Exhaust Gas Temperature Gauge Troubleshooting - Piper PA-44-180 SEMINOLE Maintenance Manual

TROUBLESHOOTING EXHAUST GAS TEMPERATURE GAUGE.
Trouble
Gauge inoperative.
Fluctuating reading.
REMOVAL AND REPLACEMENT OF GAUGE. (Refer to Figure 77-1.)
1. Disconnect and label the wires from the EGT gauge at the instrument panel.
2. Remove the three bolts (*four screws) securing the instrument to the panel.
3. Install the gauge by reattaching the cables to their appropriate terminals.
* Referenced PA-44-180 S/N 44-95001 and up.
EXHAUST GAS TEMPERATURE PROBE.
REMOVAL OF EGT PROBE (PA-44-180).
1. Disconnect the lead cable from the rear of the instrument and remove it through the aircraft to the engine.
2. Cut the safety wire at the probe clamp and remove the probe from the number one cylinder exhaust.
PIPER AIRCRAFT
PA - 4 4 - 1 8 0 / 1 8 0 T
AIRPLANE MAINTENANCE MANUAL
CHART 7704. EXHAUST GAS TEMPERATURE
Cause
Master Switch OFF.
Circuit Breaker OUT.
Defective gauge, probe
or wiring.
Adjusting potentiometer
turned off scale.
Loose, frayed or broken
electrical leads or faulty
connections.
3H14
Remedy
Turn switch ON.
Push breaker IN.
Check probe and lead
wires for chafing, breaks
or shorting between wires
and/or metal structure.
Reset potentiometer.
Clean and tighten connections.
Repair or replace defective
leads.
7 7 - 3 2 - 0 2
Page 77-12
Revised: May 15, 1989