Originally Posted by
BearX220
The jack screw failure on AS261 was (A) a result of faulty maintenance procedures and (B) a one-time event. You might as well avoid all 737s because of their never-explained uncontrolled rudder incidents, associated with multiple fatal crashes (UA585, US427, etc.).
And intriguingly buggy logic in some 737NG systems like the logic that has the autothrottles retard thrust when one of the radio altimeters indicates at or below 0 AGL.
That was one of the contributing factors in the THY crash short of the runway at AMS/EHAM. Failed RA causes negative AGL indication, thrust levers brought back to idle by the autothrottles, clueless pilots fly on for
over a minute not realizing they were at idle and getting progressively lower than the glideslope, airplane lands in field way short of runway.
An AA 738 shooting an approach into MIA had an almost identical scenario within +/- a couple weeks of the THY accident at AMS. The good news is that the pilots flying that airplane immediately recognized the uncommanded rollback, disconnected the autopilot, advanced the throttles and hand flew a go around and subsequent completely normal, uneventful landing.