Air carrier heavy transport temporary level off to solve aircraft pressurization problem causes possible less than standard separation with opposite direction traffic same altitude.

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Attributes
ACN	189037
Time
Date	199109
Day	Tue
Local Time Of Day	1801 To 2400
Place
Locale Reference	atc facility : acy
State Reference	NJ
Altitude	msl bound lower : 19000 msl bound upper : 19000
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Controlling Facilities	artcc : zdc
Operator	common carrier : air carrier
Make Model Name	Heavy Transport, Low Wing, 4 Turbojet Eng
Flight Phase	climbout : intermediate altitude
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 150 flight time total : 14000 flight time type : 4000
ASRS Report	189037
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Events
Anomaly	aircraft equipment problem : less severe conflict : airborne less severe non adherence : required legal separation non adherence : clearance non adherence : far
Independent Detector	aircraft equipment other aircraft equipment : unspecified other controllera
Resolutory Action	flight crew : overcame equipment problem other
Consequence	Other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Cleared to FL240, passing through FL190, the cabin pressure alarm went off (cabin was at 10000 ft). I leveled out climb (reduced it to 300 FPM for about 45 seconds) while we determined what the problem was. In my surprise I did not tell the first officer to advise center that we were temporarily leveling off/reducing rate of climb. Center advised us of traffic (which we saw at 5 mi or more) at 19000 ft.

Original NASA ASRS Text

Title: ACR HVT TEMPORARY LEVEL OFF TO SOLVE ACFT PRESSURIZATION PROBLEM CAUSES POSSIBLE LTSS WITH OPPOSITE DIRECTION TFC SAME ALT.

Narrative: CLRED TO FL240, PASSING THROUGH FL190, THE CABIN PRESSURE ALARM WENT OFF (CABIN WAS AT 10000 FT). I LEVELED OUT CLB (REDUCED IT TO 300 FPM FOR ABOUT 45 SECONDS) WHILE WE DETERMINED WHAT THE PROBLEM WAS. IN MY SURPRISE I DID NOT TELL THE FO TO ADVISE CENTER THAT WE WERE TEMPORARILY LEVELING OFF/REDUCING RATE OF CLB. CENTER ADVISED US OF TFC (WHICH WE SAW AT 5 MI OR MORE) AT 19000 FT.

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.