Crj-900 flight crew reported that the aircraft failed to pressurize during initial climb. The ground...

Narrative:

It all started at gate xx; when we noticed a 'service door unlocked' indication on the door's page. We recycled closing the service door a couple times without success after which we made the entry in the logbook and called maintenance. Two maintenance personnel arrived within 5 minutes and started working on it; they ended up deferring the service door and associated ground valve. Maintenance struggled with their computer system and it wasn't until XB19Z that they returned with the logbook after leaving around XA40Z without leaving explanations. Dropped the brake at XB23Z; we requested xxr to expedite the departure with an off of XB41Z. In the climb; around 8;500 feet; a caution message 'cabin alt' came to our attention. We [advised ATC of] our intentions to return to the field; we requested vectors with time to run the QRH. The aircraft was not pressurizing and the manual control procedure ineffective; we completed the unpressurized procedure to make sure it would be unpressurized upon landing. All appropriate communications with ATC; dispatch; operations; the cabin; and a brief PA were made. We landed at 79;000 pounds with a rate of 300 ft/min. Arrived at gate xy and entered the discrepancies in the maintenance logbook. As we walked off the aircraft for an aircraft swap; maintenance confirmed that the ground valve had not been correctly closed when following MEL directives.identification: in flight by EICAS messagecause: the ground valve was not properly closed by maintenancesuggestions: stress with maintenance personnel the implications of their work.

Original NASA ASRS Text

Title: CRJ-900 flight crew reported that the aircraft failed to pressurize during initial climb. The ground valve had not been fully closed by maintenance during work conducted on the aircraft prior to departure.

Narrative: It all started at Gate XX; when we noticed a 'Service door unlocked' indication on the door's page. We recycled closing the service door a couple times without success after which we made the entry in the logbook and called maintenance. Two maintenance personnel arrived within 5 minutes and started working on it; they ended up deferring the service door and associated ground valve. Maintenance struggled with their computer system and it wasn't until XB19Z that they returned with the logbook after leaving around XA40Z without leaving explanations. Dropped the brake at XB23Z; We requested XXR to expedite the departure with an off of XB41Z. In the climb; around 8;500 feet; a caution message 'Cabin Alt' came to our attention. We [advised ATC of] our intentions to return to the field; we requested vectors with time to run the QRH. The aircraft was not pressurizing and the manual control procedure ineffective; we completed the unpressurized procedure to make sure it would be unpressurized upon landing. All appropriate communications with ATC; dispatch; operations; the cabin; and a brief PA were made. We landed at 79;000 pounds with a rate of 300 ft/min. Arrived at Gate XY and entered the discrepancies in the maintenance logbook. As we walked off the aircraft for an aircraft swap; maintenance confirmed that the ground valve had not been correctly closed when following MEL directives.Identification: In flight by EICAS messageCause: The ground valve was not properly closed by maintenanceSuggestions: Stress with maintenance personnel the implications of their work.

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.

Attributes
ACN	1714952
Time
Date	202001
Local Time Of Day	1201-1800
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Flight Conditions	VMC
Light	Dusk
Aircraft 1
Make Model Name	Regional Jet 900 (CRJ900)
Operating Under FAR Part	Part 121
Flight Phase	Climb
Flight Plan	IFR
Component
Aircraft Component	Service/Access Door
Person 1
Function	Pilot Not Flying Captain
Qualification	Flight Crew Instrument Flight Crew Multiengine Flight Crew Air Transport Pilot (ATP)
Person 2
Function	Pilot Flying First Officer
Qualification	Flight Crew Air Transport Pilot (ATP) Flight Crew Instrument Flight Crew Multiengine
Events
Anomaly	Aircraft Equipment Problem Less Severe Deviation - Procedural MEL Deviation - Procedural Published Material / Policy

Crj-900 flight crew reported that the aircraft failed to pressurize during initial climb. The ground valve had not been fully closed by maintenance during work conducted on the aircraft prior to departure.