AN ACR FLC HAS TO DSND TO ITS PREVIOUSLY ASSIGNED ALT WHEN IT ALLOWS THE ACFT TO GET SO SLOW DURING ITS CLB TO FL370 THAT IT NEARLY STALLS.

Narrative

AFTER REACHING THE INITIAL CRUISE ALT OF FL330 ON A FLT FROM SARASOTA; FL; TO NEWARK; NJ; THE CAPT REQUESTED A CLB TO FL370. THE ACFT WT WAS AT THE MAX FOR THE CLB TO FL370; BUT WITHIN THE OPERATING LIMITS. WE WERE CLRED TO CLB TO FL370 BY ZJX AND THE CAPT BEGAN BY COMMANDING AN INITIAL CLB RATE OF ABOUT 1500 FPM. AT THAT TIME MY ATTN WAS DIRECTED TO THE FLT PLAN BECAUSE I WAS LOOKING FOR A 2 MIN ERROR IN THE ENRTE CALCULATIONS. THE CAPT BEGAN TO EAT HIS CREW MEAL AT ABOUT THE SAME TIME. MY ATTN WAS COMPLETELY ON THE PAPERWORK. AFTER ABOUT 3-4 MINS I NOTICED THE ACFT WAS BEGINNING TO ROCK BACK AND FORTH ALMOST LIKE A MILD DUTCH ROLL. I LOOKED AT THE AIRSPD AND IT INDICATED ABOUT 220 KTS AND .66 MACH AND GETTING SLOWER FAIRLY RAPIDLY. I DIRECTED THE CAPT'S ATTN TO THIS; AT WHICH HE QUICKLY REDUCED THE CLB RATE TO ABOUT 500 FPM. THE AIRSPD BECAME EVEN SLOWER TO ABOUT 205 KTS AND THE ROCKING MORE PRONOUNCED. HE THEN LEVELED THE ACFT AT FL365; BUT IT WOULD NOT ACCELERATE. THE AIRSPD SLOWED EVEN MORE; AT WHICH TIME THE CAPT LOWERED THE NOSE TO GAIN AIRSPD. AT ABOUT FL360 THE CTLR ASKED IF WE HAD A PROB; AT WHICH I STATED WE HAD TO DSND NOW. HE GAVE US A TURN OF ABOUT 20-30 DEGS TO THE L FOR TFC AT FL350. WHEN THE CAPT MADE THE TURN THE ACFT STARTED TO SHUDDER AND I BELIEVE THAT WE WERE VERY CLOSE TO A STALL. WE CONTINUED THE DSCNT TO FL330 AT WHICH TIME THE ACFT ACCELERATED TO NORMAL SPD AND THE PERFORMANCE ALSO RETURNED TO NORMAL. SUPPLEMENTAL INFO FROM ACN 327457: AS OUR ATTN DURING THIS TIME WAS DIRECTED TOWARD MAINTAINING ACFT CTL AND ACCELERATING THE ACFT; WE WERE NOT TIMELY IN ADVISING CTR THAT WE WERE NO LONGER CLBING.