Cockpit Door Auto unlock by CDLS
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Cockpit Door Auto unlock by CDLS
Why cockpit door is Automatically unlocked during a cockpit decompression what is the logic behind this ?
Does cockpit door unlocks during a cabin decompression too ?
Does cockpit door unlocks during a cabin decompression too ?
The OP here in addition to posing a lot of questions here is also flooding anet with the same questions under a different name (LandingGear).
Training in India (if this is legitimate) must be really poor as we have seen this web flooded with questions from Indians lately.
Training in India (if this is legitimate) must be really poor as we have seen this web flooded with questions from Indians lately.
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If the door unlocked during a cabin decompression that would potentially cause the flight deck to suffer a decompression too if, the door was forced open because of the pressure differential. The door unlocks during a flight deck decompression because it is unpossible to open the door anyway because of the same pressure differential effect.
We have inward opening toilet doors to make a cabin decompression survivable should you be relieving yourself at the time.
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Here was I thinking the aim was to equalize the pressure between all compartments in case of a decompression? Hence the blow out panels, installed in the flight deck door as well as in the cabin floor to the cargo holds. On 737, that is.
Also, on the 737 I don't think the door automatically unlocks? I am not going to dig out the FCOM now to double check, but if it did I guess it would simplify the process of accessing the flight deck in case possible incapacitation.
Also, on the 737 I don't think the door automatically unlocks? I am not going to dig out the FCOM now to double check, but if it did I guess it would simplify the process of accessing the flight deck in case possible incapacitation.
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No, no, no. The aim is to ensure the flight deck doesn't decompress. An auto unlock in the case of a flight deck decompression ensures that the hosties have instant access to bring us coffee, mop our brows and whisper to us that we're awesome...once the pressure differential is reduced to normal of course. 
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Many years ago but I had supervised and installed several IRCD doors. I very well may be wrong but the DP system only releases the ballistic panels to allow for airflow as to not hurt the crew or create further damage to the door. The door remains locked but provides a lesser degree of security. At interval and initial installation the door is tested by applying vacuum pressure to a sensor/ pneumatic/mechanical device on the door. Logically I believe it is on the inside, have not really payed much attention to them since mandated installation.
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A330/340 example
Why cockpit door is Automatically unlocked during a cockpit decompression what is the logic behind this ?
Does cockpit door unlocks during a cabin decompression too ?
The higher cockpit pressure would resist the door inward opening if it was possible..
