fly777ual From United States of America, joined May 1999, 4512 posts, RR: 3
Reply 2, posted (15 years 4 months 6 days ago) and read 995 times:
I thought it was US Air 737-400 at PIT. The 737-200 was UA's, and an Eastwind had an uncomm. roll at Richmond. The Metrojet -200 had an uncomm. roll, but the pilots corrected it. Later on that day (or week) a UA 737(300?) had stiff rudder pedals at SEA>
Lindy From , joined Dec 1969, posts, RR:
Reply 5, posted (15 years 4 months 5 days 22 hours ago) and read 996 times:
Now I'm confused!
One is saying it was -200, other -300, and another -400. Also I dont know any crash that had place at PIT on October. Maybe you guys talking about September 8, 1994, USAir Flight 427???? If so, it was 737-300
Satchmo From Germany, joined Sep 2005, 1 posts, RR: 0
Reply 6, posted (15 years 4 months 5 days 18 hours ago) and read 995 times:
There are two losses of aircraft(United 585 near Colorado Springs (737-200) and USAir 427 near Pittsburgh (737-300)) which have not been fully explained. However most experts believe that both
crashes, which claimed the life of 157 people, as well as the Eastwind and MetroJet incidents were caused by uncommanded rudder troubles due to failures in the PCU and/or yaw dumper system. Apart from that there have been hundreds of incidents where pilots reported uncommanded swings of the rudder in the 737's long carrer. All the early models had no system to limit a possible uncommanded rudder movement. Unfortunately Boeing and the FAA have been very slow and reluctant to act. This is understandable, but not acceptable and could lead to more incidents. Just imagine the millions of pounds it would cost Boeing to acknowledge that the rudder is defective and the associated changes to almost 3000 in-service aircraft. However, Boeing at least introduced some changes to new-build versions of the 737,which of course do not affect all the previous models. Don't get me wrong: I don't think the 737 is an unsafe aircraft (I just flew on one three weeks ago), but in the interest of flight safety it would be better to fully investigate the causes of this rudder phenomenon.