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Weird 737 Jetway Ops  
User currently offlinejgw787 From United States of America, joined Dec 2010, 206 posts, RR: 0
Posted (3 years 2 months 1 week 5 days 13 hours ago) and read 3934 times:

I've been looking at pics of 737s at jetways and a lot of times the retractable hood that covers pax as they first come out is not attached to the plane. why is this???

5 replies: All unread, jump to last
 
User currently offlinefreakyrat From United States of America, joined Aug 2008, 761 posts, RR: 1
Reply 1, posted (3 years 2 months 1 week 5 days 13 hours ago) and read 3803 times:
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They have had a few cases of worn out bolts in the cover puncturing the aircraft skin. Also the cover is strong and on some planes have knocked off antennas.

User currently offlineMaverick623 From United States of America, joined Nov 2006, 5429 posts, RR: 6
Reply 2, posted (3 years 2 months 1 week 5 days 10 hours ago) and read 3583 times:

Quoting freakyrat (Reply 1):
They have had a few cases of worn out bolts in the cover puncturing the aircraft skin.

Not entirely true, although this is possible, it would be noticed on all airplanes using that particular jetway.


The reason is because there are Pitot tubes and an angle-of-attack sensor very close to the L1 door, and some canopies are wide enough that they may hit and damage them.



"PHX is Phoenix, PDX is the other city" -777Way
User currently offlinefreakyrat From United States of America, joined Aug 2008, 761 posts, RR: 1
Reply 3, posted (3 years 2 months 1 week 5 days 5 hours ago) and read 3346 times:
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Maverick thanks for the comment about the sensors. I forgot about them. The wider canopies on some jetways just get in the way of sensors antennas etc. Some jetway canopies are also not rolled over on CRJ's because of the roof antenna in proximity. The simple ground level RJ gates at Montreal Dorval on the end of the transborder wing for example had to be reworked so they wouldn't knock off the antennas.

User currently offlinetymnbalewne From Bermuda, joined Mar 2005, 937 posts, RR: 1
Reply 4, posted (3 years 2 months 1 week 5 days 3 hours ago) and read 3177 times:

Interestingly enough, the reason for the hood isn't only for keeping the weather out but there's a safety aspect with respect to fire. IIRC the hood is designed to provide 5 minutes-ish of fire protection before burning through.


Dewmanair...begins with Dew
User currently offlineHAWK21M From India, joined Jan 2001, 31573 posts, RR: 57
Reply 5, posted (3 years 2 months 1 week 1 day 7 hours ago) and read 2371 times:

To Avoid damage to the Aircraft Antennas/Probes in close proximity.
Same concept applies to a few specific shaped Stepladders too.
regds
MEL.



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