That was STS-51J, Atlantis first mission on October 1985. Payload was two Block III DSCS satellites on a single IUS.
And I just confirmed it, STS-61B, also an Atlantis mission flew the same OMS pod configuration (TPS-modified ROMS, standard TPS LOMS).
---------- Post added at 04:19 PM ---------- Previous post was at 04:09 PM ----------
And while on the subject of TPS, for all of the pre-ISS missions Discovery, Atlantis and Endeavour had the entire midbody and aft engine compartment sidewalls covered by AFRSI (quilted) blankets. When ISS assembly got near, the midbody sidewalls as well as aft engine compartment AFRSI was replaced by FRSI blankets.
This photo of Discovery in the DFRC MDD shows the original TPS configuration quite well. Disregard the OMS pods, they're the ALTA pods from Enterprise. Discovery's OMS pods were already KSC undergoing flight-preparations.
https://dl.dropboxusercontent.com/u/24122088/STS41D-036B-EC83-27080a-11.5.83.jpg
And this photo of Atlantis at the pad mid-era, shows the PLBD TPS configuration:
https://dl.dropboxusercontent.com/u/24122088/KSC-97EC-0711.jpg
The darker portions are the FRSI blankets. As you can see the TPS changed alot in order to reduce the weight of the orbiters.