Repairs of flexible ducts made of
chloroprene shall be made with
adhesive, NSN 8040-00-390-7960 (P/N
Bostick 4006A and 4006B) utilizing
fiberglass cloth. Repairs will be
accomplished in a well-ventilated
9-14. Deicing Systems. Pneumatic deicing systems
use rubber deicers, called boots or shoes, attached to
the leading edge of the wing and stabilizers. The deicers
are composed of a series of inflatable tubes. During
operation, the tubes are inflated with pressurized air,
and deflated in an alternating cycle as shown in figure 9-
31. This inflation and deflation causes the Ice to crack
and break off. The ice is then carried away by the
a. Deicing System Precautions. Exercise the
following precautions to assure maximum service life of
Repair all damage promptly.
Keep deicer shoes free of oil, gasoline, paint
Clean deicer shoes, using a mild soap, A-A-
50, and water solution not exceeding 180 °F
Do not rest ladders of work stands against
leading edges having deicer shoes installed.
Wrap padding around those portions of work
stands which could come in contact with
installed deicer shoes.
Do not drag fuel or oil servicing hoses over
the deicer shoes.
Do not walk or lay tools and objects on upper
stretch area of shoes. Deicer shoes, when
installed, are under tension and therefore
readily susceptible to abrasion.
Protect deicer shoes from abuse.
Figure 9-31. Delcer Boot Inflation Cycle
Deicing System Preventive Maintenance.
Preventive maintenance for deicing systems will entail
the following procedures:
Do not use excessive amounts of
methyl ethyl ketone, as this product
tends to soften rubber.