Stoicescu From United States of America, joined Sep 2005, 79 posts, RR: 0 Posted (9 years 9 months 3 weeks 5 days 15 hours ago) and read 1745 times:
Let's assume the following scenario:
You move the IRS switches to Nav and during the 10 minutes (more or less depending of aircraft) the aircraft gets moved because of some reason...You get IRS failed! How far back do you have to go with the IRU setup to restart it? (do you just move it to off and than to Nav again or you have to enter your position again also)
What is your company SOP saying about the economy setting in the FMS. It is said 80 is the standard option to use however I guess because of the current fuel prices some companies will go for lower numbers.
Avioniker From United States of America, joined Dec 2001, 1109 posts, RR: 11
Reply 4, posted (9 years 9 months 3 weeks 5 days 5 hours ago) and read 1697 times:
That's one of the nice features of the ADIRU's installed in the 737NG fleet. The software has been programmed to simply stop the alignment until the aircraft is still again and it picks up where it left off. It's also very tolerant of position errors so moving the aircraft across the field probably won't cause a position crash.
That's a bit simplified but that's how it works.
One may educate the ignorance from the unknowing but stupid is forever. Boswell; ca: 1533