EMB ERJ 145 ER/LR
Flight Crew Air Transport Pilot (ATP)
Other / Unknown
Aircraft Equipment Problem Less Severe; Deviation - Speed All Types; Deviation / Discrepancy - Procedural FAR; Deviation / Discrepancy - Procedural Published Material / Policy; Inflight Event / Encounter Weather / Turbulence
Flight Crew Became Reoriented
Aircraft; Human Factors
We were operating with PACK 1 MEL'd. As a result; the heat in the cockpit became overwhelming and reached temperatures of 41 degrees C (106 degrees F). We leveled off at 9;000 FT and briefly were distracted as a result of the extreme temperature and accelerated to approximately 272 KTS. We immediately recognized the overspeed and corrected back to 250 KTS. We messaged Dispatch with the heat issue and recommended the aircraft be taken out of service until the PACK was fixed...we received the response; 'how are the passengers; are they comfy.' We continued the flight without incident. On the ground; I contacted Maintenance Control to possibly coordinate a proactive aircraft swap for the next crew. I informed them that MEL's such as these should not be allowed in these types of conditions as the heat became unbearable. Again; MEL'd PACKS should not be acceptable this time of year in extreme heat situations.
EMB145 Captain reports being dispatched with an inoperative number one pack and experiencing cockpit temperatures up to 41 degrees C. During level off at 9;000 FT; airspeed is allowed to accelerate above 250 KTS.