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Old 6th February 2004 | 00:27
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Ice-bore
 
Joined: Feb 2004
Posts: 24
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From: West London
Deicing fluids

Not aware of a definitive list of approved A/C de-/anti-icing fluids. However, Transport Canada do list the fluids that currently meet both the aerodynamic and anti-icing performance requirements, detailed in the latest versions of SAE AMS 1424 (Type I) and AMS 1428 (Type II and IV), in Table 5-1, 5-2 and 5-4 at:

http://206.222.76.45/tables/HOT_2003-04E.pdf

The majority of these fluids will also meet the materials compatability requirents, defined in the above specs. However, this aspect was not addressed by TC and confirmation that a fluid is fully approved would need to be obtained from the fluid manufacturer.

FCY-1A, a fully approved Type I fluid, is available in PEK and may also be available at other Station within China. Should the fluid in question be on the TC list, would suggest the holdover time tables published by the AEA (link provided by safetypee) be used.

In the event that the fluid does not meet/has not been tested to either of the above specs, it is most unlikely that it will have been approved by the A/C manufacturer for use on his aircraft.........

Should 'emergency' use of such a fluid be contemplated, would suggest that the user would need to establish a). that it is not a 'thickened' fluid (if 'thickened' unlikely to have been tested for aerodynamic performance, therefore what proof exists to guarantee that it will flow-off the critical surfaces prior to rotation?) b). the freezing point of the fluid mix used (must be at least 10 degrees C below the OAT) c). that during active freezing/frozen precipitation the de-icing operation can be carried out at or near the end of the active R/W, i.e. de-ice and go (holdover time generated by an 'unthickened' fluid is likely to be similar to that published for Type I fluid, i.e. minimal) d). that a 'post de-icing check' will be carried out by a competent person.
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