The TACA event was quite remarkable, as the photo shows. As I recall it, they changed one engine while the aircraft was still on the levee. Once they flew it off the levee back to MSY, the other engine was changed. The aircraft is now in service with SWA as N697SW.
As a result of the TACA event, the 737-300s (and -400s and -500s) had their engine spinners redesigned. The original spinners had a " > " shape, and it was discovered that that shallow angle allowed too much water into the core of the engine in heavy precip events. The spinners were redesigned and have a blunter " ) " shape, which deflects much more water into the fan/bypass section, and thus right out the back end.
Re: the UA DC-10 at DCA, the word that I had through the grapevine was that the flight was ORD-BWI and the dispatcher had designated MDT (Harrisburg PA) as the alternate, safely on the north side of an east west line of thunderstorms in the area. A cell was on the airport at BWI when they arrived, and rather than head for MDT, the crew (on their own, absent any communication with their dispatcher) elected to stay "on-line" and head for IAD. When weather and/or ATC delays at IAD caught them, they then decided to head for DCA, which wasn't an approved alternate per their Ops Specs for the DC-10. Had they diverted to anywhere but DCA, it would have been a non-event, since aircraft diversions for weather are not an uncommon occurence.
ALL views, opinions expressed are mine ONLY and are NOT representative of those shared by Southwest Airlines Co.