0
100
40 60
80
20
NH
RPM
EXTERNALLY
REPLACEABLE
LAMPS
2 PLACES
UNLIT BLUE DOT
AT TEST VALUE
105.0% NH
PRESS TO TEST
PUSH BUTTON
NH SPEED INDICATOR
A
A
B
C
5V DC LIGHTING
P1
LIGHTING GROUND
ENG 1NH IND
5
(H5)
28VDCL ESS BUS
E
3
4
2
1
5
P5
F
G
SIGNAL
SIGNAL RETURN
R
n
PART OF ENG 1 HARNESS
CONNECTOR
7700−P4
H
J
K
L
M
N
P
HI
LO
COIL 2
COIL 1
ECU OUTPUT
A
B
9811−P104
RECEPTACLE
OUTPUT TO
FLIGHT DATA
RECORDER
Circuits shown for engine no. 1.
Engine no. 2 circuits similar.
Ident code is 7711, unless
otherwise indicated.
NOTE
NH SENSOR
(MAGNETIC PICK−UP)
P5
B
A
B
D
POWER GROUND
5
28VDCL SEC BUS
1
U
S1
NO
28VDC
TO AUTO RELIGHT
CTRL RELAY
2
1
2
PRE MOD 8−1/1101)
MODSUM 8Q100813.
1
HIGH PRESSURE
COMPRESSOR ROTOR
SPEED (NH) SENSOR
HIGH PRESSURE
COMPRESSOR
ROTOR SPEED (NH)
INDICATOR
dam01_7712112_001.cgm, cg, 10/07/03
D
SERIES 100
AIRCRAFT MAINTENANCE MANUAL
NH INDICATION CALIBRATION CHECK
Figure 201
MASTER
EFFECTIVITY: See Pageblock 77−12−11 page 201
77−12−11
Page 202
Dec 20/2004