Narrative:

Routine departure from lnk. Aircraft had 1 pack deferred, due to a control problem on the previous flight. On departure, the operable pack gave an overpressure caution light (as I xferred the bleeds from the APU to the engines) and the pack went off line. This meant that we were unpressurized and airplane began to leak down pressure. I told ATC that we would need to level off. Captain was flying and took the radios as I grabbed the QRH to deal with the pack. I got the pack going again per the QRH in less than 1 min. The aircraft pressurization recovered. As I looked up, I noticed that the airspeed was increasing through 270 KTS. I mentioned this to the captain who pulled the power back and started to climb to reduce airspeed. We reduced to 250 KTS and continued. Airspeed excursion lasted perhaps 30 seconds. Departure control said nothing and turned us over to center. Balance of flight was uneventful. Lesson learned: PF must fly the airplane even with the distraction of temporary loss of pressurization. Fly the airplane, deal with the problem, coordinate with ATC. There were no conflicts with any other aircraft.

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Original NASA ASRS Text

Title: CL65 CREW HAD A SPD DEV AFTER THE ACFT WAS MEL'ED WITH 1 PACK INOP AND THE OTHER PACK TRIPPED OFF.

Narrative: ROUTINE DEP FROM LNK. ACFT HAD 1 PACK DEFERRED, DUE TO A CTL PROB ON THE PREVIOUS FLT. ON DEP, THE OPERABLE PACK GAVE AN OVERPRESSURE CAUTION LIGHT (AS I XFERRED THE BLEEDS FROM THE APU TO THE ENGS) AND THE PACK WENT OFF LINE. THIS MEANT THAT WE WERE UNPRESSURIZED AND AIRPLANE BEGAN TO LEAK DOWN PRESSURE. I TOLD ATC THAT WE WOULD NEED TO LEVEL OFF. CAPT WAS FLYING AND TOOK THE RADIOS AS I GRABBED THE QRH TO DEAL WITH THE PACK. I GOT THE PACK GOING AGAIN PER THE QRH IN LESS THAN 1 MIN. THE ACFT PRESSURIZATION RECOVERED. AS I LOOKED UP, I NOTICED THAT THE AIRSPD WAS INCREASING THROUGH 270 KTS. I MENTIONED THIS TO THE CAPT WHO PULLED THE PWR BACK AND STARTED TO CLB TO REDUCE AIRSPD. WE REDUCED TO 250 KTS AND CONTINUED. AIRSPD EXCURSION LASTED PERHAPS 30 SECONDS. DEP CTL SAID NOTHING AND TURNED US OVER TO CTR. BAL OF FLT WAS UNEVENTFUL. LESSON LEARNED: PF MUST FLY THE AIRPLANE EVEN WITH THE DISTR OF TEMPORARY LOSS OF PRESSURIZATION. FLY THE AIRPLANE, DEAL WITH THE PROB, COORDINATE WITH ATC. THERE WERE NO CONFLICTS WITH ANY OTHER ACFT.

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.