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Type II : SAE AMS 1428 standard

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Type IV : SAE AMS 1428C standard

17.11  Fluid Failure
17.11.1  While the HOT tables serve as a guideline for the crew to make the decision about the aircraft’s condition at take off, the crew are to monitor the condition of the fluid at all times to check if it is effective or it has failed. The fluid would be deemed to have failed at the end of the HOT period or at any time when the treated surfaces become less reflective and dulled, or appear white. The fluid turns opaque, ice crystals begin to form in the fluid or the wing or the critical surfaces start getting contaminated. At the first sign of failure the PIC is to return for another round of de/anti-icing.
Issue II 02.07.2009  Rev. 0

CREW PROCEDURES
18.1 General
This section addresses the issue of ground de-icing/anti-icing from the pilot’s point of view. The topic is covered in the order it appears on cockpit checklists and is followed through, step-by-step, from flight preparation to takeoff. The focus is on the main points of decision-making, flight procedures and pilot techniques.

18.2 On reaching the aircraft
18.2.1 When arriving at the aircraft, local advice from ground maintenance staff may be considered, because they may be more familiar with local weather conditions. If there is nobody available, or if there is any doubt about their knowledge concerning de-icing/anti-icing aspects, pilots have to determine the need for de-icing/anti-icing by themselves.
18.2.2 Checks for the need to de-ice/anti-ice are presented in Chapter 9 and the procedure for de-icing/anti-icing is given in Chapter 12 of this manual.
18.2.3 If the prevailing weather conditions call for protection during taxi, pilots should try to determine the off block time, to be in a position to get sufficient anti-icing protection regarding holdover time.
18.2.4 This requirement for de-icing should be passed on to the ATC during initial contact and de-icing/anti-icing units, ground maintenance, boarding staff, dispatch office and all other units involved should be notified.

18.3 Cockpit preparation
18.3.1 Before treatment, avoid pressurizing or testing flight control systems. Try to make sure that all flight support services are completed prior to treatment, to avoid any delay between treatment and start of taxiing.
18.3.2 During treatment observe that:
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Engines are shut down or at idle,

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APU may be used for electrical supply,

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All air bleeds are OFF,

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Flaps, slats, spoilers and speed brakes will normally be retracted

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Ailerons, rudders and elevators will normally be in their neutral position

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Relevant check lists shall be completed as required in case they cannot be completed due to de-icing procedures

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