slats installed:(a) Insert into the Aeroplane Flight Manual (AFM), Temporary Change (TC) No 61 (AFM reference DTM813 or DTM8O3) or TC No 75 (AFM reference FM813EX).(b) Replace the anti-icing manifold according to the instructions in SB F50-478.The AFM TC inserted in requirement 2(a) of this AD may be removed after carrying out the actions detailed in requirement 2(b) of this AD, which is a terminating action for this AD for MF5O aircraft.3. For MF900 and F900EX which have incorrect slats installed:Repair the manifold according to the instructions detailed in F900-370, or F900EX-273 as is applicable.This is a terminating action for this AD for the relevant aircraft.Note: EASA AD 2006-0037dated 1 February 2006 refers. |\n| Compliance: | 1. Within 330 Flight Hours (FH) or 7 months, whichever comes first, following the effective date of this AD.2. (a) Before further flight.2. (b) Within 1530 FH following the inspection detailed in Requirement 1 of this AD. |\n\n| | 3. Before further flight. |\n| ----------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| | This Airworthiness Directive becomes effective on 11 May 2006. |\n| Background: | Wings of MF5O, MF900, F900EX, F2000 and F2000EX are aerodynamically identical on many points. Outboard slats on all 5 models have the same external shape and are mechanically interchangeable. However, hot air anti-icing systems on MF5O are different from those on MF900 I F900EX I F2000 and F2000EX aeroplanes; therefore the slats are functionally not equivalent.It has been found, during an internal review, that interchangeability of outboard slats between MFSO and MF900 I F900EX or F2000 / F2000EX had been erroneously authorized in some limited cases. The outboard slats P/N identification plates also appear to be misleading. Exchanges occurring after delivery of the aircraft may have led to installation of outboard slats of the type not adapted to the aircraft model. Repairs may have led to installation of anti-icing manifolds (“piccolos tubes”) of a type not adapted to the aircraft model.This may jeopardize the aircraft, by modifying its anti-icing performance.The purpose of this Airworthiness Directive (AD) is to check that all aircraft are fitted with the correct outboard slats, and to correct, either by an exchange or a repair, any discrepancy encountered. |\n\n![](image.001.png) \nJames Coyne \nDelegate of the Civil Aviation Safety Authority\n\n17 March 2006","sortOrder":0},{"sectionNumber":"AD/AMD 50/34","sectionType":"part","heading":"AD/AMD 50/34","content":"## AD/AMD 50/34","sortOrder":1},{"sectionNumber":"Ice and Rain Protection - OutboardLeadin","sectionType":"part","heading":"Ice and Rain Protection - OutboardLeading Edge Slats","content":"## Ice and Rain Protection - Outboard \nLeading Edge Slats","sortOrder":2},{"sectionNumber":"5/2006","sectionType":"part","heading":"5/2006","content":"## 5/2006","sortOrder":3}],"analysis":{"flash_summary":{"complexity_score":4,"scope_assessment":{"changed":false,"description":"The AD implements its stated original purpose: verify and correct incorrect outboard slat and anti-icing manifold installations on the listed Falcon 50/900 series aircraft. It confines obligations to ice‑protection components (inspections, AFM temporary changes, repairs or replacements) and enforces compliance within specified time/flight-hour limits, without expanding to unrelated systems or duties."},"complexity_factors":["Applicability limited to specific models and serial-number ranges, requiring careful fleet identification (Applicability).","Different corrective paths by model: AFM temporary change plus manifold replacement for Falcon 50, versus manifold repair for Falcon 900/900EX (Requirement 2–3).","Multiple external service documents referenced for inspection and repair procedures (F50-475, F900-370, F900EX-273, SB F50-478, AFM TCs) increasing procedural dependency (Requirement/Requirement notes).","Staggered compliance deadlines expressed in flight hours and calendar months (Compliance), forcing operational scheduling and record-keeping.","Operators must insert and later remove AFM Temporary Changes as an interim administrative action (Requirement 2(a)/(b)), adding administrative burden.","Technical ambiguity from misleading part-number plates and prior erroneous interchangeability increases inspection difficulty and risk of incorrect corrective action (Background).","Safety-critical anti-icing function raises implementation risk and requires precise conformity to service instructions to be effective (Background/Requirement)."],"plain_english_summary":"Requires operators of specified Mystère-Falcon 50, 900 and 900EX aircraft (listed serial ranges) to inspect outboard leading-edge slats and, where incorrect slats or anti‑icing manifolds are found, install correct parts or repair manifolds per manufacturer instructions. It also mandates temporary AFM changes for some aircraft until repairs are completed. Aircraft owners/operators bear the cost and must meet specified flight‑hour or calendar time compliance limits to restore the intended anti‑icing performance and terminate the directive."},"kimi_summary":{"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"This AD maintains focused scope on its original safety purpose: correcting a specific parts interchangeability issue affecting ice protection systems on defined Falcon aircraft models. The requirements remain tightly bounded to inspection and remediation of outboard slat configurations without expansion into unrelated systems or aircraft types."},"complexity_factors":["Single-issue directive with clear sequential requirements (inspect → identify → remediate)","Only 3 main requirements with straightforward conditional branches (Falcon 50 vs 900/900EX)","Limited cross-referencing: references 3 Dassault service bulletins (F50-475, F900-370, F900EX-273) and 1 EASA AD","Simple compliance timeline: single deadline for inspection, immediate action for flight manual insertion, secondary deadline for permanent repair","No nested definitions or interpretation section — terms used are standard aviation maintenance terminology","Background clearly explains the technical issue (mechanical interchangeability vs functional incompatibility)"],"plain_english_summary":"This CASA Airworthiness Directive mandates inspection and corrective action for certain Dassault Falcon 50, 900 and 900EX jets after discovery that outboard leading edge slats (and internal piccolo tubes) may be wrongly fitted between models, risking anti-ice failure. Owners must inspect within 330 flight hours or 7 months and, if incorrect parts are found, follow model-specific temporary restrictions and mandated repairs or manifold replacement on a specified timeline. It prevents wing ice buildup that could degrade lift and control."},"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-amd-50-34-ice-and-rain-protection-outboard-leading-edge-slats","history":"/api/acts/ad-amd-50-34-ice-and-rain-protection-outboard-leading-edge-slats/history","analysis":"/api/acts/ad-amd-50-34-ice-and-rain-protection-outboard-leading-edge-slats/analysis","conflicts":"/api/acts/ad-amd-50-34-ice-and-rain-protection-outboard-leading-edge-slats/conflicts","importantCases":"/api/acts/ad-amd-50-34-ice-and-rain-protection-outboard-leading-edge-slats/important-cases","documents":"/api/acts/ad-amd-50-34-ice-and-rain-protection-outboard-leading-edge-slats/documents"}}