4.  Repair Forward Entry Door Torque Tube (Fig. 802)
A.  Disassemble torque tube, hinge pins, and connecting sleeves per instructions in 52-11-11 R/I.
B.  Ream existing 0.2487/0.2497 inch mating holes through connecting sleeve torque tube and hinge pin (4 places at each torque tube) to 0.3112/0.3122 inch, to accommodate NAS1105 bolts. Pretreat holes (Method II and apply Alodine per 51-21-21 and 51-21-41 CP. Apply primer per 51-21-171 CP.
C.  Install torque tube and door per 52-11-11 R/I. Replace the bolts formerly installed through reworked holes with 5/16 inch bolts.
5.  Replace Entry Door Latch Roller Assembly (Fig. 803)
A.  Using roller assembly tool, remove and replace latch roller assembly.
6.  Repair Stop Fitting Cracked Along Parting Line from End Into Stop Fitting Bearing Plate Hole (Fig. 803)
A.  If crack is within 45 degrees each side of parting plane, as shown in Fig. 801, and does not progress beyond stop fitting hole, repair as follows:
(1)  
Remove bearing plate.

(2)  
Cut out crack with a 0.06 inch wide slot into stop pin hole.

(3)  
Enlarge stop fitting hole to provide a 0.002 to 0.012-inch diameter clearance with bearing plate.

(4)  
Pretreat surfaces (Method II) and apply Alodine per 51-20-2 and 51-20-21 CP. Apply primer per 51-20-151 CP.

(5)  
Bond bearing plate back in using BMS 5-79 or 5-95 sealant.

500 
52-11-0 Page 802  BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.  Feb 20/92 

500  Forward Entry Door Upper Roller Guide Plate Latch Pin Hole Repair 
Sep 20/81  Figure 801  52-11-0 
Page 803 
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 

Forward Entry Door Torque Tube Approved Repair  500 
52-11-0  Figure 802  Feb 20/92 
Page 804 
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 

500  Forward Entry Door Stop Fitting Repair 
Jan 20/82  and Latch Roller Replacement  52-11-0 
 Figure 803  Page 805 
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 

FORWARD ENTRY DOOR - TROUBLE SHOOTING
1. General
A.  If entry door is 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 52-11-00,
Adjustment/Test.

2.  Trouble Shoot Forward Entry 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 paralle1 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 of 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.
　
中國航空網 m.k6050.com
航空翻譯 www.aviation.cn
本文鏈接地址：737 AMM 飛機維護手冊 艙門 DOORS(29)