Piper SEMINOLE PA-44-180, Maintenance Manual

Page: 725 / 881

TROUBLESHOOTING EXHAUST GAS TEMPERATURE GAUGE.
CHART 7704. EXHAUST GAS TEMPERATURE
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.
Trouble Cause Remedy
Gauge inoperative. Master Switch OFF. Turn switch ON.
Circuit Breaker OUT. Push breaker IN.
Defective gauge, probe Check probe and lead
or wiring. wires for chafing, breaks
or shorting between wires
and/or metal structure.
Adjusting potentiometer Reset potentiometer.
turned off scale.
Fluctuating reading. Loose, frayed or broken Clean and tighten connections.
electrical leads or faulty Repair or replace defective
connections. leads.
PA - 4 4 - 1 8 0 / 1 8 0 T
AIRPLANE MAINTENANCE MANUAL
7 7 - 3 2 - 0 2
Page 77-12
Revised: May 15, 1989
3H14
PIPER AIRCRAFT