5.
Push LSK 4L (<73 EPCS). Make sure the TRA readout shows on the EICAS auxiliary display.
Thrust Lever Position/EICAS TRA Readout
Figure 212 (Sheet 1)
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EICAS EPCS MAINTENANCEFORWARD THRUST LEVER PAGE THRUST RESOLVERANGLE (TLA) ANGLE READOUT (TRA)IN DEGREES
IN DEGREES (|0.8 DEGREES)
0
35.0 2
37.1 4
39.1 6
41.2 8
43.2 10
45.2 12
47.2 14
49.2 16
51.1 18
53.1 20
55.0 22
56.9 24
58.9 26
60.8 28
62.7 30
64.6 32
66.5 34
68.4 36
70.4 38
72.4 40
74.4 42
76.4 44
78.5 46
80.7 48
82.8 50
85.2
FORWARD THRUST LEVER/EICAS TRA READOUT
TABLE A
Thrust Lever Position/EICAS TRA Readout
Figure 212 (Sheet 2)
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A
747-400
MAINTENANCE MANUAL
EICAS EPCS REVERSE THRUST LEVER
MAINTENANCE ANGLE (TLA)
PAGE THRUST RESOLVER IN DEGREES
ANGLE READOUT (TRA)
IN DEGREES
(|0.8 DEGREES)
35.0 2
0
35.1 4
35.2 6
35.2 8
35.1 10
35.0 12
34.8 14
34.6 16
34.3 18
34.0 20
33.7 22
33.2 24
32.8 26
32.3 28
31.7 30
31.1 32
30.5 34
29.9 36
29.2 38
28.4 40
27.7 42
26.9 44
26.0 46
25.3 48
24.4 50
23.5 52
22.6 54
21.7 55
21.2 56
20.8 58
19.8 60
18.9 62
17.9 64
16.9 66
15.9 68
15.0 70
14.0 72
13.1 74
12.1 76
11.2 78
10.2 80
9.3 82
8.4 84
7.5 86
6.6 88
5.7
89.25
5.2
REVERSE THRUST LEVER/EICAS TRA READOUT
TABLE B
Thrust Lever Position/EICAS TRA Readout
Figure 212 (Sheet 3)
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(2)
AIRPLANES WITHOUT SYNC LOCKS; All the switches in the microswitch pack assembly are operated as a pair for each thrust lever by a beveled plunger assembly. You only have to adjust the plunger for one microswitch to get the correct adjustment for the pair of switches. But you must do a continuity check of each microswitch separately to make sure it works correctly.
(3)
AIRPLANES WITH SYNC LOCKS; All the switches in the microswitch pack assembly are operated in sets of three for each thrust lever by a beveled plunger assembly. You only have to adjust the plunger for one microswitch to get the correct adjustment for the set of microswitches. But you must do a continuity check of each microswitch separately to make sure it works correctly.
(4)
AIRPLANES WITHOUT SYNC LOCKS; The steps that follow are a general adjustment procedure for the switch pair.
(5)
AIRPLANES WITH SYNC LOCKS; The steps that follow are a general adjustment procedure for the switch set.
(a)
Loosen the jamnut on the plunger.
(b)
Turn the plunger in or out of the sleeve until you get the correct adjustment.
(c)
Tighten the jamnut to attach the plunger at the correct adjustment.
(6)
You can read the thrust lever angle from the EICAS EPCS maintenance page when you do not have a digital thrust lever protractor. But, you are recommended to find the thrust lever angle with the thrust lever protractor.
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