TM 1-1510-225-MTF
A7.
Engine fails to or is slow to accelerate propeller to
idle speed.
a. Propeller oil transfer sleeve binding.
TROUBLESHOOTING GUIDE B - INSTRUMENTS
CONDITION
B1.
B2.
B3.
B4.
B5.
PROBABLE CAUSE
Airspeed indicator reading remains fixed.
a. Pitot pressure line clogged with ice or debris.
b. Defective indicator.
Vertical speed indicator inaccurate or Inoperative.
a. Static line clogged.
b. Leak in line or instrument case or loose fittings.
c. Defective indicator.
Airspeed Indicator reads incorrectly or fluctuates
excessively.
a. Pitot tube or pressure line partially restricted or
leaking.
b. Static port or line clogged or static line leaking.
c. Defective indicator.
Magnetic compass inaccurate, sluggish, or erratic.
a. Insufficient liquid.
b. External magnetic interference.
c. Defective compass.
d. Windshield heat on.
e. Air conditioner on.
f. Sun visors not stowed outboard.
g. EFIS power switches on.
Turn-and-slip indicator inoperative or erratic.
a. No electrical power.
b. Defective turn-and-slip indicator.
3-3
