at 0212, a 3422 event in the standby flight instruments (ISIS) (34 is navigation, 3422 is directional gyro and indicators)
Then the laser ring gyro in the ISIS complains,
Ladkin
IF there was no attitude reference,it was mission impossible.Why no mechanical gyro?You must leave the pilot something(SAI/compass)when the primary technology fails.Mechanical gyro has moving parts and can topple but is ROBUST.KISS.
4PWS,
I'm afraid you wont be very popular here.You have my sympathies.