CRJ Door / Pressurization Question
07-05-2008 | 08:25 AM
#11
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Joined: Feb 2007
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From: FO
I have gotten the PAX DR OUTR HANDLE caution before (not sure if that is the proper wording)...we didn't ask the FA to touch it in fear of that very confusion. We were in the terminal area anyway.
07-05-2008 | 08:31 AM
#12
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From: ACMI 747-400 FO/USAR C-12
I worked at Comair for 8 plus years and never heard about a story like that. However a Comair flight attendant had a finger severed as she tried to close the door from the outside. It was a windy day and the door slammed shut with her hand clutching the inside of the door. I never met her but she would come into ground school and talk about the incident.
07-05-2008 | 08:33 AM
#13
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From: FO
I worked at Comair for 8 plus years and never heard about a story like that. However a Comair flight attendant had a finger severed as she tried to close the door from the outside. It was a windy day and the door slammed shut with her hand clutching the inside of the door. I never met her but she would come into ground school and talk about the incident.
Holy Crap. Why would you grab the inside/side of the door? I'm not tall enough, so that isn't evne an option for me...I just shove and walk it up with my hands.
07-05-2008 | 08:42 AM
#14
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From: Engines Turn or People Swim
The PSEU sensor for the cabin door cannot be MEL'ed (I tried last week). It's a red message.
07-05-2008 | 08:53 AM
#15
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CHQ had an incident in IAH where a FA was injured by opening the main cabin door while the A/C had a small amount of pressurization remaining. The door came open so fast and with so much force, she was thrown onto the ramp. She was badly injured.
As a -200 PIC for a while, that was my 2nd least favorite thing about the A/C. (inability to disconnect the engine driven HYD pump was #1 - it forced an in-flight shutdown and RTB once).
As a -200 PIC for a while, that was my 2nd least favorite thing about the A/C. (inability to disconnect the engine driven HYD pump was #1 - it forced an in-flight shutdown and RTB once).
07-05-2008 | 09:20 AM
#16
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From: FO
Looking at a couple of websites, the Co-efficient of friction for steel on steel lubricated is around .15 (http://www.carbidedepot.com/formulas...icient.htm)for about 20k pounds that would take about 3000pounds of force to break it free. given about a 3 foot door handle (a lever) it would take possible 1000 pounds exerted by the FA to pull the handle.
I'm sure as hell not going to go and try it, but I still think it isn't very easily done.
07-05-2008 | 09:30 AM
#17
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From: Right Seat... Forever
CHQ had an incident in IAH where a FA was injured by opening the main cabin door while the A/C had a small amount of pressurization remaining. The door came open so fast and with so much force, she was thrown onto the ramp. She was badly injured.
As a -200 PIC for a while, that was my 2nd least favorite thing about the A/C. (inability to disconnect the engine driven HYD pump was #1 - it forced an in-flight shutdown and RTB once).
As a -200 PIC for a while, that was my 2nd least favorite thing about the A/C. (inability to disconnect the engine driven HYD pump was #1 - it forced an in-flight shutdown and RTB once).
07-05-2008 | 09:41 AM
#18
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From: Engines Turn or People Swim
The coeffeicent of friction doesn't have to be very high when your talking about 20,000 pounds.
Looking at a couple of websites, the Co-efficient of friction for steel on steel lubricated is around .15 (http://www.carbidedepot.com/formulas...icient.htm)for about 20k pounds that would take about 3000pounds of force to break it free. given about a 3 foot door handle (a lever) it would take possible 1000 pounds exerted by the FA to pull the handle.
I'm sure as hell not going to go and try it, but I still think it isn't very easily done.
Looking at a couple of websites, the Co-efficient of friction for steel on steel lubricated is around .15 (http://www.carbidedepot.com/formulas...icient.htm)for about 20k pounds that would take about 3000pounds of force to break it free. given about a 3 foot door handle (a lever) it would take possible 1000 pounds exerted by the FA to pull the handle.
I'm sure as hell not going to go and try it, but I still think it isn't very easily done.
The linear calculation applies to two flat surfaces with all force applied perpendicular. Since the pins and their holes are cyclindical, the math would be different (I'm not doing calculus on saturday
). But I wouldn't want to try it either.
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