Some of the challenges entailed working with a gearbox technology out of production, not having the required special tooling, and the unavailability of spare parts. Through our Pennecon-Blackstone partnership, and with close collaboration with the gearbox OEM, we were able to special order expedited parts, identify the tooling required and fabricate the tooling, thereafter working together on the repair/assembly. It was necessary to carry out this level of work onshore due to the required machining and balancing involved. Once the gearbox repair was complete, inspections and sign-offs were made by Suncor and Lloyd’s Register. The gearbox was then shipped offshore, where Blackstone appointed a Technical Field Advisor to support the installation and commissioning.