Reggaebird From Jamaica, joined Nov 1999, 1174 posts, RR: 0 Posted (6 months 3 weeks 5 days 23 hours ago) and read 3985 times:
I was out plane spotting and saw a BA 744 landing, immediately followed by an AF 744. I made videos of both landings and, upon review, noticed that the flaps look different on the two birds. So I thought I would ask the following. Other than engine type-related variances, are there any major mechanical variances in the wings/flaps of the BA and AF fleets? I thought that all 744s were pretty much the same, with the possible exception of the 744ER.
The visual difference in flaps that I am referring to can be seen at 0:24 (BA) and 2:24 (AF) in the video link below.
jetmech From Australia, joined Mar 2006, 2617 posts, RR: 53 Reply 5, posted (6 months 3 weeks 5 days 2 hours ago) and read 2691 times:
Quoting Reggaebird (Reply 2): That begs the question why the different flap configurations for the same flying conditions?
As stated by 747classic, and amongst other reasons, the particular procedure for each airline has a lot to do with landing flap choice.
One airline made the choice to do flap 25 landings as a standard procedure, to reduce noise fees as well as TR and flap maintenance. Page 125 of the following also states that flap 25 landings were chosen to put more energy into the brakes, which actually decreased wear rates.