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Pratt Powered 757/767's & Lauda Air Crash  
User currently offlineI-DAVI From , joined Dec 1969, posts, RR:
Posted (15 years 6 days 8 hours ago) and read 2107 times:

As I'm sure you all recall, Lauda Air flight 224 crashed in October 1990 after an uncommanded deployment of thrust reversers in flight and the inability of the crew to take quick action (the manual left them no other choice).

What steps if any were taken to Pratt powered 757's and 767's (like UA, etc.) as a result?

6 replies: All unread, jump to last
User currently offlineCV990A From United States of America, joined Sep 1999, 1433 posts, RR: 0
Reply 1, posted (15 years 6 days 8 hours ago) and read 2062 times:

As a result of the Lauda crash, the locks on the Pratt thrust reversers were re-designed as to prevent a similar accident from happening again.

Kittens Give Morbo Gas
User currently offlineI-DAVI From , joined Dec 1969, posts, RR:
Reply 2, posted (15 years 6 days 8 hours ago) and read 2059 times:

Have all the changes been made or are there still affected a/c out there?

User currently offlineSpacepope From Vatican City, joined Dec 1999, 3012 posts, RR: 1
Reply 3, posted (15 years 6 days 8 hours ago) and read 2052 times:

I believe that all changes have been made.

The last of the famous international playboys
User currently offlineAcvitale From United States of America, joined Aug 2001, 922 posts, RR: 10
Reply 4, posted (15 years 6 days 7 hours ago) and read 2050 times:

All aircraft have been modified... As of 10/1992

User currently offlinePratt-Whitney From , joined Dec 1969, posts, RR:
Reply 5, posted (15 years 5 days 23 hours ago) and read 2036 times:

The problem was originally fixed for all PW4000 powered 767s. A locking device called a Sink-Lock was installed. This pin is supposed to prevent deployment of the reverser, however more recently tests have shown that the pin may not be completely sufficent to stop a reverser. PW, GE, RR and Boeing have all been looking into ways to prevent inflight deployment, with the FAA it is likely that more changes may be made in the future.

All analysis also suggests that this problem could occur with GE engines and RR as well, however steps were taken to learn from the PW problem. But, remember Boing contracted the design of the reverser not PW.

Anyway the problems should have all been fixed as a previous poster stated. The problem does not apply to the 757 as it uses the PW2000 engine and a different reverser set up.

User currently offlineI-DAVI From , joined Dec 1969, posts, RR:
Reply 6, posted (15 years 5 days 13 hours ago) and read 2023 times:

Roger and thanks. Didn't mean to harp on PW products, just an innocent question.

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