I recently picked up a NW timetable from summer 2002 as part of my ongoing efforts to backfill details of my flight log. I was hoping to clarify which DC-9 variants I may have flown on in that time period. There are three different DC-9 codes used in the timetable, and I want to make sure I interpret them right.
DC9: I believe that this code was used for the DC-9-10.
D95: This code is used for the DC-9-50.
D9S: This code is the one I have questions about. The sources I have looked at say that it can represent the -30, -40, or -50 variants. So given that NW used both the D9S and D95 codes, can I assume that D9S is only used for 30s and 40s, or could the D9S still be operated by a -50? Did they use D9S as a placeholder in the timetable and then assign equipment based on load factors, or was there usually a particular variant always scheduled?
Anyway, I flew on many NW DC-9s between 2002 and 2004 when I was living in RST. I flew the RST-MSP route several times, and the 2002 timetable shows D9S as the only variant on that route. I'm assuming that this was most likely the -30, the most common variant in the NW fleet. Anybody know for sure what variant was normally used on this route?
I flew MSP-YUL-MSP in May 2004, and I recall that the flights were on DC-9 equipment. The 2002 timetable shows D9S for MSP-YUL, but I can't find any hard information about what was used in 2004. Does anybody know for sure?
The last one that I'm really interested in is a flight from 2007. I flew NW1430, MSP-ATL, on 20 Nov 2007. I still have the Orbitz itinerary in my email, and it specifies D9S equipment. Does anybody have any insight as to which variant this would have most likely been?
Thanks for your help!