Table of Contents
Advertisement
MODEL 182 & T182 SERIES SERVICE MANUAL
14-75.
CONTROL SURFACE DISCHARGERS.
may be purchased from the following source:
James G. Biddle Co
14-76.
DESCRIPTION.
Wick type static dischargers
Plymouth Meeting, Pa., 19462
may be installed on the trailing edge surfaces of the
ailerons. elevators and rudder of the aircraft.
One
Perform the following resistance checks:
type discharger is fabricated with the wick and the
1. If the wick and base of the static discharger
base combined into an integral unit; in the other type,
are combined, the resistance from the base of the
the wick is attached to the base by a threaded fitting,
discharger to a good aircraft ground should check 2. 5
and may be replaced without removing the base from
milliohms maximum.
the aircraft.
The installation of static dischargers
2.
If the wick can be separated from the base,
reduces the build-up of static electricity on the air-
the resistance from the base to the airframe should
frame as a consequence of flying through haze, dust,
check 1. 0 ohm maximum. In the preceding steps,
rain, snow or ice crystals. In some cases, if dis-
establish a good ground before proceeding to step 3.
chargers are not installed. or not functioning as a
3. Connect the EARTH terminal of the megohm-
result of age or repeated exposure to static electricity,
meter to the base of the discharger and check the
static build-up can result in the loss of usable radio
resistance at the tip of the wick.
The resistance
signals on all communication and navigation equip-
should check 1. 0 to 100. 0 megohms. This check
ment.
Whenever static dischargers are installed, re-
applies to either type of static discharger.
If the
placed, and at regular intervals during their service
resistance of the wick checks less than 1. 0 or more
life, resistance checks should be performed to deter-
than 100. 0 megohms, the wick should be replaced.
mine their effectiveness in reducing static build-up.
14-77.
RESISTANCE CHECK. Since static discharg-
ers lose their effectiveness with age and exposure to
DO NOT BEND the wick during this check
static electricity, they should be checked with a 500
since wicks have a higher resistance if
to 1000 volt capacity megohmmeter every 500 hours
bent.
or annually, whichever occurs first. Megohmmeters
14-33/(14-34 blank)
Advertisement
Table of Contents
Troubleshooting
