Subtask 52-11-21-010-062
B. Get Access
WARNING : BEFORE YOU START WORK ON THE DOOR, MAKE SURE THAT:
_______
-
THE EMERGENCY CONTROL HANDLE IS IN THE DISARMED POSITION WITH THE SAFETY PIN INSTALLED.
-
THE PERCUSSION LEVER OF THE DOOR-DAMPER AND EMERGENCY-OPERATION CYLINDER IS IN THE DISARMED POSITION WITH THE SAFETY PIN INSTALLED.
WARNING : DO NOT OPEN THE PASSENGER/CREW DOOR IF THE WIND SPEED IS MORE
_______
THAN 65 KNOTS.
WARNING : STOP THE OPENING PROCEDURE IF THE RED WARNING LIGHT FLASHES.
_______ RESIDUAL PRESSURE COULD CAUSE THE DOOR TO OPEN WITH A SUDDEN FORCE AND INJURE PERSONS AND/OR DAMAGE THE AIRCRAFT.
(1)
Put the access platform in position at the applicable FWD passenger/crew door 831 or 841.
(2)
Open the applicable FWD passenger/crew door 831 or 841 (Ref. TASK 52-10-00-010-001).
(3)
Obey the special precautions before you start work on the door (Ref. TASK 52-10-00-860-001)
Subtask 52-11-21-865-060
C. Open, safety and tag this(these) circuit breaker(s):
-------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------121VU EIS/SLIDES/ARM AND WARN/FLT 15WN P11 121VU EIS/SLIDES/ARM AND WARN/GND 13WN P10 121VU EIS/SDAC1 AND 2/DOOR/DET/PAX 48WV P05
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D. Removal of the Door Locking Mechanism
(Ref. TASK 52-11-21-000-001)
(1)
Remove the lowering shaft, if not removed.
(2)
Remove the inner control handle, the outer control handle and the gearbox, if not removed.
(3)
Remove the reducer shaft mechanism, if not removed.
(4)
Remove the upper and lower connection links, if not removed.
(5)
Remove the compensation mechanism, if not removed.
(6)
Remove the locking shaft mechanism, if not removed.
(7)
Remove the safety pin and the locking hook, if not removed.
4. Procedure
_________ Subtask 52-11-21-220-052
A. Inspection of the Lowering Shaft
(Ref. Fig. 601/TASK 52-11-21-991-024)
(1) Do a detailed visual inspection of the bushes, the bearing and the parts of the lowering shaft.
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Lowering Shaft
Figure 601/TASK 52-11-21-991-024- 12 (SHEET 1)
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Lowering Shaft
Figure 601/TASK 52-11-21-991-024- 22 (SHEET 2)
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(2) Make sure that the dimensions are correct.
-------------------------------------------------------------------------------| FIG. | ORIGINAL MANUFACTURING LIMITS | IN-SERVICE WEAR LIMITS | | DETAIL |---------------------------------------|----------------------------| | AND | DIMENSION | ASSEMBLY CLEARANCE| DIMENSION LIMITS | MAX. | | ITEM | MM (IN.) | MM (IN.) | MM (IN.) | ALLOW. | | NO. |-------------------|-------------------|---------|---------| CLEAR. | | | MIN. | MAX. | MIN. | MAX. | MIN. | MAX. |MM (IN.)| |--------|---------|---------|---------|---------|---------|---------|--------| | DD | | | | | | | | | OD1 | 10.966 | 10.980 | | | 10.949 | | | | | (0.4317)| (0.4324)| | | (0.4314)| | | | | | | 0.016 | 0.052 | | | 0.103 | | | | | (0.0006)| (0.0020)| | |(0.0040)| | ID2 | 11.000 | 11.108 | | | | 11.052 | | | | (0.4330)| (0.4370)| | | |(0.4354) | | |--------|---------|---------|---------|---------|---------|---------|--------| | EE | | | | | | | | | OD4 | 6.344 | 6.353 | | | 6.332 | | | | | (0.2497)| (0.2501)| | | (0.2492)| | | | | | | 0.005 | 0.036 | | | 0.072 | | | | | (0.0001)| (0.0014)| | |(0.0028)| | ID5 | 6.358 | 6.380 | | | | 6.404 | | | | (0.2503)| (0.2511)| | | |(0.2523) | | -------------------------------------------------------------------------------
(3)
If the wear of the bushes is not in the tolerances:
(a)
Replace the bushes (Ref. TASK 52-10-00-915-001).
(b)
Or replace the parts on which they are installed.
(4)
If the bearing (3) is worn or unserviceable:
(a) Replace the flange bearing assy.
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