76-12-02
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / PW4000 SERIES /747-400 / ENGINES/MAINTENANCE MANUAL ////////////////////////
S 765-015-N00
(17) Do a check of the autothrottle reset switch, S10.
(a) Make sure the switch does not operate at the mid-travel position: 1) Push and hold the disconnect lever of the No. 4 thrust
lever 0.10 inch (2.54 mm) forward, to the mid-travel position. 2) Make sure that there is no continuity through pin 33 and
34. 3) Release the disconnect lever.
(b) Make sure the switch operates at the full-travel position: 1) Push and hold the disconnect lever of the No. 4 thrust
lever all the way forward. 2) Make sure that there is continuity between pin 33 and 34. 3) Release the disconnect lever.
S 085-016-N00
(18)
Remove the ohmmeter from the connector junction, pins 33 and 34.
S 435-017-N00
(19)
Connect the connector, D41291 (WDM 34-61-13).
S 415-041-N00
(20)
Install the ceiling panels in the main passenger cabin (AMM 25-22-01/401).
TASK 76-12-02-825-018-N00
3. Go-Around Switch Check (Fig. 502)
______________________
A. Standard Tools and Equipment
(1)
Digital Multimeter - Range 0-50 |0.01 volts
RMS; Commercially
available
B.
References
(1)
AMM 24-22-00/201, Manual Control
(2)
AMM 25-22-01/401, Main Passenger Cabin Ceiling Panels
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
(3)
AMM 31-61-00/501, Integrated Display System
(4)
AMM 32-09-02/201, Air/Ground Relays
(5)
AMM 76-11-03/201, Control Stand
(6)
IPC 76-11-03
(7)
WDM 22-12-11
(8)
WDM 22-12-31
(9)
WDM 22-12-21
C. Access
(1) Location Zone
211/212 Main Passenger Cabin - Nose to First Door
221/222 Flight Compartment
D. Preconditions
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(1) These conditions are necessary for this task:
(a)
Electrical power on (AMM 24-22-00/201).
(b)
Integrated Display System serviceable (AMM 31-61-00/501).
(c)
Airplane must be in the Ground Mode (AMM 32-09-02/201).
E. Procedure
S 015-042-N00
(1)
Remove the ceiling panels in the main passenger cabin to get access
to the connector plugs below the control stand (AMM 25-22-01/401).
S 035-019-N00
(2)
Disconnect the connectors D41191 (WDM 22-12-11), D41291 (WDM
22-12-31), and D41292 (WDM 22-12-21).
S 865-020-N00
(3)
Make sure the auto go-around levers are fully up.
S 485-021-N00
(4)
Connect the ohmmeter to the connector D41191, pins 16 and 17.
S 765-022-N00
(5)
Do a check of the go-around lever, S1.
(a)
Make sure there is continuity between pin 17 and pin 16.
(b)
Make sure the switch does not operate at the mid-travel position: 1) Push and hold the go-around lever of the No. 2 thrust lever
0.10 inch (2.54 mm) down, to the mid-travel position. 2) Make sure that there is continuity between pin 17 and pin
16.
(c)
Push the go-around lever on the No. 2 thrust lever fully down.
(d)
Make sure there is no continuity between pin 17 and pin 16.
(e)
Release the go-around lever.
S 765-023-N00
(6) Do a check of the go-around lever, S2.
(a) Make sure there is continuity between pin 17 and pin 16.
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