(9)
Disconnect the cable from the fitting on the door. S 865-033
(10)
Lift the door to the fully open position (Fig. 502).
S 985-038 WARNING: BE CAREFUL WHEN YOU ARE NEAR THE DOOR AND THE BALANCE MECHANISM
_______ IS DISCONNECTED. IF YOU HIT THE DOOR, THE UPLATCH HOOK CAN RELEASE. IF THE UPLATCH HOOK RELEASES, THE DOOR WILL CLOSE QUICKLY. THIS CAN CAUSE INJURY TO PERSONNEL.
(11)
Engage the uplatch hook to hold the door open. S 495-035
(12)
Attach a red streamer to the uplatch hook. S 865-025
(13)
Put a 4-inch thick foam pad across the bottom of the door opening (Fig. 502).
NOTE: Use the pad to protect the door and the door opening.
____
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A
747-400
MAINTENANCE MANUAL
Bulk Cargo Door Uplatch Hook
Figure 502
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747-400 MAINTENANCE MANUAL
S 865-041
(14)
Do these steps to do a test of the snubber:
(c)
The snubber is satisfactory if the time you measure is more than 2.0 seconds.
(d)
If the door does not move smoothly, or the time you measure is less than 2.0 seconds, replace the snubber (Ref 52-36-05/401).
WARNING:_______ STAND AWAY FROM THE DOOR AND THE DOOR OPENING WHEN YOU RELEASE
THE UPLATCH HOOK. WHEN YOU RELEASE THE UPLATCH HOOK, THE DOOR
WILL FALL QUICKLY IF THE SNUBBER IS DEFECTIVE. THIS CAN CAUSE
INJURY TO PERSONNEL.
(a) Release the uplatch hook.
(b) Measure the time until the door hits the pad.
NOTE: It is satisfactory for the door to fall freely up
____ to six inches before the snubber holds it.
S 965-015
(15)
Replace the snubber if it has any leaks (Ref 52-36-05/401).
S 865-016
(16)
Lift the door to the fully open position.
S 985-017
WARNING: BE CAREFUL WHEN YOU ARE NEAR THE DOOR AND THE BALANCE MECHANISM
_______ IS DISCONNECTED. IF YOU HIT THE DOOR, THE UPLATCH HOOK CAN RELEASE. IF THE UPLATCH HOOK RELEASES, THE DOOR WILL CLOSE QUICKLY. THIS CAN CAUSE INJURY TO PERSONNEL.
(17)
Engage the uplatch hook with the support clip (Fig. 502).
S 095-017
(18)
Remove the pad from the door opening.
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747-400 MAINTENANCE MANUAL
S 985-018
(19)
Release the uplatch hook to close the door. S 095-019
(20)
Remove the red streamer from the uplatch hook. S 985-020
(21)
Lift the door a small distance. S 425-020
(22)
Connect the door cable to the fitting on the door. S 865-031
(23)
Close and latch door.
WARNING:_______ DO NOT CLOSE THE DOOR UNLESS THE CABLES FULLY ENGAGE THE CABLE
DRUM AND THE PULLEYS. IF THE CABLES ARE DISENGAGED, YOU CAN
CAUSE INJURY TO PERSONNEL OR DAMAGE TO EQUIPMENT.
S 095-032 WARNING: MAKE SURE ALL CABLES ARE ATTACHED BEFORE YOU REMOVE THE
_______ SAFETY PIN OR THE CABLE RESTRAINING TOOL. IF YOU REMOVE THE SAFETY PIN OR THE CABLE RESTRAINING TOOL THE CABLE CAN MOVE QUICKLY. IF THE CABLE MOVES QUICKLY IT CAN CAUSE INJURY TO PERSONNEL.
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