Type 7 Overhaul Program

Discussion relating to commuter rail, light rail, and subway operations of the MBTA.

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Re: Type 7 Overhaul Program

Postby F-line to Dudley via Park » Thu Oct 19, 2017 6:56 pm

Nothing major, but it's S.O.P. to separate out each generation of ordering batches with a designated pilot unit or two that gets extra-long lead time for turnaround in order to shake down any subtle evolutionary differences that may affect systems integration in the rebuild. Even the K-car rebuilds are front-loading 1 single BTC-4A (1997-era) pilot and 1 single BTC-4B (2001-era) pilot into the program with extended deadlines while they are still working on the second half of the BTC-4/CTC-4 ('91-era) roster.

For the 37's, the luxurious deadline for returning pilot 3714 probably has way more to do with the T's desire to keep foot pressed firmly on gas for getting all 3600 rebuilds back in service before winter than it has to do with actual technical differences with the 37's chewing up more time. This is simply the emphasis that keeps car availability at its absolute highest over winter, vs. potentially slowing down the pace of returnees by attempting to multitask work on the batch that's barely 20 years old and still running in better condition unrebuilt than the supposedly "newer" Bredas. Choice of priorities.
Last edited by CRail on Wed Oct 25, 2017 8:47 pm, edited 1 time in total.
Reason: Nesting quotes removed.
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Re: Type 7 Overhaul Program

Postby Type 7 3684 » Fri Oct 20, 2017 6:55 am

3705 is now withdrawn from service being prepped for the overhaul. Apparently it will be sent once the last 3600 car gets sent out.
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Re: Type 7 Overhaul Program

Postby F-line to Dudley via Park » Sat Oct 21, 2017 9:01 am

The early action on pulling 3705 into the rebuild queue means something broke on it this week and it was going to be OOS anyway.
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Re: Type 7 Overhaul Program

Postby Type 7 3684 » Tue Oct 24, 2017 4:10 pm

Yeah, now NETransit says that it may be repaired at Riverside early and they'll send another 3700 instead
Last edited by CRail on Wed Oct 25, 2017 8:46 pm, edited 1 time in total.
Reason: Unnecessary quote removed.
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Re: Type 7 Overhaul Program

Postby F-line to Dudley via Park » Tue Nov 07, 2017 5:27 pm

3647 yanked today for prep-to-ship. Final two non-rebuilds in service are puke-teals 3674 and 3682...with 3621, 3687, 3695 now back in-testing. The non-rebuilt 36's are almost certainly in their last 2 weeks of service.

3705, which very briefly appeared in the prep-to-ship line after it broke, apparently only needed a quick fix and is reported back in-service.
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Re: Type 7 Overhaul Program

Postby Type 7 3684 » Tue Nov 07, 2017 7:18 pm

Looks like 3652 is back too. There are also no more cars with pull cords on the Green Line.
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Re: Type 7 Overhaul Program

Postby F-line to Dudley via Park » Mon Nov 20, 2017 7:16 am

Bumper crop in the testing line: 3621, 3652, 3684, 3687, 3695 all jammed up looking to get cleared for return to service. 4 of those cars have been in-testing for 2 weeks now with 3684 being the only more-recent returnee, so Riverside is probably in a rush to clear that glut before staff vacations start later in the week.

This could indeed be the final week of service for remaining non-rebuilds 3674 and 3682 since it only takes 2 graduates from that overstuffed testing line to get both of them yanked.
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