1EFF : ALL 1 52-36-00Page 18 1 1 Aug 01/05 1 1 1CES 1 C. Manual Opening Procedure
The manual opening procedure of the FWD (AFT) cargo door is an
alternative procedure which is used, when:
-there is a failure in the electrical system,
-the electric pump fails.
NOTE : To simulate an electrical system or an electric pump failure,
____ open, safety and tag the circuit breaker 1MJ on panel 122VU.
To release the cargo door, put the door locking handle in the "unlocked" position. The procedure is the same as for the normal opening procedure.
To operate the door hydraulic system manually, two persons are necessary:
- one must turn and hold the selector on the control panel to the "Open" position during the whole procedure. To get access to the control panel, open the access panel 134AR (154AR) beneath the fuselage.
-the other must operate the hand pump 3009GM on the Yellow ground service panel. To get access to this panel, open the access panel 198CB in the right, aft belly fairing area.
The operation of the selector on the control panel moves the manual selector valve 2501MJ (2504MJ) to the extension mode. To pressurize the door hydraulic system, operate the hand pump 3009GM until the cargo door is fully open.
The hydraulic fluid flows from the reservoir through the manual selector valve 2501MJ (2504MJ) to the door actuators 2502MJ and 2503MJ (2505MJ and 2506MJ). The door actuators extend and open the cargo door to the outer side.
When you stop to operate the hand pump 3009GM or when you release the selector, the cargo door stops. It then remains in position. To continue, set the selector to the "Open" position and operate the lever of the hand pump 3009GM again. Then the door actuators 2502MJ and 2503MJ (2505MJ and 2506MJ) extend again and the cargo door moves in the open direction. The force which is necessary to move the hand pump lever increases suddenly when the door actuators are in their extended, locked positions.
The manual opening procedure is complete when:
-
the selector on the control panel is released,
-
the access panels 134AR (154AR) and 198CB are closed.
1EFF : ALL 1 52-36-00Page 19 1 1 Aug 01/05 1 1 1CES 1 D. Manual Closing Procedure
The manual closing procedure of the cargo door is an alternative
procedure which is used, when:
-there is a failure in the electrical system,
-the electric pump fails.
NOTE : To simulate an electrical system or an electric pump failure,
____ open, safety and tag the circuit breaker 1MJ on panel 122VU.
To operate the door hydraulic system manually two persons are necessary:
- one must turn the selector on the control panel to the "Close" position and hold it during the whole procedure. To get access to the control panels, open the access panel 134AR (154AR) beneath the fuselage.
-the other must operate the hand pump 3009GM on the Yellow ground service panel. To get access to this panel, open the access panel 198CB in the right, aft belly fairing area.
The operation of the selector on the control panel moves the manual selector valve 2501MJ (2504MJ) to the interim mode. To pressurize the door hydraulic system, operate the hand pump 3009GM until the cargo door is closed. The fluid flows from the reservoir through the manual selector valve 2501MJ (2504MJ) to the door actuators 2502MJ and 2503MJ (2505MJ and 2506MJ).
The fluid pressurizes the door actuators on the extension side (port A). When the pressure is sufficent, the selector on the control panel moves to the fully "Close" position. Then the manual selector valve 2501MJ (2504MJ) is in the retraction mode to pressurize the door actuator on the retraction side (port B). The HP fluid releases the mechanically locked door actuators 2502MJ and 2503MJ (2505MJ and 2506MJ). The door actuators retract and the cargo door moves in the close direction.
When you stop to operate the hand pump 3009GM or when you release the selector, the cargo door stops. It then remains in this position. To continue, turn the selector to the "Close" position and operate the lever of the hand pump 3009GM again. When the FWD (AFT) cargo door is flush with the fuselage contour, stop to operate the hand pump 3009GM and release the selector. The manual closing procedure is complete when:
-
the cargo door is in the "Locked" condition. This is the same as for the normal closing procedure,
-
the access panels 134AR (154AR) and 198CB are closed.
1EFF : ALL 1 52-36-00Page 20 1 1 Aug 01/05 1 1 1CES 1
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