posted 04-19-2019 10:54 AM               

Please use this topic to discuss SpaceX's seventeenth Dragon cargo flight to the International Space Station under NASA's Commercial Resupply Services (CRS) contract.

posted 04-19-2019 10:55 AM               

A SpaceX Dragon cargo spacecraft is now scheduled to launch at 4:22 a.m. EDT [0822 GMT] on Tuesday, April 30, on a Falcon 9 rocket from Space Launch Complex 40 at Cape Canaveral Air Force Station in Florida. This will be SpaceX's 17th Commercial Resupply Services contract mission to the International Space Station for NASA.

SpaceX will take advantage of the additional time to perform a static fire test and pre-flight checkouts. Falcon 9 and Dragon are on track to be flight ready for an earlier launch attempt, however, April 30 is the most viable date for both NASA and SpaceX due to station and orbital mechanics constraints.

posted 04-27-2019 11:05 AM               

Static fire test of Falcon 9 complete — targeting May 1 launch from Pad 40 in Florida for Dragon's seventeenth mission to the space station.

posted 04-29-2019 02:44 PM               

Monday morning (April 29), teams identified an issue with the International Space Station's electrical power system and are working to identify the root cause and restore full power to the system. There are no immediate concerns for the crew or the station.

An issue is being worked with a Main Bus Switching Unit (MBSU) that distributes electrical power to two of the eight power channels on the station. Flight controllers have been working to route power through the remaining six power channels. Electrical power generated by the station's solar arrays is fed to all station systems through these power channels.

Discussions are underway to determine any impacts to SpaceX's CRS-17 cargo resupply mission targeted for launch May 1.

posted 04-30-2019 11:33 AM               

NASA has requested SpaceX move off from May 1 for the launch of the company’s 17th commercial resupply mission to the International Space Station.

On April 29, the space station team identified an issue with one of the station’s Main Bus Switching Units that distributes power to two of the eight power channels on the station. There are no immediate concerns for the crew or the station. Teams are working on a plan to robotically replace the failed unit and restore full power to the station system. Additional information will be provided as it becomes available. The earliest possible launch opportunity is no earlier than Friday, May 3.

posted 05-02-2019 09:32 AM               

This morning, Robotics Ground Controllers in Mission Control Houston successfully completed an operation to remove a failed Main Bus Switching Unit-3 and replace it with a spare.

The MBSU in question had failed on April 29 and reduced the station's power supply by about 25%. There were no immediate concerns for the crew or the station. The crew had installed a series of jumpers in Node 1 following the failure to reroute power to experiments and hardware and ensure limited impact to continued station operations.

Since the successful replacement, the MBSU was powered up and checked out successfully with all station systems back to nominal power configuration, including redundant power to the Canadarm2 robotic arm.

NASA's commercial cargo provider SpaceX is targeting 3:11 a.m. EDT on Friday, May 3, for the launch of its 17th resupply mission to the International Space Station.

posted 05-03-2019 02:05 AM               

Standing down today due to an electrical issue on the Of Course I Still Love You droneship. Teams will also address the ground side helium leak before tomorrow's backup launch opportunity at 2:48 a.m. EDT, 6:48 UTC.

posted 05-04-2019 01:52 AM               

Falcon 9 booster has landed on Of Course I Still Love You!

Second stage engine burn complete. Dragon confirmed in good orbit.