Hello Tech Guys,
During a Dual Engine Failure on the 777 part of the emergency checklist procedure is to push the Ram Air Turbine Switch - AND PUSH AND HOLD FOR 1 SECOND. Can anyone tell me why we have to Hold it for 1 second, but more specifically what is it actually doing mechanically/electrically?
The old Quick Reference Handbook (QRH) for the 777 says this action "backs up automatic deployment of the RAT." That's a general reason why we do it, but can anyone shed any light on what physically is happening and why we must push it for at least 1 second? I'd like to know and hopefully I'll never have to do it. Thanks!
Aloha!
