They repaired one of the two tracks along Jamaica bay (No signals or third rail power yet though) so they could swap out the R32s for R46s so they could run less expensive One-Person-Train-Operation.
The first set of R46s arrived on Thursday, December 20th 2012, and was in service beginning on Friday December 21st, 2012. That day was the only day when a mix of R32s and R46s was running on the (H).
By Saturday, December 22nd, 2012, more R46s were brought over, and all of the R32s were removed from the (H) line.