A crj flight crew utilized the wrong procedure for the pressurization system MEL number; which resul...

Attributes
ACN	902108
Time
Date	201008
Local Time Of Day	1801-2400
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Light	Night
Aircraft 1
Make Model Name	Regional Jet 200 ER/LR (CRJ200)
Operating Under FAR Part	Part 121
Flight Phase	Climb
Flight Plan	IFR
Component
Aircraft Component	Pressurization System
Person 1
Function	First Officer Pilot Not Flying
Qualification	Flight Crew Commercial
Events
Anomaly	Aircraft Equipment Problem Less Severe Deviation - Procedural Published Material / Policy

Narrative:

We mistakenly ran the wrong MEL procedure resulting in the deployment of oxygen masks in the cabin. No emergency was declared. We complied with QRH procedure for for cabin altitude message. Remainder of flight normal. A contributing factor was time constraints which caused us to be rushed and also an insufficient attention to detail; we did not read the MEL closely enough.to prevent a repeat I suggest flight crews read MEL instructions and MEL numbers very closely and make sure both crew members understand what is required or not required for each MEL item. If there are complicated mels make sure to set aside time to read them very carefully without any distractions or time pressure.

Original NASA ASRS Text

Title: A CRJ flight crew utilized the wrong procedure for the pressurization system MEL number; which resulted in the cabin not pressurizing and the ultimate release of the passenger oxygen masks.

Narrative: We mistakenly ran the wrong MEL procedure resulting in the deployment of oxygen masks in the cabin. No emergency was declared. We Complied with QRH procedure for for CABIN ALT message. Remainder of flight normal. A contributing factor was time constraints which caused us to be rushed and also an insufficient attention to detail; we did not read the MEL closely enough.To prevent a repeat I suggest flight crews read MEL instructions and MEL numbers very closely and make sure both crew members understand what is required or not required for each MEL item. If there are complicated MELs make sure to set aside time to read them very carefully without any distractions or time pressure.

Data retrieved from NASA's ASRS site as of April 2012 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.

A crj flight crew utilized the wrong procedure for the pressurization system MEL number; which resulted in the cabin not pressurizing and the ultimate release of the passenger oxygen masks.