Piper PA-28-161, Maintenance Manual

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PIPER AIRCRAFT, INC.
PA-28-161, WARRIOR III
MAINTENANCE MANUAL
PAGE 3
Nov 30/06 3J19
39-10-00
(2) Installation
NOTE: Inspect the front of the panel-mounted avionics tray/rack to verify it is not significantly
inset from the panel. If so, correct the tray/rack installation before proceeding.
NOTE: The high insertion forces required to seat a unit with “high density” connectors tend to
limit the effectiveness of the first seating attempt. Accordingly, the following procedure
requires sequential applications of force, and subsequent tightening of the jackscrew,
to ensure all connectors seat properly.
(a) Slide the avionics unit into the instrument panel rack and forward applying a moderate
insertion force.
(b) Insert an appropriate size (generally 3/32 inch) allen wrench into the jackscrew access
hole in the faceplate and tighten to remove any slack, but do not try to “pull” unit into place
with the jackscrew.
(c) Apply additional insertion force to front of unit.
(d) Tighten jackscrew again.
(e) Apply additional insertion force to front of unit.
(f) Finish tightening jackscrew.
(g) Ensure that unit bezel is “tight” against panel.
2. Circuit Breaker Panel
Circuit breakers are installed in the lower right instrument panel and are of the single hole mounting,
pushbutton type, with manual reset.
Should a circuit breaker be replaced or added, exercise extreme caution ensuring the breakers are in
proper mechanical alignment, any insulators that are called out are installed correctly, and all electrical
wiring and connections meet aviation standards. Do not deviate from the parts manual requirements
when replacing circuit breakers.
NOTE: This type of circuit breaker can be used as a method of turning a system on and off.
A. Removal
(1) Disconnect positive battery cable.
(2) Remove knurled nut from circuit breaker face plate on front of instrument panel.
(3) From behind instrument panel, disconnect electric bus bar from circuit breaker.
(4) From behind instrument panel, remove circuit protector from instrument panel.
NOTE: Record placement of electrical leads to aid installation.
(5) Disconnect electrical connections fastened with screws to circuit breaker.
B. Installation
(1) Check circuit breaker amperage is correct.
(2) Connect electrical leads to their proper screws on new breaker and secure.
(3) From behind instrument panel, insert circuit protector into its proper hole on instrument panel.
(4) From behind instrument panel, install electric bus bar to circuit breakers.
(5) Reconnect positive battery cable.