Raytheon Beechcraft Bonanza 35 Series, Руководство по ремонту

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BONANZA 35 SERIES SHOP MANUAL
Page 1
B21 Aug 29/03
Section 7
700700700
SCHEDULED MAINTENANCE CHECKS
ELECTRIC PROPELLER DEICER SYSTEM INSPECTION GUIDE
50-HOUR INSPECTION
The various components of the deicer system should be inspected periodically for incipient defects. The purpose of
the following inspection is to provide a means for detecting and correcting such defects before they render the
system inoperative.
a. Lock the brakes and operate the engines at near take-off power. Turn the deicer system switch ON and observe
the ammeter for at least 2 minutes. If the ammeter needle does not rest within the shaded band, except for a
flicker at 30-second intervals when the step switch of the timer cycles, refer to the troubleshooting chart for the
probable source of trouble.
Before moving the propeller, make certain that the ignition switch is off and that the engine
has cooled completely. There is always some danger of a cylinder firing when a propeller is
moved.
While following the instructions of step b, move the propeller back and forth to prevent arcing
between the brushes and the slip ring.
b. With the engine shut off, turn the deicer switch ON and feel the deicer boots on the propeller for the proper
sequence of heater operation. The presence of local hot spots indicate severe damage to the deicer heaters,
which should be repaired before more serious damage develops.
c. Remove the spinner dome and open all access doors pertaining to the wiring and components of the deicer
system. Turn the deicer switch ON and station an assistant in the airplane to observe the ammeter. Flex all
accessible wiring, particularly the lead straps, leads from the slip ring assembly, and the firewall electrical
connectors and their wiring. Any movement of the ammeter, other than the cycling flicker that occurs at 30-
second intervals, indicates a short or open circuit that must be located and corrected.
d. To extend the life of the lead strap between the hub clamp and clip, reposition the bend in the strap at a point
at least 1/2 inch from the existing location of the bend.
e. Check for damaged brush rods or springs and for worn or damaged brushes.
100-HOUR INSPECTION
a. Repeat the 50-hour inspection.
b. Check for radio noise or radio compass interference by operating the engine at near take-off power with the
radio gear turned on. If, under these conditions noise or interference occurs when the deicer switch is ON and
disappears when the switch is OFF, refer to the troubleshooting chart for the probable source of trouble.