F. Put the Airplane Back to Its Usual Condition
S 866-561
(1)
Release the pressure in hydraulic system No. 4 (AMM 29-11-00/201).
S 086-562
(2)
If you used the system demand pump for a pressure source, remove the flowmeter:
(a)
Remove the flowmeter from the pressure line on the demand pump.
(b)
Connect the pressure line to the pressure port on the demand pump.
(c)
Put the system HYD PUMPS DEMAND switch on the P5 overhead panel in the ON position.
(d)
Examine the pressure port connection on the demand pump for leakage.
(e)
Put the system HYD PUMPS DEMAND switch in the OFF position.
(f)
Repair the cause of any leakage from the pressure connection on the demand pump.
S 086-563
(3)
If you used a hydraulic service cart for a pressure source,
disconnect the hydraulic service cart:
(a)
Disconnect the pressure line on the hydraulic service cart from the system No. 4 pressure module.
(b)
Disconnect the return line on the hydraulic service cart from the system No. 4 return module.
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
29-11-00
ALL ú ú 01 Page 618 ú Oct 18/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
S 616-710
(4)
Service the Hydraulic reservoir (AMM 12-12-01/301).
S 216-564
(5)
Examine the doors on the trailing edge fairing.
(a)
Examine the door latches on the trailing edge fairing for cracks and wear.
(b)
Make sure that all latch assemblies are installed.
(c)
Repair and adjust the latches if it is necessary (AMM 54-62-03/501).
S 416-565
CAUTION: MAKE SURE YOU LATCH THE FAIRING DOORS ON THE TRAILING EDGE
_______ CORRECTLY. DAMAGE CAN OCCUR IF THE DOORS OPEN DURING A FLIGHT.
(6) Close the doors on the trailing edge fairing (AMM 54-62-00/201).
TASK 29-11-00-796-001
6. Hydraulic System No. 1 - Full Internal Leakage Check
____________________________________________________
A. Special Tools and Equipment
(1)
4MIT65B80307- 1 - Protractor
(2)
3MIT65B80307-1 - Control Wheel Adapter
B.
Standard Tools and Equipment
(1)
410DME-10AR Flowmeter (commercially available)
ACL Technologies Inc.
Santa Clara, CA 92705-5419
-
It must be able to pass a flow of 32 gpm at 3000 psig without damage.
-
It must measure a flow of 0.25 to 7.50 gpm with a precision of | 0.5% of the reading.
(2)
Hydraulic Service Cart - 0 to 3000 psi with hydraulic fluid, fire-resistant, BMS 3-11
C.
References
(1)
AMM 24-22-00/201, Manual Control
(2)
AMM 27-51-00/201, Trailing Edge Flap System
(3)
AMM 29-11-00/201, Main Hydraulic Supply System
(4)
AMM 29-11-23/201, Pressure Filter Module
(5)
AMM 32-00-30/201, Landing Gear Doors
(6)
AMM 54-62-00/201, Nacelle Strut Access Panels
(7)
AMM 54-62-02/501, Nacelle Strut Access Doors
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
29-11-00
ALL ú ú 01 Page 619 ú Jun 18/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL
(8)
AMM 54-62-03/501, Trailing Edge Fairing Doors
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