THRUSH AIRCRAFT, INC – MODEL S2R-R1340
AIRCRAFT MAINTENANCE MANUAL
8-14
Effective: 01/01/08
INSTRUMENT TROUBLE SHOOTING CHART, Table 8-1, Page 3
ENGINE OIL PRESSURE GAUGE (Continued)
PROBLEM PROBABLE
CAUSE
REMEDY
Pressure line clogged
Check line for obstructions. Clean line.
Leak in pressure line
Check line for leaks and damage.
Repair or replace damaged line.
Pressure line broken
Check line for leaks and damage.
Repair or replace damaged line.
Pointer loose on staff
Replace instrument.
Gauge does not
register
Damaged gauge
movement
Replace instrument.
Gauge pointer
fails to return to
zero
Foreign matter in line
Check line for obstructions. Clean line.
Gauge does not
register properly
Faulty mechanism
Replace instrument.
ENGINE FUEL PRESSURE GAUGE
Gauge
inoperative or
erratic. Low
pressure or flow
registered.
Restricted, broken or
leaking line
Clear and clean line. Tighten fittings or
replace, if necessary.
Vapor in fuel line
Start and run engine until instrument
registers normally.
Fuel pressure or
fuel flow
registered is
high, low or
erratic
Faulty relief valve in
engine-electric driven
pump(s) or defective
pump(s)
See fuel pump in Power Plant Section
for replacement or relief valve
adjustment instructions.
TACHOMETER
Tachometer
generator/tachometer
defective
Test generator for output. Overhaul or
replace if necessary. Test instrument
and replace, if necessary.
Tachometer
registers low,
erratically, or no
reading.
Tachometer generator
shaft sheared
Replace tachometer generator.
