HAL From United States of America, joined Jan 2002, 2560 posts, RR: 53
Reply 2, posted (11 years 2 weeks 4 days 21 hours ago) and read 3371 times:
To add to what Mech24 said, the red outline is the door to the RAT. It deploys if both engines quit in flight to provide hydraulic power through the center hydraulic system to the flight controls. It also can be deployed manually by a button on the upper panel in the flight deck. The red outline is to keep people underneath the plane away from below the door. The danger comes from that button in the cockpit. The RAT is spring loaded to open RIGHT NOW when the button is pushed (or if needed when both engines go out). It is a very powerful spring, and as part of our training we are told to ALWAYS stay away from underneath that door. If it opens and hits you, you're probably dead. That's why we sometimes refer to that button as the 'Ramper Snuffer'. It's in poor taste, but accurate.
One smooth landing is skill. Two in a row is luck. Three in a row and someone is lying.
747Teach From United States of America, joined Nov 2000, 176 posts, RR: 1
Reply 4, posted (11 years 2 weeks 4 days 10 hours ago) and read 3250 times:
Cancidas: As the others pointed out, the square outline on the bottom of the fairings is the RAT door. On the 757, the arm that supports the RAT is extended by a spring actuator, and retracted by hydraulic pressure. It can extend very quickly (757 AMM 29-21-00). The RAT on the 767 is extended and retracted by the extend/retract electric motor on the top of the pivot arm, and actually drives out relatively slowly (767 AMM 29-00-05). Regards,
AussiePete From Australia, joined May 2003, 72 posts, RR: 0
Reply 10, posted (11 years 2 weeks 2 days ago) and read 3073 times:
I flew an approach into YSSY on the 767 sim with only the RAT deployed and both engines shutdown. Lets' just say that it's a dire time indeed when it happens for real. Not very responsive flying but it does the job.
I imagine that the Air Canada flight that ran out of fuel and landed on a racetrack a few years ago had the RAT deployed.