Narrative:

Thinking we had it all under control again, we blasted off with a clearance to climb to 5000 ft. We had the FMC set for 210 KTS/3670, 250 KTS to 10000 ft, VNAV and LNAV were engaged and the captain was hand flying with the flight director. We were approaching 5000 ft, climbing at 250 KTS, when the big guy upstairs gave us one more lesson to reinforce his point. As the captain started to level off, the automatic throttles did not come back. They are sometimes slow, but by now the speed was building. I pointed this out to the captain, who commanded flch-250. This alternate mode did not work either, and since the speed was now over 270 KTS (at 5000 ft), and the airspeed bug stayed at 250 KTS throughout the incident, I manually retarded the throttles. The automatic throttles were still fighting me, so I clicked them off. I concentrated on getting the speed back below 250 KTS, while the captain concentrated on completing the leveloff at the proper altitude, xchking each other. This procedure worked fine, but it's amazing how fast a mid-weight B-757 will accelerate at low altitude with climb thrust! Lesson: be alert! We need more 'lerts.

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Original NASA ASRS Text

Title: SPD RESTR NOT COMPLIED WITH AT 5000 FT.

Narrative: THINKING WE HAD IT ALL UNDER CTL AGAIN, WE BLASTED OFF WITH A CLRNC TO CLB TO 5000 FT. WE HAD THE FMC SET FOR 210 KTS/3670, 250 KTS TO 10000 FT, VNAV AND LNAV WERE ENGAGED AND THE CAPT WAS HAND FLYING WITH THE FLT DIRECTOR. WE WERE APCHING 5000 FT, CLBING AT 250 KTS, WHEN THE BIG GUY UPSTAIRS GAVE US ONE MORE LESSON TO REINFORCE HIS POINT. AS THE CAPT STARTED TO LEVEL OFF, THE AUTO THROTTLES DID NOT COME BACK. THEY ARE SOMETIMES SLOW, BUT BY NOW THE SPD WAS BUILDING. I POINTED THIS OUT TO THE CAPT, WHO COMMANDED FLCH-250. THIS ALTERNATE MODE DID NOT WORK EITHER, AND SINCE THE SPD WAS NOW OVER 270 KTS (AT 5000 FT), AND THE AIRSPD BUG STAYED AT 250 KTS THROUGHOUT THE INCIDENT, I MANUALLY RETARDED THE THROTTLES. THE AUTO THROTTLES WERE STILL FIGHTING ME, SO I CLICKED THEM OFF. I CONCENTRATED ON GETTING THE SPD BACK BELOW 250 KTS, WHILE THE CAPT CONCENTRATED ON COMPLETING THE LEVELOFF AT THE PROPER ALT, XCHKING EACH OTHER. THIS PROC WORKED FINE, BUT IT'S AMAZING HOW FAST A MID-WT B-757 WILL ACCELERATE AT LOW ALT WITH CLB THRUST! LESSON: BE ALERT! WE NEED MORE 'LERTS.

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.