R R  Component Location - Cockpit Door Figure 001 
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R Component Location of the Cockpit Door-Lock System around the Cockpit Door

 Figure 002 
R 1EFF :  001-049, 051-099, 101-105, 151-199,  1 Page 352-51-00
 1201-299, 301-302,  1 Aug 01/05
 1  1
 1CES  1

R Component Location of the Cockpit Door-Lock System around the Cockpit Door

R  Figure 002A 
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R Component Location of the Cockpit Door-Lock System around the Cockpit Door

R  Figure 002B 
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 Component Location of the Cockpit Door-Lock System in the Cockpit
 Figure 003

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R R R R R
R 3. Description
___________
 A. Cockpit Door (Ref. Fig. 001) The cockpit door is installed in the fixed partition between FR13 and FR14 (zone 220). It opens into the flight direction and a magnetic door stop keeps it in its fully open position. The manually operated three latch mechanism keeps the cockpit door in the closed position. Its top, center and bottom latch mechanisms engage with the electrical release strikes installed opposite in the lavatory wall. In case of an emergency the cockpit crew can leave the cockpit through the door escape hatch. They can manually open the hatch against the flight direction.
 **ON A/C 001-049, 051-099, 101-105, 151-199, 201-220, 224-224,
 B. The Cockpit Door-Lock System (CDLS)
(Ref. Fig. 002)

**ON A/C 001-049, 051-099, 101-105, 151-199, 201-220, 224-224,
Post SB 25-1444 For A/C 001-049,051-099,101-105,151-199,201-220,224-224,
(Ref. Fig. 002B)
**ON A/C 001-049, 051-099, 101-105, 151-199, 201-220, 224-224,
(Ref. Fig. 003) The cockpit door has an electro-mechanically operated release system (CDLS) for the cockpit security. The cockpit door is in the locked condition when the CDLS is energized with electrical power. This electrical power comes from the normal busbar 204PP through the circuit breaker 1MQ at the circuit breaker panel 122VU. If the CDLS is not energized with electrical power the cockpit door is in the unlocked condition. The operation of the key pad 25MQ installed in the forward attendant panel 120RH causes the buzzer 23MQ to operate. This tells the cockpit crew that a person requests access to the cockpit. The toggle switch 26MQ on the center pedestal panel 119VU sends a signal to the control unit 24MQ when it is in the UNLOCKED positon. The control unit 24MQ in the overhead panel 20VU then produces an output signal. This signal de-energizes the solenoids of the three electrical release strikes so that the cockpit door is in the unlocked condition . If there is a sufficient loss of cabin pressure in the cockpit, pressure sensors in the control unit 24MQ operate. Then the electrical release
 1EFF : ALL 1 52-51-00Page 7 1 1 Aug 01/05 1 1 1CES 1 1EFF : ALL 1 52-51-00Page 8 1 1 Aug 01/05 1 1 1CES 1 If the CDLS is not energized with electrical power the cockpit door is in the unlocked condition. The operation of the key pad 25MQ installed in the forward attendant panel 120RH causes the buzzer 23MQ to operate. This tells the cockpit crew that a person requests access to the cockpit. The toggle switch 26MQ on the center pedestal panel 119VU sends a signal to the control unit 24MQ when it is in the UNLOCKED positon. The control unit 24MQ in the overhead panel 20VU then produces an output signal. This signal de-energizes the solenoids of the three electrical release strikes so that the cockpit door is in the unlocked condition . If there is a sufficient loss of cabin pressure in the cockpit, pressure sensors in the control unit 24MQ operate. Then the electrical release strikes de-energize and the cockpit door is unlocked in the case of a rapid decompression. If a malfunction occurs in the CDLS the subsequent indication lights come on:

 strikes de-energize and the cockpit door is unlocked in the case of a rapid decompression. If a malfunction occurs in the CDLS the subsequent indication lights come on: - the amber FAULT indication light 22MQ and the LED's CHAN 1 or CHAN 2 of the control unit 24MQ show that the applicable pressure sensor is unserviceable. It is a normal system behavior that these lights may come on when the pressurization test of the fuselage is in progress. When the pressure decreases these lights go off and the CDLS is operative again. - the amber FAULT indication light 22MQ and the LED's TOP, MID or BOT STRIKE of the control unit 24MQ show that the applicable electrical release strike is unserviceable. 
　
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