Document
[IMG]file:///C:/DOCUME%7E1/Ed/LOCALS%7E1/Temp/moz-screenshot.png[/IMG]Hi,
Try to locate this Boeing document D926T0120, perhaps via the Boeing website.
Title is "RNP capability of FANS 1 FMCS equipped 757/767"
On Page 30 you will find a table, specifying the algorithm for IRS only ANP values. Please note that "flight time" is time since system switched to NAV mode.
Sorry, am unable to copy paste the table into this posting.