Appendix : analysis of regular duty periods in September 1984.
Les Aubrais and Achères depots.
On the September 30th 1984 service, Les Aubrais depot used 32 BB 25500. Only three passage trains were included in this service so it was quite anecdotal:
• Short distance local train No 8917 between Cambraiand Somain ;
• Express train No 4630 from Les Aubraisto Paris Austerlitz in the morning ;
• Local train 6137 Orléans – Vierzon.
On slow freight trains between shunting yards, some nice services could be seen such as St Pierre des Corps to Valenton, Bobigny orVaires, Villeneuve toSomain, Le Havre to Villeneuve, Lille Délivranceto Villeneuve.
On bulk-freight trains, somegood services could also be noticed such as Vaires – St Pierre des Corps, St Pierre – Nantes, Valenton – Délivrance, Valenton – Lens, Vierzon – Noisy.
Also to be noted was train No 74200 between St Pierre des Corps and Vaires, palnned to be pulled in multiple units every night as well as empty cars train No 69922 between Les Aubrais and Lens.
Availability periods were planned in Bobigny, Vaires and Juvisy, lettig operational managers use this resource in the best possible way. It was true that the BB 25500 were almost good for any duty. This versatility was interesting for operational managers for optional traffic, including pilgrim trains from Northern France to Lourdes that they pulled up to Valenton or car-sleeper trains.
Still on the BB 25500 September 1984 service in Les Aubrais, it could be noticed that the accelerated freight traffic was far from negligible in their duties. They had a very intensive service from Creil to Bobigny, Juvisy, Trappes, Lille, Valenton, Corbehem near Douai (brand new automobiles trains).
Longest legs on accelerated freight trains included : Lille Champs de Mars to St Pierre des Corps or Vierzon, Creil to Vierzon, Armentières (North) to Valenton.
For the same September 30th 1984 service, here is a summary of regular service fir BB 25500 of Achères depot. Service was sprayed on a 49 days period!
As for Les Aubrais locomotives, passenger services were much reduced. It wasn’t their vocation and only a few trains were done, to use locomotives during availability periods or positon them better for following services :
• Local trains between Lille and Tourcoing, far away from their base ;
• Train No 8062 between Le Havre and Rouen ;
• Various empty passenger trains between Trappes and Paris-Montparnasse ;
• Few week-end trains like express No 3555 on Fridays between Le Mans and Nantes, or No 3556 in opposite direction on Thursdays and Fridays.
Achères BB 25500 services looked pretty similar to the Les Aubrais ones, i.e. a majority of interregional freight trains. On the Western side, they were regularly going to Trappes, Le Mans, Rennes, Nantes, Sotteville, le Havre. In the Paris area, as for Les Aubrais locomotives, they were frequently coming on Valenton, Villeneuve, Juvisy, Le Bourget, Vaires, Bobigny, Achères shunting yards.
On the Northern side, they were going up to Lille, Tergnier, Aulnoye, Lens. Several bulk-freight trains were planned with locomotives in multiple units, especially from Le Mans to Trappes, from Le Mans to Sotteville, from Bobigny to Trappes and back, from Sotteville or Le Havre to Valenton. Longest duty period took place with train No 66266 from Nantes at 7:08 AM to Le Bourget at 7:25 PM with stops in Le Mans and Trappes to add a second locomotive for multiple unit. The very same multiple unit of locomotives was then going back from Le Bourget to Rennes with train No BT 62372.
During the same period, BB 25500 of Montrouge depot were used on a 35 days duty period. Drivers from other regions only knew partially these locomotives. Their use was therefore concentrated on the Western region. In the Paris area, they were going to Creil, Achères, Villeneuve, Valenton, Noisy, Juvisy, Tolbiac but were not penetrating Northern region too deeply. On the opposite, their speed ability allowed to use them on more passenger trains, especially on the Montparnasse – Le Mans – Rennes or Nantes, Nantes – Tours, Angers – Le Mans, Rennes – Laval lines.