Emj flight crew has pressurization malfunction and declares an emergency.

Attributes
ACN	574973
Time
Date	200302
Day	Wed
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : zid.artcc
State Reference	IN
Altitude	msl single value : 19000
Aircraft 1
Controlling Facilities	artcc : zid.artcc
Operator	common carrier : air carrier
Make Model Name	Embraer Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	climbout : vacating altitude cruise : level
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
ASRS Report	574973
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Events
Anomaly	aircraft equipment problem : less severe
Independent Detector	aircraft equipment other aircraft equipment : cabin alt alerter other flight crewa other flight crewb
Resolutory Action	controller : provided flight assist flight crew : declared emergency flight crew : overcame equipment problem
Consequence	Other
Supplementary
Problem Areas	Flight Crew Human Performance Aircraft
Primary Problem	Aircraft

Narrative:

Had pack #2 deferred. On climb out, first officer checked pressurization, in accordance with climb checklist and normal pressurization. After leveloff at FL190, we noted cabin pressure in amber range and climbing. First officer applied AOM1 procedures without initial success at stemming the rate of climb. I then requested lower form ATC due to cabin pressure problem. Controller asked if I was declaring an emergency and I replied in the affirmative. After commencing descent, the cabin altitude began descending. I then reported to ATC that we were pressurizing and they asked if I was canceling the emergency. I replied in the affirmative and accepted a leveloff at 16000 ft. After leveling off, I noted that the cabin stopped pressurizing and again requested descent. Once descent resumed, we again began pressurizing. We leveled off at 10000 ft with cabin pressure in the green. Differential pressure never got above 1.5 psi with manual pressurization in the full down position. We continued to a normal approach and landing at dayton.

Original NASA ASRS Text

Title: EMJ FLT CREW HAS PRESSURIZATION MALFUNCTION AND DECLARES AN EMER.

Narrative: HAD PACK #2 DEFERRED. ON CLBOUT, FO CHKED PRESSURIZATION, IN ACCORDANCE WITH CLB CHKLIST AND NORMAL PRESSURIZATION. AFTER LEVELOFF AT FL190, WE NOTED CABIN PRESSURE IN AMBER RANGE AND CLBING. FO APPLIED AOM1 PROCS WITHOUT INITIAL SUCCESS AT STEMMING THE RATE OF CLB. I THEN REQUESTED LOWER FORM ATC DUE TO CABIN PRESSURE PROB. CTLR ASKED IF I WAS DECLARING AN EMER AND I REPLIED IN THE AFFIRMATIVE. AFTER COMMENCING DSCNT, THE CABIN ALT BEGAN DSNDING. I THEN RPTED TO ATC THAT WE WERE PRESSURIZING AND THEY ASKED IF I WAS CANCELING THE EMER. I REPLIED IN THE AFFIRMATIVE AND ACCEPTED A LEVELOFF AT 16000 FT. AFTER LEVELING OFF, I NOTED THAT THE CABIN STOPPED PRESSURIZING AND AGAIN REQUESTED DSCNT. ONCE DSCNT RESUMED, WE AGAIN BEGAN PRESSURIZING. WE LEVELED OFF AT 10000 FT WITH CABIN PRESSURE IN THE GREEN. DIFFERENTIAL PRESSURE NEVER GOT ABOVE 1.5 PSI WITH MANUAL PRESSURIZATION IN THE FULL DOWN POS. WE CONTINUED TO A NORMAL APCH AND LNDG AT DAYTON.

Data retrieved from NASA's ASRS site as of July 2007 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.