SPD DEV ON APCH PROC; IAP ILS APCH.

Narrative

COPLT WAS FLYING. ACFT WAS ON AUTOPLT. AS ACFT INTERCEPTED GS; AIRSPD INCREASED SLOWLY FROM ASSIGNED SPD OF 170 KIAS TO 180 KIAS. AS AIRSPD HIT 180 KTS; COPLT TOOK ACFT OFF AUTOPLT AND SLOWED BACK TO 170 KTS. AS WE STABILIZED AT 170 KTS; ORD APCH CTL INSTRUCTED US TO SLOW TO 170 KTS. THIS DEV OCCURRED DUE TO 2 PROBS: COPLT IS CONSISTENTLY SLOPPY WITH APCH AIRSPD CTL AND DOES NOT ACCEPT COMMENTS VERY WELL. THIS MAKES IT VERY DIFFICULT TO COMMUNICATE WITH HIM WHEN HE EITHER DEVIATES FROM SOP; OR TAKES SOME ACTION WHICH COULD BE ACCOMPLISHED IN A BETTER MANNER. THIS MLG HAS A SERIOUS DESIGN FLAW. WHEN ATTEMPTING TO ESTABLISH THE GS WITH THE AUTOPLT ENGAGED; THE ACFT FREQUENTLY EXCEEDS THE COMMANDED SPD FOR 2 REASONS. ENGS ARE ALWAYS IN HIGH SPD IDLE WHEN THE ACFT AND FMC'S WERE DESIGNED FOR LOW SPD IDLE DURING A GS INTERCEPT. ALSO; AUTOPLT GS CAPTURE INVOLVES A 'BRACKETING MANEUVER.' THIS CAUSES ACFT TO GET SLIGHTLY HIGH ON GS BEFORE INITIATING DSCNT FOR INTERCEPT. THE RESULT IS A DIVE OF 1500-1700 FPM BACK DOWN TO THE GS. THUS; A HOT AIRSPD/DEV. BY ANTICIPATING THIS EVENT; IT IS CTLABLE. ONE LAST COMMENT. I DON'T KNOW IF IT IS ME; OR THE YOUNGER GENERATION OR JUST THE ERA WE ARE IN. I HAVE NOTICED A PROB WITH YOUNGER PLTS -- THEY DON'T BELIEVE WHAT I TELL THEM (I.E.; WE ARE REQUIRED TO STAY AT OR ABOVE THE GS/VASI; STAY AT/BELOW 200 KTS IN AN ATA; ORD APCH WILL/MIGHT VIOLATE YOU IF BUST YOUR AIRSPD BY 10 KTS). IT SEEMS THAT UNLESS THEY'VE SEEN IT IN WRITING; THEY DON'T BELIEVE ME -- EVEN IF THEY SEE IT THEY STILL; AT TIMES; THINK THAT IT DOESN'T APPLY. MAYBE IT'S BECAUSE I APPEAR TO BE A YOUNG CAPT. DON'T KNOW; BUT SURE GETTING TIRED OF IT.