AD/F100/93 - On-Ground Wing Leading Edge Heating System (Cth)

AIRWORTHINESS DIRECTIVE For the reasons set out in the background section, the CASA delegate whose signature appears below issues the following Airworthiness Directive (AD) under subregulation 39.001(1) of CASR 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.

Fokker F100 (F28 Mk 100) Series Aeroplanes AD/F100/93 On-Ground Wing Leading 3/2009 Edge Heating System

Applicability: F28 Mark 0070 and Mark 0100 aircraft, all serial numbers. Note 1: Aircraft with serial numbers 11496, 11518, 11562, 11566, 11567, 11568, 11571, 11572, 11575, 11579, 1581, 11582 and 11583 are known to have been delivered with an On-Ground Wing Leading Edge Heating System (OGWLEHS) installed, although this may have since been removed or deactivated. Requirement: Install an OGWLEHS in accordance with the Accomplishment Instructions of Fokker (Pro Forma) SBF100-30-018 or Revision 1 or later revision approved by the European Aviation Safety Agency (EASA) and the associated Appendix (identified by Roman numerals I through VIII) as applicable to aircraft serial number. Note 2: After modification of an aircraft as required this Directive, safe winter operation of the aircraft remains an operational responsibility. The system will certainly aid in keeping wing leading edges free of ice, frost and snow accumulation, but it does not replace the required procedures to prevent take-off with contaminated wings. Consequently, modification of the aircraft as required by this Directive does not relieve the operator from the responsibility to maintain the clean aircraft concept as required by regulation. This includes appropriate inspections whenever icing conditions exist, as well as the application of de-icing and/or antiicing fluids based on the decision logic in an approved winter operation program. When the aircraft is operated in accordance with the approved Aircraft Flight Manual (AFM), the actual use of wing leading edge heating on the ground may - only under certain specific conditions described in the AFM - relieve the operator of the requirement to perform a tactile inspection of the upper surface of the wing leading edge after treatment with de-icing and/or anti-icing fluid, as applicable. Note 3: In an operational environment where ground-icing conditions as defined in the AFM can be completely excluded over the full calendar year and the operator's complete operating network, the operator may consider submitting an application to obtain an exemption for the actions required by this Directive. Note 4: EASA AD 2009-0008 refers. Compliance: Within 24 calendar months after the effective date of this Directive.