Following the success of the 1990 expedition two members of the ‘Gunung Api Connection’ expedition returned to the Park in 1991 to ‘tidy up some loose ends’.
Alan and Becky Weight returned to the Park during August 1991 with the intention of checking out some leads in Racer Cave. These revealed some minor extensions with some links between previously discovered passages. Although 400m of passages were surveyed nothing of major consequence was revealed.
Another entrance was visited, Palm Cave, which could be seen from Batu Bungan Penan settlement. This had been visited previously by locals but the route up to it was far from simple. Penan guides cut a track over steep, loose, pinnacled and heavily vegetated limestone to the entrance which was almost at the highest point on this arm of Api. The 20m wide entrance led into a large well decorated chamber before dipping down a slippery slope to a 10m drop. Owing to the vertical nature of the way on no further exploration took place during this expedition although information was passed to the Mulu Caves ‘91 expedition who took up the challenge.