(2)
Disconnect the autopilot position transmitter rod to protect it from damage when checking rods in the following steps.
(3)
Disconnect the autopilot servo rods from the centering mechanism and check rods for binding.
WARNING: DO NOT REMOVE THE POWER CONTROL UNIT VALVE CONTROL ROD WITH
_______ HYDRAULIC POWER ON. INJURY TO PERSONS OR DAMAGE TO EQUIPMENT CAN OCCUR.
(4)
Disconnect the PCU valve control rods and check rods for binding with hydraulic power off.
(5)
Measure control wheel torque for changes.
(6)
Loosen left body cables AA and AB (less than 20 pounds). Measure control wheel torque for changes. Cable system friction is dependent on the rig load. Relaxing cable load will help identify pulley or bearing problems.
(7)
Disconnect left body cables to isolate Captain's column and drum. Check for binding in the control column and/or drum.
(8)
Lift Captain's control column to disengage paddle, keeping the column wiring intact. Check control column for binding. Also check that the paddle bolt torque is between 5-10 pound-inches above run-on torque. The aileron control drum should rotate freely.
(9)
Remove floor panels and/or cargo ceiling liners to inspect left cable run. Spin all pulleys, they should spin freely.
(10)
Reconnect cable and inspect cable run. Check for hangups, deflecting fairleads or grommets and bent pulley brackets.
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27-11-00
ALL ú ú 02 Page 102 ú Jul 12/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
B. The following steps isolate friction in the right side.
(1)
Loosen and disconnect the bus cables ACBA and ACBB, if still connected, to isolate the right cable side.
(2)
Disconnect right body cables AA and AB from the right aft quadrant (AMM 27-11-91/401). Manually rotate the quadrant and check for binding.
(3)
Lift First Officer's control column to disengage paddle, keeping the column wiring intact. Check control column for binding. Also check that the paddle bolt torque is between 5-10 pound-inches above run-on torque. The aileron transfer mechanism drum should rotate freely.
(4)
If the aileron transfer mechanism drum does not rotate freely, do the steps that follow:
(a)
Replace the lower bearing support without pocket installed in the aileron transfer mechanism to prevent jamming of the first officer's control wheel.
NOTE: Foreign object's collected in the pocket of the lower
____ bearing support can cause jamming.
(b) Replace the lower spoiler drum and two aileron transfer mechanism bearings with bearings that are not roller swaged in the spoiler drum of the aileron transfer mechanism.
NOTE: Damaged spoiler drum bearings and spoiler lower cable
____ drum can cause binding at the spoiler lower cable drum and cause interference to the free turning of control wheel.
(5)
Remove floor panels and/or cargo ceiling liners to inspect right cable run. Spin all pulleys, they should spin freely.
(6)
Reconnect cable and inspect cable run. Check for hangups,
deflecting fairleads or grommets and bent pulley brackets.
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
27-11-00
ALL ú ú 01 Page 103 ú Nov 12/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 737-300/400/500MAINTENANCE MANUAL
OK - Do a check of the aileron bus cables ABSA and ABSB for objects that can cause a blockage. Remove the unwanted objects as it is necessary.
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú 中国航空网 www.aero.cn 航空翻译 www.aviation.cn 本文链接地址：737-300 400 500 AMM 飞机维护手册 飞行操纵 FLIGHT CONTROLS 1(75)
