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POST SB 737-27-1253
27-21-91
Config 2
Page 402
Oct 10/2007
D633A101-GUN
BOEING PROPRIETARY - Copyright#Unpublished Work - See title page for details
SUBTASK 27-21-91-020-013-002
CAUTION: MAKE SURE THAT YOU HOLD THE MAIN RUDDER PCU [1] DURING THE REMOVAL
OF THE FORWARD MANIFOLD [11]. THE PCU CAN FALL. THIS CAN CAUSE DAMAGE
TO THE MAIN RUDDER PCU [1].
(4) Remove the nut [27], washer [26], nut [25], washer [24], washer [34], bushing [23], and bolt
assembly [22] to disconnect the forward manifold [11] from vertical fin structure.
SUBTASK 27-21-91-480-006-002
(5) Install the lock, SPL-1727 to hold the rudder in its position.
SUBTASK 27-21-91-020-014-002
(6) Disconnect the electrical connectors [9] from the main rudder PCU [1].
SUBTASK 27-21-91-020-015-002
(7) Disconnect the hydraulic lines from the main rudder PCU [1].
(a) Put a 1 U.S.-gal (3.81 l) oil resistant container, STD-203container below the hydraulic
connections.
(b) Disconnect the return line hydraulic system A [12] from the main rudder PCU [1].
(c) Disconnect the pressure line hydraulic system A [21] from the main rudder PCU [1].
(d) Disconnect the return line hydraulic system B [14] from the main rudder PCU [1].
(e) Disconnect the pressure line hydraulic system B [13] from the main rudder PCU [1].
(f) Install the plugs and caps to the hydraulic lines and ports.
(g) Install a tag on the hydraulic lines to make sure you install them correctly.
SUBTASK 27-21-91-020-016-002
(8) Use a 200 pounds (90.7 kilograms) fishpole to remove the main rudder PCU [1] from the airplane.
------------------------- END OF TASK ---------------------------
737-600/700/800/900
AIRCRAFT MAINTENANCE MANUAL
EFFECTIVITY
GUN 006-099, 101-122; GUN 001-005, 155-157, 201-999
POST SB 737-27-1253
27-21-91
Config 2
Page 403
Oct 10/2007
D633A101-GUN
BOEING PROPRIETARY - Copyright#Unpublished Work - See title page for details
Main Rudder Power Control Unit Installation
Figure 401 (Sheet 1 of 3)/27-21-91-990-804-002
737-600/700/800/900
AIRCRAFT MAINTENANCE MANUAL
EFFECTIVITY
GUN 006-099, 101-122; GUN 001-005, 155-157, 201-999
POST SB 737-27-1253
27-21-91
Config 2
Page 404
Oct 10/2007
D633A101-GUN
BOEING PROPRIETARY - Copyright#Unpublished Work - See title page for details
Main Rudder Power Control Unit Installation
Figure 401 (Sheet 2 of 3)/27-21-91-990-804-002
737-600/700/800/900
AIRCRAFT MAINTENANCE MANUAL
EFFECTIVITY
GUN 006-099, 101-122; GUN 001-005, 155-157, 201-999
POST SB 737-27-1253
27-21-91
Config 2
Page 405
Oct 10/2007
D633A101-GUN
BOEING PROPRIETARY - Copyright#Unpublished Work - See title page for details
Main Rudder Power Control Unit Installation
Figure 401 (Sheet 3 of 3)/27-21-91-990-804-002
737-600/700/800/900
AIRCRAFT MAINTENANCE MANUAL
EFFECTIVITY
GUN 006-099, 101-122; GUN 001-005, 155-157, 201-999
POST SB 737-27-1253
27-21-91
Config 2
Page 406
Oct 10/2007
D633A101-GUN
BOEING PROPRIETARY - Copyright#Unpublished Work - See title page for details
Main Rudder PCU Tool Installation
Figure 402/27-21-91-990-805-002
737-600/700/800/900
AIRCRAFT MAINTENANCE MANUAL
EFFECTIVITY
GUN 006-099, 101-122; GUN 001-005, 155-157, 201-999
POST SB 737-27-1253
27-21-91
Config 2
Page 407
Oct 10/2007
D633A101-GUN
BOEING PROPRIETARY - Copyright#Unpublished Work - See title page for details
TASK 27-21-91-400-803-002
3. Main Rudder Power Control Unit Installation
(Figure 401, Figure 402)
A. References
Reference Title
12-12-00-610-801 Hydraulic Reservoir Servicing (P/B 301)
27-21-00-700-814-002 Rudder Hinge Bearing and PCU Bearing Freeplay (P/B 501)
27-21-00-700-815-002 Rudder Centering Test (P/B 501)
27-21-00-700-816-002 Rudder Pedal Forces Test (P/B 501)
27-21-00-700-817-002 Rudder Travel Test (P/B 501)
27-21-00-700-821-002 Rudder Hinge Friction Test (P/B 501)
27-21-00-800-801 Rudder Hydraulic System A, B, or Standby Pressurization (P/B 201)
27-21-00-840-801 Put the Rudder Hydraulic systems A, B, and Standby Back to the
Condition Before the Pressurization (P/B 201)
27-21-00-840-802 Put the Rudder Systems A, B, and Standby Back to the Condition
Before the Pressure Removal (P/B 201)
B. Tools/Equipment
NOTE: When more than one tool part number is listed under the same "Reference" number, the
tools shown are alternates to each other within the same airplane series. Tool part numbers
that are replaced or non-procurable are preceded by "Opt:", which stands for Optional.
　
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