Narrative:

I was lca with student IOE on lander arrival into den. Upon check-in with den TRACON, was given speed 220 KTS and 13000 ft with handoff to final. TRACON controller no speed was assigned, but was given altitude of 10000 ft at 8 mi from leets (FAF) for 16. Student wanted to slow and I agreed since we were well inside 3:1 for planning a stabilized approach, being 3000 ft over marker altitude and at 220 KTS only in a position for flaps 1 degree. We slowed to 190 KTS to configure flr flaps 15 degrees and prepare for the descent when assigned. The approach controller asked our speed at the 7 mi FAF point and then informed us that we were not to slow on our own. The radio was very busy and we were unable to convey our slowing to the controller. Upon arrival, the csr informed us the TRACON wanted to talk to us which I called. He said he was trying to plug us into a 9 mi hole for wake turbulence, but the final controller never told us to maintain a speed, and we were violating the ability to become stabilized in the approach at 7 mi and 43000 ft high. At fden we are assigned a speed inside the gate but that speed of 230 KTS or 210 KTS is never mentioned again as we are on downwind and base, so with no further ATC assigned speeds, we slow on late downwind or base to be in a position to stabilize. Radio is too busy to convey every airspeed change late in approach. Told controller foqa shows 777 unstabilized approach in den a lot.

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Original NASA ASRS Text

Title: B777 CREW, ON 12 MI FINAL, SLOWED IN PREPARATION FOR APCH, AGAINST ATC'S WISHES.

Narrative: I WAS LCA WITH STUDENT IOE ON LANDER ARR INTO DEN. UPON CHK-IN WITH DEN TRACON, WAS GIVEN SPD 220 KTS AND 13000 FT WITH HDOF TO FINAL. TRACON CTLR NO SPD WAS ASSIGNED, BUT WAS GIVEN ALT OF 10000 FT AT 8 MI FROM LEETS (FAF) FOR 16. STUDENT WANTED TO SLOW AND I AGREED SINCE WE WERE WELL INSIDE 3:1 FOR PLANNING A STABILIZED APCH, BEING 3000 FT OVER MARKER ALT AND AT 220 KTS ONLY IN A POS FOR FLAPS 1 DEG. WE SLOWED TO 190 KTS TO CONFIGURE FLR FLAPS 15 DEGS AND PREPARE FOR THE DSCNT WHEN ASSIGNED. THE APCH CTLR ASKED OUR SPD AT THE 7 MI FAF POINT AND THEN INFORMED US THAT WE WERE NOT TO SLOW ON OUR OWN. THE RADIO WAS VERY BUSY AND WE WERE UNABLE TO CONVEY OUR SLOWING TO THE CTLR. UPON ARR, THE CSR INFORMED US THE TRACON WANTED TO TALK TO US WHICH I CALLED. HE SAID HE WAS TRYING TO PLUG US INTO A 9 MI HOLE FOR WAKE TURB, BUT THE FINAL CTLR NEVER TOLD US TO MAINTAIN A SPD, AND WE WERE VIOLATING THE ABILITY TO BECOME STABILIZED IN THE APCH AT 7 MI AND 43000 FT HIGH. AT FDEN WE ARE ASSIGNED A SPD INSIDE THE GATE BUT THAT SPD OF 230 KTS OR 210 KTS IS NEVER MENTIONED AGAIN AS WE ARE ON DOWNWIND AND BASE, SO WITH NO FURTHER ATC ASSIGNED SPDS, WE SLOW ON LATE DOWNWIND OR BASE TO BE IN A POS TO STABILIZE. RADIO IS TOO BUSY TO CONVEY EVERY AIRSPD CHANGE LATE IN APCH. TOLD CTLR FOQA SHOWS 777 UNSTABILIZED APCH IN DEN A LOT.

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.