AD NUMBER: AD/AMD 10/25 Wing Anti-Ice Hoses 4/2005TX
APPLICABILITY: Dassault Falcon 10
REQUIREMENT: 1. AFM Limitations: Insert the following operational limitations into the Aircraft Flight Manual (this can be achieved by inserting a copy of this AD in the AFM Limitations Section, at the first page of the Section: "Flights in icing conditions are prohibited"
2. Inspection: (a) Carry out initial and repetitive inspections in accordance with Service Bulletin (SB) Fl0-A312.
(b) If during inspection: some blisters (separation) are discovered on the internal wall of the hose, replace the hose by a new one referenced FAL1005D in accordance with SB Fl0-A312 or later DGAC approved revisions.
(c) Send back the SB inspection report to the aircraft manufacturer when available: indicate on this report for each inspected hose: Its flight hours: its position on the wing (inboard or outboard). Its number of cycles in icing conditions and its manufacturing date.
3. Limitations: The following Airworthiness Limitations Inspection must be inserted in the Chapter 5-40 of the maintenance manual(this can be achieved by inserting a copy of this AD in Chapter 5-40): Operation Reference Threshold Periodicity
30 - Anti-icing: Visual inspection of the anti-icing flexible hoses of the wing slats. SB-F10-A312 60 flights or 3 months
Life Limit : 3000h
4. Terminating Actions: Accomplishment of Requirements 2 and 3 of this Directive cancels the limitations introduced in Requirement 1 of this Directive.
5. Alternative Means Of Compliance (AMOC): In lieu of the actions required by Requirements 2 and 3 of this Directive perform the following actions:
(a) Carry out requirement 1 of this Directive.
(b) Fit a placard in the cockpit within clear view of the flight crew stating:
"Flights in icing conditions are prohibited"
Note: DGAC AD UF-2005-041 EASA approval No. 2005-1986 dated 25 February
2005 refers.
COMPLIANCE: For Requirement 1: Unless previously accomplished before further flight.
For Requirement 2: Unless previously accomplished initial inspection to be within 10 flight cycles from the effective date of this Directive, thereafter repeat inspections at intervals not to exceed 60 flight cycles or 3 months whichever occurs first.
For Requirements 3 and 4: Unless previously accomplished within 10 flight cycles from the effective date of this Directive.
For Requirement 5: Prior to further flight whenever the actions detailed in Requirements 2 or 3 are not met.
This Airworthiness Directive becomes effective on 8 March 2005.
BACKGROUND: This Directive is issued following the discovery of wing anti-ice flexible hoses found collapsed on an in-service Falcon 10. The hose has collapsed because of the internal ply separation of the flexible hose. The first analysis of this incident leads to define a temporary periodicity of inspection of 60 flights for this equipment. The consequence on the aircraft of these collapsed hoses might be insufficient anti-icing which is not detected by the system. Ice accretion on the wing might then occur and might jeopardize the aircraft flight performance and safety.

This Directive requires repetitive inspection of the subject hoses or placarding the
cockpit and prohibition from operating the aircraft under certain conditions.

FMI: http://casa.gov.au/airworth/airwd/NEW/urgent.htm