S 865-151
(43)
Remove electrical power, if it is not necessary (AMM 24-22-00/201).
TASK 29-21-00-735-213
5. Alternate System Test - RAT Hydraulic Pump and Drive System (Fig. 501)
___________________________________________________________
NOTE: This procedure should only be used if a hydraulic cart is not
____
available.
A. The following procedure may be used to operate both center ACMP's with a single electrical power source.
NOTE: Usually, C2 ACMP will not operate with a single electrical
____ power source on the aircraft. This alternate procedure installs a temporary jumper in the control circuit to allow C2 ACMP to operate with a single electrical power source on the aircraft.
S 865-157
CAUTION: TO PREVENT POSSIBLE ELECTRICAL OVERLOAD, THE LEFT AND RIGHT
_______ HYDRUALIC SYSTEM ACMP'S MUST NOT BE OPERATED AT THE SAME TIME THE RAT IS BEING TESTED.
(1)
Select all 4 ACMP control switches to OFF.
S 865-208
(2)
Open and tag the following circuit breakers:
(a)
11K, ELEC HYD Control L
(b)
11K16, ELEC HYD PUMP Control R
(3)
Remove electrical power from airplane (AMM 24-22-00/201).
S 865-209
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
29-21-00
ALL ú ú 08 Page 522 ú Sep 28/00
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
757 MAINTENANCE MANUAL
S 015-214
(4)
Get access to the main equipment center through the electronics access door 119BL.
S 215-211
(5)
Locate the ELEC HYD C1 ELCU (M10006), on the P31 panel.
S 025-210
(6)
Remove D2934 connector from M10006 ELCU.
S 425-220
(7)
Install a suitable jumper between pins 5 and 6 on connectors D2934 at the M10006 ELCU. The jumper, consisting of a short wiring harness to be installed beteen connector D2943 and the M10006 ELCU, can be assembled as follows:
Assemble a jumper harness of appropriate length using equivalent connetors and wires to match gage material and location of existing harness, except connect locations 5 and 6 (on the back side of the connector that will mate to D2934, pins 5 and 6) with an appropriate wire.
S 865-215
(8) Supply electrical power to the airplane (AMM 24-22-00/201).
TASK 29-21-00-735-216
6. Continue with the RAT system test:
A. General
CAUTION: DO NOT OPERATE THE LEFT OR RIGHT ACMP DURING RAT SYSTEM SPIN-UP
_______
TEST.
(1) Obey this CAUTION for the following steps:
B. Equipment
(1)
RAT Safety Screen - B29001-42
(2)
RAT Safety Screen Adapter - B29001-23
(Necessary when lifting fixture - A71015 is
used).
ú (3) Lifting Fixture - A71015-87; Hein-Werner Model 74; or Black Hawk Model 67554
(4)
Lifting Fixture - PM 81782/B
(5)
RAT Circuit Breaker Lock Set - B27065-9 or
Equivalent
(6)
Stroboscopes (optional):
(a) Digital Stroboscope - Type 4913
Bruel and Kjaer Instruments, Inc.
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