Engine Vibration-Monitoring System - BOMBARDIER Challenger 601-3A CL-600-2B16 Pilot Training Manual

ENGINE VIBRATION-
MONITORING SYSTEM
General
An engine vibration-monitoring system con-
tinuously monitors the vibration level of each
engine and provides cockpit indication of
these levels. A warning system alerts the crew
if predetermined levels are exceeded.
Components—AC 5001-5104
A transducer mounted on the compressor cas-
ing of each engine generates an electrical sig-
nal proportional to the intensity of the engine
vibration. The generated signal is sent to a
signal conditioner and then transmitted to a
dual needle, dual-scale indicator (Figure 7-22)
on the pilot's side console. The indicator is cal-
ibrated in mils from 1 through 4.
An amber HIGH VIBration switchlight (Figure
7-22) near the indicator will illuminate in con-
junction with the pilot's master caution system
if the vibration level of either engine exceeds the
permissible limits for more than 3 seconds.
The 3-second time delay eliminates nuisance
warnings due to high transient engine vibration.
VIB
4 4
3 3
2 2
1 1
0 0
MILLS
D.A.
L R
Figure 7-22. Engine Vibration-Monitoring
Panel (AC 5001-5104)
CL-600-2B16 PILOT TRAINING MANUAL
ENGINE
VIBRATION
HIGH
VIB
PRESS
TO
TEST
FOR TRAINING PURPOSES ONLY
FlightSafety Canada
Testing
The vibration indicating system can be tested
by pressing and holding the HIGH VIBration
switchlight. The needles will show a vibration
level of 4.0 mils DA and after 3 seconds, the
amber HIGH VIB light will illuminate accom-
panied by the ENGINE annunciator and flash-
ing MASTER CAUTION lights.
NOTE
The test system does not test the en-
gine-mounted transducers or cable
circuitry. The indicator needle re-
sponse following engine starting in-
dicates proper operation of the system.
Components—AC 5105
and Subsequent
A transducer mounted on the compressor cas-
ing of each engine generates an electrical sig-
nal proportional to the intensity of the engine
vibration. The generated signal is sent to the
cockpit indicator, for fan vibration only. If
fan vibration exceeds 2.7 mils DA for more
than 3 seconds, an amber FAN annunciator
will also come on, accompanied by an EN-
GINE master caution light. If core vibration
exceeds 1.7 mils DA for more than 3 seconds,
only the amber CORE annunciator will come
on plus an ENGINE master caution light but
no needle deflection occurs on the vibration
indicator (Figure 7-23).
The 3-second time delay eliminates nuisance
warnings due to high transient engine vibration.
Each engine has their own CORE and FAN an-
nunciator lights.
Test
The vibration indicating system can be tested
by pressing and holding in each of the CORE
and FAN indicator switchlights on the EVM
indicator panel; in turn, the pointer on the
L t ée
L t d.
CL 601-3A 7-25