Engine Fuel Pressure Gauge; Tachometer - Thrush Aircraft S2R-R1340 Maintenance Manual

THRUSH AIRCRAFT, INC – MODEL S2R-R1340
INSTRUMENT TROUBLE SHOOTING CHART, Table 8-1, Page 3
PROBLEM
Pressure line clogged
Leak in pressure line
Gauge does not
Pressure line broken
register
Pointer loose on staff
Damaged gauge
movement
Gauge pointer
fails to return to Foreign matter in line
zero
Gauge does not
Faulty mechanism
register properly
Gauge
inoperative or
Restricted, broken or
erratic. Low
leaking line
pressure or flow
registered.
Vapor in fuel line
Fuel pressure or
fuel flow
Faulty relief valve in
registered is
engine-electric driven
high, low or
pump(s) or defective
erratic
pump(s)

Tachometer

Tachometer
generator/tachometer
registers low,
defective
erratically, or no
Tachometer generator
reading.
shaft sheared
8-14
AIRCRAFT MAINTENANCE MANUAL
ENGINE OIL PRESSURE GAUGE (Continued)
PROBABLE CAUSE

ENGINE FUEL PRESSURE GAUGE

TACHOMETER
REMEDY
Check line for obstructions. Clean line.
Check line for leaks and damage.
Repair or replace damaged line.
Check line for leaks and damage.
Repair or replace damaged line.
Replace instrument.
Replace instrument.
Check line for obstructions. Clean line.
Replace instrument.
Clear and clean line. Tighten fittings or
replace, if necessary.
Start and run engine until instrument
registers normally.
See fuel pump in Power Plant Section
for replacement or relief valve
adjustment instructions.
Test generator for output. Overhaul or
replace if necessary. Test instrument
and replace, if necessary.
Replace tachometer generator.
Effective: 01/01/08