Magnetic Compass; Engine Oil Pressure Gauge - THRUSH S2R – G10 Maintenance Manual

AIRCRAFT MAINTENANCE MANUAL
INSTRUMENT TROUBLE SHOOTING CHART, Table 8-1, Page 2
PROBLEM
Hands oscillate.
Excessive card
error
Excessive card
oscillation
Card element
not level,
sluggish
Liquid leakage
from case
Gauge has
erratic operation
8-14
Page
THRUSH AIRCRAFT, INC – MODEL S2R-G10
ALTIMETER (Continued)
PROBABLE CAUSE
Static pressure irregular.
Leak in airspeed or
vertical speed indicator
installations.

MAGNETIC COMPASS

Compass not properly
compensated
External magnetic
interference
Insufficient liquid
Excessive vibration of
compass
Compass excessively
compensated
Leaking float chamber
due to broken cover glass
or case, or defective
sealing gaskets, weak or
detached card magnets,
pivot friction, or broken
jewel

ENGINE OIL PRESSURE GAUGE

Worn or bent movement
Dirty or corroded
movement
Pointer bent and rubbing
on dial, dial screw or
glass
REMEDY
Check lines for obstructions or leaks.
Check static source. Blow out lines,
tighten connections. Clean static
source.
Check other instruments and system
plumbing for leaks and obstructions.
Blow out lines, tighten connections.
Swing compass and compensate.
Locate and eliminate interference.
Replace compass.
Remove cause of vibration.
Back compensating screws off to
remove all compensation, then re-
compensate compass.
Replace compass.
Replace instrument.
Replace instrument.
Replace instrument.
Effective: 03/26/2010