B737-800 flight crew reported a loss of cabin pressure during descent when thrust was reduced to idle. Flight crew continued descent and landed at destination airport.
Synopsis
B737-800 flight crew reported a loss of cabin pressure during descent when thrust was reduced to idle. Flight crew continued descent and landed at destination airport.
Narrative
On the ZZZZZ RNAV arrival into ZZZ; at FL310 over ZZZZZ1 the power went to idle for our VNAV descent. As the aircraft descended; both bleed lights came on. The FO (First Officer) the QRH procedure and each item was completed. Both crew members noticed the duct pressure at zero; so as the pilot flying I extended the speed brake to bring the power up. This did not work as the duct pressure remained at zero. At about 22;000 feet the cabin altitude horn came on. We advised ATC and were cleared down to 10;000 feet. At 10;000 feet I called the flight attendants to see if the masks had fallen; but they had not. While speaking with the flight attendants; it became apparent that only the pilots knew what had happened. We landed at ZZZ on runway XX without further incident.We should have advised tower at ZZZ; since they tried to slow us down and treat us as a normal flight.There was a recent write-up in the book with the same problem. Maybe more information could have been provided so maintenance could have found the problem.
Second reporter narrative
We were at FL310 on the ZZZZZ arrival; just outside of ZZZZZ1; and cleared to descend via the arrival into ZZZ. The aircraft's VNAV began its descent at ZZZZZ1. When the thrust came to idle both BLEED lights illuminated with a master caution. The captain was the PF (Pilot Flying) and I was the PM. The captain called for the QRH and I completed the checklist and consulted with the captain to ensure it was done properly. We then noticed the duct pressure had also gone to 0. The CA (Captain) pulled the speed brakes to get the thrust to come up to see if we would get any pressure which we did not. As we continued in the descent; we were at about FL220-FL200 and the cabin altitude horn came on. I checked the cabin alt and noted it was about 10;000 feet. At this point; we asked for an immediate descent to 10;000 feet. ATC inquired if was for a pressurization issue which I said yes and we advised ATC. We were cleared down to 8;000 ft and direct ZZZZZ2. We continued to ZZZ with no other noted issues.While ATC did a great job giving us priority and direct to the field; ZZZ tower was still taking off planes fairly close to us. They even pulled a CRJ on the runway with us at about the bridge and eventually got them to exit the runway when they realized we were a little too close.This was an issue that was written up a few days prior and is a reoccurring event.
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Source: NASA Aviation Safety Reporting System (public domain). Reports are voluntary submissions and are not verified by NASA.