Cpr light transport had to stop climb and descend to reset cabin pressurization control.

Attributes
ACN	175528
Time
Date	199104
Day	Fri
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : orl
State Reference	FL
Altitude	msl bound lower : 6000 msl bound upper : 14000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zjx
Operator	general aviation : corporate
Make Model Name	Light Transport, Low Wing, 2 Turbojet Eng
Flight Phase	climbout : intermediate altitude
Flight Plan	IFR
Person 1
Affiliation	Other
Function	flight crew : captain oversight : pic
Qualification	pilot : cfi pilot : atp
Experience	flight time last 90 days : 150 flight time total : 20000 flight time type : 50
ASRS Report	175528
Person 2
Affiliation	Other
Function	flight crew : first officer
Qualification	pilot : atp
Events
Anomaly	aircraft equipment problem : less severe non adherence : published procedure other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified
Resolutory Action	flight crew : overcame equipment problem flight crew : declared emergency
Consequence	Other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Light transport unable to comply with climb to assigned altitude of FL240 as emergency pressure system activated when cabin altitude rose above 8750'. Bleed air noise and heat distracted pilots. Aircraft had to descend to 6000' to sort out problem (bleed air switch needed to be reset). Cabin air switch missed on takeoff checklist, allowing cabin to climb unpressurized. Pilot's should be more familiar with aircraft system. Checklist challenge and response should be adhered to.

Original NASA ASRS Text

Title: CPR LTT HAD TO STOP CLIMB AND DESCEND TO RESET CABIN PRESSURIZATION CTL.

Narrative: LTT UNABLE TO COMPLY WITH CLB TO ASSIGNED ALT OF FL240 AS EMER PRESSURE SYS ACTIVATED WHEN CABIN ALT ROSE ABOVE 8750'. BLEED AIR NOISE AND HEAT DISTRACTED PLTS. ACFT HAD TO DSND TO 6000' TO SORT OUT PROB (BLEED AIR SWITCH NEEDED TO BE RESET). CABIN AIR SWITCH MISSED ON TKOF CHKLIST, ALLOWING CABIN TO CLB UNPRESSURIZED. PLT'S SHOULD BE MORE FAMILIAR WITH ACFT SYS. CHKLIST CHALLENGE AND RESPONSE SHOULD BE ADHERED TO.

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.