Free Republic
Browse · Search
News/Activism
Topics · Post Article

To: 6AL-4V
There is nothing on a 777 called a comms mast..

I am sure you are correct on this, I did not look up all the antennae on the trip seven. Apparently there are a lot, and they are not mounted on a mast, like a boat.

However, there is a problem with the antenna mounting. I just googled 'Boeing 777 antennas problems' and guess what I found! So please forgive me for not using the exact terminology. Now tell what would happen if the structural part holding the antenna failed and fell off? Would it make a hole big enough to overcome the engines compression limit? I am sure there are alarms and such, but just suppose this did happen, the crew put on their oxygen masks, and the bottles were empty. In other words, and accident chain happened. Ta-Da! Now the pilots are incapacitated. So what is wrong with my idea? It is simple, Tell me what would keep this from happening?

It is easy to remark the words are wrong. I made this simple for a reason. Let's not get hung up on terminology.

422 posted on 03/11/2014 10:42:15 PM PDT by SandwicheGuy (*The butter acts as a lubricant and speeds up the CPU*ou)
[ Post Reply | Private Reply | To 415 | View Replies ]


To: SandwicheGuy

Antennas don’t fall off. At the location on the fuselage skin where the antenna is mounted there is typically an additional layer of aluminum called a doubler. Its purpose is to strengthen the area around the attach point and around the hole. At some of these attach locations the skin thickness is increased. The size of the hole thru the skin where each antenna attaches is small, maybe 2” diameter, the only thing passing thru it is the coax cable. Again, bleed air from both engines would more than make up for the pressurization loss of a small hole. 777’s have 2 crew oxygen bottles, larger than scuba tanks, pressurized to 1800psi, lots of breathing time. Your theory might seem simple to you, but it is unrealistic actually and highly impracticle. The antenna mounting technology incorporated on the 777 is no different than that used on a 727. Decades of reliability. They just don’t fall off. Come up with a different scenario and we can discuss that too. Regards, 23 yrs A&P mechanic DC-9 thru 747.


423 posted on 03/11/2014 11:11:47 PM PDT by 6AL-4V
[ Post Reply | Private Reply | To 422 | View Replies ]

Free Republic
Browse · Search
News/Activism
Topics · Post Article


FreeRepublic, LLC, PO BOX 9771, FRESNO, CA 93794
FreeRepublic.com is powered by software copyright 2000-2008 John Robinson