Galley Service Door Operation from Outside Airplane 500
52-41-0 Figure 3 Nov 15/66
Page 10
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
C. The door is closed from the airplane interior by depressing door open stowing latch lever which releases the latch pin. The door is swung through the opening by means of the assist handle, and when the stop pin contacts the stop plate, the door is in the cocked position. As the door is swung around from the latched open position, the inside handle automatically moves clockwise to the fully open position, as described in paragraph 8.A. Rotating the inside handle 180° counterclockwise operates the door mechanism in the reverse direction to that described in paragraph 8.A., and brings the door into the center of the door opening. The door centering guide engages with the centering track and guides the door into the center of the door opening, allowing the latch rollers to engage with the latches. Rotation of the latch rods operates the upper and lower gate control rods and unfolds the gates outward. The action of the latch rollers in the latches pulls the door into the door opening, compresses the seal around the edge of the door and opens the door warning switch. Refer to Section 52-71-0.
D. The door is closed from the airplane exterior by depressing the door open stowing latch lever or stowing latch button and swinging the door through the opening by means of the assist handle. The outside handle is grasped with both hands, pulled outward to engage the splines on the handle sleeve with the splines on the handle shaft and to clear the handle recess panel, and rotated 180° counterclockwise. The handle is then returned into the recess.
501
May 01/98 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 52-41-0 Page 11
GALLEY SERVICE DOOR - TROUBLE SHOOTING
1. General
A. If galley service door his hard to operate looseness is felt when operating door or door handle closing torque is high, trouble shoot door by operating door as described below to isolate trouble area.
B. Check clearance and gaps specified below and make any adjustments per 52-41-0,
Adjustment/Test.
2. Trouble Shoot Galley Service Door
A. Operate door toward closed position and check for hard spots while door is going through the cycle up to but not closing (Ref step D for last inch of closing). If a check does not reveal anything, disconnect linkages until the hard spot can be found. Lubricate all moving bearings except teflon bearings.
B. Check for grinding noises. These can be pinpointed in a noisy area by using a plastic tube approximately 1/4 X 10 X 24 inches long held to the cam at one end and search for the location while someone moves the door mechanism.
C. Check for loose bolts or elongated holes in torque tube by observation or by placing the finger on the part in question while someone operates the mechanism. There should be no movement felt between the torque tubes and cranks, splices, or end fittings.
D. When closing the door during the last inch of travel, follow these steps closely:
(1)
Door must travel parallel to opening.
(2)
Door latch rollers must be in latch cams before the latch roller crank turns.
(3)
Vertical clearance of the gates at top and bottom.
(4)
Door flushness of door skin and body skin.
(5)
Gate flushness at upper and lower edge of cutout.
(6)
Stop pins must clear stop pads by 1/2 turn.
(7)
Check for bottoming of latches, stop pins, or cranks in clearance holes. Use modeling clay in the inspected area.
NOTE: A light coating of vaseline on the clay surface will prevent clay pickup on moving parts.
(8)
Check for latches being out of time with handle cam. When closing the door, the door body should drop back in 0.015 inch as the latches go 10 degrees overcenter. The gates should just stop and not go back in. Check the alignment o f the push rod and crank that operates the gate when the door is closed. These should have dead center alignment with the latching torque tube with door closed.
中国航空网 www.aero.cn
航空翻译 www.aviation.cn
本文链接地址：737 AMM 飞机维护手册 舱门 DOORS(103)
