Narrative:

It was a full flight with a jumpseater in the cockpit. We were delayed on departure by maintenance. The previous crew said the flight attendants heard a thumping sound from the right rear service door. Maintenance removed the right rear service door deflector. That deflector was put on cdl and we pushed from the gate 26 minutes late. We departed without incident. As we were getting close to our cruising altitude of 35;000 feet the aft flight attendant called up and said the right rear service door was loud. We promptly checked the status page on the mfd and it showed locked and green. We also checked the EICAS screen and the cabin altitude and differential pressure were stable and at normal levels. As soon as we reached 35;000 feet we felt our ears pop. We both looked at the EICAS screen to see the cabin altitude increasing rapidly. Within seconds it went from normal to above 17;000 feet. We donned our oxygen masks immediately. The cabin alt hi warning went off and we completed the [checklist]. We made an emergency descent to 10;000 feet. We completed the QRH items and when we reached 10;000 feet we told the passengers we were stabilized and level at 10;000 feet. We also said they can take their oxygen masks off and that we were diverting. We landed in ZZZ without incident.on the ground in ZZZ we called maintenance thru dispatch and logged the rapid decompression and passengers oxygen masks auto deployed in the [aircraft logbook]. During the postflight walkaround I noticed the right rear service door gasket had squeezed out thru the top of the door. As contract maintenance showed up at the plane he opened the right rear service door and noted that no bolts were in place to hold the door seal in place. Those are the same bolts that hold the door deflector plate to the outside of the service door. There was however clear packing tape present on the seal to apparently hold the seal in place until the door was closed.

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Original NASA ASRS Text

Title: The captain of a regional jet reported a complete loss of pressurization at the top of climb necessitating an emergency descent and a diversion to an alternate airfield. The peak cabin pressure was reported as 17;000 feet. There were no injuries. A post flight inspection revealed an improper repair to an external service door.

Narrative: It was a full flight with a jumpseater in the cockpit. We were delayed on departure by maintenance. The previous crew said the Flight attendants heard a thumping sound from the right rear service door. Maintenance removed the right rear service door deflector. That deflector was put on CDL and we pushed from the gate 26 minutes late. We departed without incident. As we were getting close to our cruising altitude of 35;000 feet the aft flight attendant called up and said the right rear service door was loud. We promptly checked the status page on the MFD and it showed locked and green. We also checked the EICAS screen and the Cabin Altitude and Differential Pressure were stable and at normal levels. As soon as we reached 35;000 feet we felt our ears pop. We both looked at the EICAS screen to see the cabin altitude increasing rapidly. Within seconds it went from normal to above 17;000 feet. We donned our oxygen masks immediately. The Cabin Alt Hi warning went off and we completed the [checklist]. We made an emergency descent to 10;000 feet. We completed the QRH items and when we reached 10;000 feet we told the passengers we were stabilized and level at 10;000 feet. We also said they can take their oxygen masks off and that we were diverting. We landed in ZZZ without incident.On the ground in ZZZ we called maintenance thru dispatch and logged the rapid decompression and Passengers Oxygen masks auto deployed in the [aircraft logbook]. During the postflight walkaround I noticed the right rear service door gasket had squeezed out thru the top of the door. As contract maintenance showed up at the plane he opened the right rear service door and noted that no bolts were in place to hold the door seal in place. Those are the same bolts that hold the door deflector plate to the outside of the service door. There was however clear packing tape present on the seal to apparently hold the seal in place until the door was closed.

Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.