From the Diaries of V.V. Yershov - about the Tu-154, 1993

In flight, we do not fully trust any of our systems, units or instruments. Neither the six-stringed NGO (“Cybernetic Companies’ Pallot-Greek”), nor the unfortunate radio compass, nor the praised ABSU, nor the insidious automate of traction. And the whole flight is based on the principle: watch, look at it, stick to the side. It flies on almost every flight. Only you guess: what gyrosystem in the course system goes, and where; what air horizon is overwhelmed (a little bit, and there is); what speed indicator vibrates; on what parameter - azimut or distance - do not trust "Michael"; what locator hit: just barrachlo, what is mainly our "Groza", or in general, honest shit, the X-ray apparatus; exaggerate or lower spending meters, whether the fuel meters are rolled, and in what group of tanks more fuel; why the plane is curved, leaves the course and holds the tangle in the drive of the autopilot; whether a tablet with a tape-card lies heavily; whether a communicative radio station with a range of 16,000 kilometers or simply a failure to pass the waves.
...
be ready! Always ready!
I still love my bite. You won’t explain it.