Posts: 3133
Joined: Mon Nov 01, 2004 11:22 pm

Same AC Type Change-Of-Gauge

Sat Mar 12, 2005 6:27 pm

Hi All,

Whilst flying NW through DTW (a while back -- 3/30/04) I noticed that my flight to ORD (NW1505) was a continuation of a flight from, I beleive, a Canadian city.

As I had 3 hours to kill I did my share of wandering and gawking* I found NW1505 arriving at the other end of the concourse from where we were scheduled to depart (it arrived at A47 and we left from A17, IIRC).

I noted the number of the next flight departing from A47, went back to A17 and sure enough, the same flight was arriving at A17.

Both were DC9(-30s?), and each was operating the outbound portion of the other's inbound flight...

So the question is, and I know there must be a good reason for it, why did (as the flight doesn't seem to exist anymore) NW go through unloading/reloading cargo & checked luggage/make connecting pax trudge across the airport and all of the other stuff involved in a change of gauge just to get on another seemingly identical aircraft?. I could understand if they were going from a DC-9-30 to a 75 or something like that, but from a DC-9-30 to another DC-9-30? (And why not park them just a little bit closer together?)


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Posts: 2423
Joined: Fri Jul 28, 2000 3:19 am

RE: Same AC Type Change-Of-Gauge

Sat Mar 12, 2005 8:35 pm

A possible explanation is maintenance needs. At the end of the day one might have to end up at a station with specific maintenance capabilities. Swapping the aircraft at a hub is the most logical spot.