Lunav,
Re For CaptainsandL: Autoslats operation is between flaps 1 and 5 .From AOM:
In most 737s yes, but not all. I know the thread title is for Classics but there will be some NG readers here. On the 1/200s (not Adv) only the outboard slats were on the autoslat system, and it only kicked in at flap 25. On the new SFPs it is all the slats but it works from flap 1 to 25 inclusive.
Dont get too hung up on the numbers, it is the principle which matters. I.e. autoslat moves slats from ext to full ext & back again. The PTU assists if you have no B pressure.
Your original questions were:
-OPERATE means retraction AND extension? Answer yes.
-Could you make an example of a scenario where the PTU will start working? (a/c configuration, flap lever position and movement) Answer only as given in the criteria you gave in your original post. But if you are looking for ways to retract the LEDs after an altn extn, there are ways but they are complicated and/or risky. Best stick to the QRH unless the chips are really down.
Regards
S&L