05:48-06:24 Lots of nan's on the ADS rack GPDAQ housekeeping during turbulence. I think we have a PPS issue. This is extremely important due to we need PLWC as clean as possible when passing through storm systems with high liquid water content.
06:43 Moved ADS rack GPDAQ PPS down a port directly next to DSM304 PPS.
06:43 Started seeing IRIG Status issues on DSM304 and GPDAQ issues continued.
07:21 Found what is in the attached picture. Not sure if that is by design or not.
07:27 Moved both of the GPDAQ PPS and DSM304 PPS to the top ports. I believe that hole is the issue. There is a connector that has fallen back and is shorting out the bottom row of the PPS distribution box. ADS rack GPDAQ, DSM303, and DSM304 PPS's are all on the top row now. There is a flight day tomorrow. We will pull the PPS distribution box on the maintenance day after and inspect. After I did this, the last two hours of flight had no issues with this.
3 Comments
Kyle Holden
Jun 06, 2025Kyle Holden
Jun 06, 20256Jun25
Flight Tech: Kyle
Takeoff: 01:39
Landing: 09:04
05:34 Refilled R5 Dry ice.
05:48-06:24 Lots of nan's on the ADS rack GPDAQ housekeeping during turbulence. I think we have a PPS issue. This is extremely important due to we need PLWC as clean as possible when passing through storm systems with high liquid water content.
06:43 Moved ADS rack GPDAQ PPS down a port directly next to DSM304 PPS.
06:43 Started seeing IRIG Status issues on DSM304 and GPDAQ issues continued.
07:21 Found what is in the attached picture. Not sure if that is by design or not.
07:27 Moved both of the GPDAQ PPS and DSM304 PPS to the top ports. I believe that hole is the issue. There is a connector that has fallen back and is shorting out the bottom row of the PPS distribution box. ADS rack GPDAQ, DSM303, and DSM304 PPS's are all on the top row now. There is a flight day tomorrow. We will pull the PPS distribution box on the maintenance day after and inspect. After I did this, the last two hours of flight had no issues with this.
Christopher Webster
Jun 06, 2025IRIG into dsm303 was clean.