S 014-005
(4)
Open the mid lower strut aft access door on the strut left side.
S 014-037
(5)
On inboard engines, open the mid lower strut aft access door on the strut right side.
S 014-036
(6)
On the outboard engines, open the forward lower midspar pressure relief access door on the strut right side (AMM 06-09-09/201).
S 034-006
(7)
Disconnect the electrical connector (3) from the PRSOV (1):
(a)
DV83 - PRSOV ENGINE 1
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747-400 MAINTENANCE MANUAL
(b)
DV85 - PRSOV ENGINE 2
(c)
DV86 - PRSOV ENGINE 3
(d)
DV87 - PRSOV ENGINE 4
S 034-007
(8)
Disconnect the bonding jumper (2) from the PRSOV (1).
S 034-008
(9)
Disconnect the two tubes (6 and 7) from the PRSOV (1).
S 034-009
(10)
Remove the couplings (4) from the PRSOV (1).
S 024-038
CAUTION: DO NOT HOLD THE TEMPERATURE SENSOR PROBE OF THE PRSOV DURING
_______ THE PRSOV REMOVAL OR INSTALLATION. DAMAGE TO THE PROBE COULD OCCUR.
(11)
Remove the PRSOV (1) through the left access door.
S 034-011
(12)
Remove the seals (5) from the duct flanges.
S 034-012
(13)
Put covers on the open ducts to keep out unwanted objects.
S 034-013
(14)
If you must replace the PRSOV (1) with a new PRSOV, remove these parts from the used PRSOV:
(a)
Remove the elbows (8 and 11), jam nuts (9 and 12), and O-rings (10 and 13) from the precooler pressure sense port and the downstream pressure sense port.
(b)
Discard the O-rings.
(c)
Remove the ground stud (20) from the PRSOV.
TASK 36-11-04-404-035
3. The PRSOV Installation (Fig. 401)
______________________
A. Consumable Materials
(1)
D01062, Never-Seez, Pure Nickel Special, NSBT-8N
(High temperature anti-seize compound)
(2)
D00062 - Lubricant, Pneumatic System Thread, FS 1292 (Fluor-Silicone) MIL-G-4343
(3)
G00095 - Detector, - Leak, Leak-Tek (160X)
B.
References
(1)
AMM 06-09-09/201, Nacelle and Engine-to-Wing Fairing Access Doors and Panels
(2)
AMM 20-11-15/401, Bonding Jumpers and Ground Leads
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MAINTENANCE MANUAL
(3)
AMM 20-22-01/601, Electrical Bonding
(4)
AMM 24-22-00/201, Manual Control
(5)
AMM 36-00-00/201, Pneumatic System
(6)
AMM 71-00-00/201, Power Plant
C. Access
(1)
Location Zone
452 Engine 1 - Strut Torque Box
462 Engine 2 - Strut Torque Box
472 Engine 3 - Strut Torque Box
482 Engine 4 - Strut Torque Box
(2)
Access Panel 452FL Access Door, Mid Lower Strut Aft - Engine 1 452ER Access Door, Forward Lower Midspar Pressure Relief -
Engine 1 462FL Access Door, Mid Lower Strut Aft - Engine 2 462ER Access Door, Mid Lower Strut Aft - Engine 2 472FL Access Door, Mid Lower Strut Aft - Engine 3 472ER Access Door, Mid Lower Strut Aft - Engine 3 482FL Access Door, Mid Lower Strut Aft - Engine 4 482ER Access Door, Forward Lower Midspar Pressure Relief -
Engine 4
D. Procedure
S 434-015
(1)
If it is necessary, install the fittings on the PRSOV (1):
(a)
Apply the lubricant to the new O-rings (10 and 13).
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本文链接地址：747-400 AMM 飞机维护手册 气动系统 PNEUMATIC SYSTEM(84)
