The locking shaft mechanism of the 73" door contains the subsequent
components:
(Ref. Fig. 011)
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the locking shaft assembly,
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the intermediate shaft assembly
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the locking indication,
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the locking hook assembly,
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the drift pin assembly. The locking shaft assembly includes the engaging lever, the fork lever, the actuation lever, the indication lever, and the locking shaft. A push rod is installed between the internal control shaft and the engaging lever. It transmits the movement of the inboard or outboard handles through the fork lever to the locking shaft. The indication lever operates the locking indicator which shows the actual condition of the locking mechanism. The actuation lever is connected to the intermediate lever through the push rod. Thus, a rotation of the locking shaft turns the intermediate shaft.
On the intermediate shaft there are an actuation lever, a twin lever and a target lever. On the actuation lever there is an actuation rod to lower and lift the guide arm cover.
A connection rod is installed between the intermediate shaft and the locking hook. The locking hook which engages with the upper lock fitting of the door frame keeps the door in the closed position. The twin lever transmits the rotation of the intermediate shaft to the drift pin assembly. Also, a spring unit is installed between the twin lever and the door structure. It makes sure that the locking shaft mechanism is always in the overcenter position.
1EFF : 301-399, 1 52-22-00Page 17 1 1 May 01/04 1 1 1CES 1
Door Handle and Locking Shaft Mechanism of 73" Emergency Exit Door Figure 011 (SHEET 1)
1EFF : 301-399, 1 52-22-00Page 18 1 1 May 01/04 1 1 1CES 1
Door Handle and Locking Shaft Mechanism of 73" Emergency Exit Door Figure 011 (SHEET 2)
1EFF : 301-399, 1 52-22-00Page 19 1 1 May 01/04 1 1 1CES 1 The drift pin assembly includes the fork link, the guide fitting and the drift pin. The fork link connects the twin lever of the locking shaft to the drift pin. The extended drift pin prevents an accidental movement of the locking shaft mechanism during the flight. The locking shaft mechanism of the 60" door contains the subsequent components: (Ref. Fig. 012)
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the locking shaft assembly,
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the locking indication,
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the locking hook,
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the drift pin assembly.
The locking shaft assembly includes the engaging lever, the fork lever, the actuation lever, the indication lever, the double lever and the locking shaft.
A push rod is installed between the internal control shaft and the engaging lever. It transmits the movement of the inboard or outboard handles through the fork lever to the locking shaft. Then, the actuation lever operates the locking hook through the push rod. The locking hook which engages with the upper lock fitting of the door frame keeps the door in the closed position. The indication lever operates the locking indicator which shows the actual condition of the locking mechanism. The double lever transmits the rotation of the locking shaft to the drift pin assembly. Also, a spring unit is installed between the twin lever and the door structure. It makes sure that the locking shaft mechanism is always in the overcenter position.
The drift pin assembly includes the fork link, the guide fitting and the drift pin. The fork link connects the double lever of the locking shaft to the drift pin. The extended drift pin prevents an accidental movement of the locking shaft mechanism during the flight.
(3) Balance Mechanism (Ref. Fig. 013) The balance mechanism includes the torsion bar assembly, the pretension unit and the connection rod. All components are installed in the lower section of the door.
The torsion bar assembly contains the pretension lever, the torsion spring, the torsion lever and the torsion bar. The link connects the torsion lever and the transmission lever of the lifting shaft. The rotation of the lifting shaft causes a tension of the torsion bar and the related torsion spring.
1EFF : 301-399, 1 52-22-00Page 20 1 1 May 01/04 1 1 1CES 1 The primary components of the pretension unit are the pretension rod and the adjustment unit. The pretension rod connects the pretension lever with the adjustment unit. The pretension condition of the torsion bar is set when the adjustment screw of the adjustment unit is turned.
(4) Lifting Mechanism (Ref. Fig. 013) The lifting mechanism is installed in the lower section of the door. It includes the lifting shaft assembly, the door detent shaft and the adjustment lever unit.
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