Frugalqxnwa From United States of America, joined Apr 2004, 565 posts, RR: 1 Posted (9 years 11 months 2 weeks 5 days 12 hours ago) and read 4100 times:
A while ago there was a thread on Boeing's plans for the eyebrow windows still in the fleet. They have been eliminated on the 717, but at the time there was no definate answer for the 737 windows. Well, I was just on Boeing's website and saw a CG picture of a 737NG without the eyebrow windows (I saw this picture on the orders/deliveries report menu screen). Does anyone else have further information?
RedDragon From United Kingdom, joined Jul 2004, 1135 posts, RR: 6
Reply 5, posted (9 years 11 months 2 weeks 5 days 5 hours ago) and read 3692 times:
Boeing only eliminated the eyebrow windows on the 717 a couple of years or so ago, one benefit being a weight saving that I can't recall off the top of my head. Of course this also means you have fewer windows to maintain, fewer to replace if they get damaged and (from what I've heard at least regarding the 737 eyebrows) fewer windows to fog up as they age. By the sounds of it many operators have chosen not to bother replacing permanently-fogged 737 eyebrow windows as pilots never use them. A side benefit of this is that the pilots don't have to hunt around the cockpit for something to use as a sunvisor for the affected panel!
Whitehatter From , joined Dec 1969, posts, RR:
Reply 9, posted (9 years 11 months 2 weeks 4 days 4 hours ago) and read 2803 times:
The eyebrow windows are a relic of the pre-TCAS days, and when terminals didn't have the radar they have nowadays. They are more for spotting conflicting traffic, especially in a turn or bank situation.
Until recently every Rolls Royce was supplied with a starting handle. Same thing, a fitment that was made redundant by change but had never been designed out.
737doctor From United States of America, joined Mar 2001, 1332 posts, RR: 39
Reply 11, posted (9 years 11 months 2 weeks 3 days 22 hours ago) and read 2638 times:
We change those damn windows on virtually every aircraft that comes in for heavy check, but for delamination, not fogging. I don't know how much we would save in weight, but I know we'd save a ton in the cost of replacement windows and labor to replace them.