Section 3
Emergency Procedures
Columbia 400 (LC41-550FG)
RC050002
Initial Issue of Manual: November 10, 2004
3-16
Latest Revision Level/Date: -/11-10-2004
3.2. Alternator Annunciator Light On
If after recycling the system the alternator
annunciator light does not go out or trips the alternator off-line again, follow steps 4 - 6
below.
4. Affected Alternator Master Switch
SET TO OFF
5. Crosstie Switch
SET TO ON
6. Good Alternator
ENSURE PROPER OPERATION (If the “Alt Off” annunciator is
illuminated, reduce loads or increase RPM until the annunciator goes off and the batteries
are in a charging state.)
7. If electrical system is not restored, land as soon as practicable.
LEFT OR RIGHT BUS FAILURE/CROSSTIE DISCHARGES WORKING BUS
(Activating the crosstie switch causes the ammeter of the working bus to discharge significantly,
e.g., the left bus was showing a positive charge prior to activating the crosstie switch)
1. Crosstie Switch
SET TO OFF
2. Master Switch of the failed bus
SET TO OFF
3. Review the following table for items that are on the failed bus and make appropriate
allowances.
ITEMS UNAVAILABLE WITH A BUS FAILURE
Left Bus Items
Right Bus Items
Aileron Trim
Pitot Heat
SpeedBrakes
Engine Instruments
Carbon Monoxide Detector
Oxygen
Position Lights
Landing Light
Left Voltage Regulator
Clock and Cabin Fan
Strobe Lights
Taxi Light
Right Voltage Regulator
Door Seal
Power Point
Elevator Trim
4. Depending on which bus failed (left or right) and the dictates of the current conditions, i.e.,
day, night, IMC, VMC, land the airplane as soon as practicable or possible.
RUNAWAY TRIM
(sudden and unexplained changes in control stick force)
1. Trim Tab System ON/OFF Switch
SET TO OFF TO DISABLE THE SYSTEM
2. Power Settings
REDUCE TO 50% BHP OR LESS (Or to a setting that relieves forces)
3. Airspeed
100 to 110 KIAS (Or to speed that relieves forces)
4. Circuit Breakers
PULL BOTH TRIM BREAKERS TO THE OFF POSITION
5. Flight
TERMINATE AS SOON AS PRACTICABLE OR POSSIBLE (This depends on
the magnitude of control force(s) required to maintain a normal flight attitude.)
6. Landing
PREPARE FOR CONTROL FORCE CHANGES (When power is reduced and
airspeed decays, there can be substantial changes in the required control pressures.)
WARNING
In a runaway trim emergency the two most important considerations are to
(1)
IMMEDIATELY turn off the trim system and (2) maintain control of the
airplane. The airplane will not maintain level flight and/or proper directional