Small transport flight crew reported they were unable to maintain ATC assigned speed on arrival into...

Attributes
ACN	1613446
Time
Date	201901
Local Time Of Day	1201-1800
Place
Locale Reference	DEN.Airport
State Reference	CO
Environment
Flight Conditions	VMC
Light	Dusk
Aircraft 1
Make Model Name	Small Transport
Operating Under FAR Part	Part 135
Flight Phase	Final Approach
Route In Use	Visual Approach
Flight Plan	IFR
Aircraft 2
Make Model Name	Heavy Transport
Operating Under FAR Part	Part 121
Flight Phase	Final Approach
Flight Plan	IFR
Person 1
Function	Pilot Not Flying Captain
Qualification	Flight Crew Commercial
Experience	Flight Crew Last 90 Days 150 Flight Crew Total 1400 Flight Crew Type 1000
Person 2
Function	First Officer Pilot Flying
Qualification	Flight Crew Instrument Flight Crew Multiengine Flight Crew Commercial
Events
Anomaly	Deviation - Procedural Clearance Deviation - Speed All Types Inflight Event / Encounter Weather / Turbulence Inflight Event / Encounter Wake Vortex Encounter

Narrative:

Upon initial descent from FL230 to larks intersection at 16000 feet we encountered continuous moderate turbulence and advised approach of the conditions and that we were unable to maintain best forward speed of 200 knots. Throughout the entire descent from 16000 until our glide slope intercept for 35L we were encountering continued turbulence and advised the controllers unable any faster. We were sequenced 5 miles behind a heavy aircraft and given the visual approach to land. Upon the descent out of 10000 we continued the moderate turbulence as well as a 50kt direct crosswind from ~260 heading from the left. We were told to maintain best forward speed before 6 mile final for spacing as aircraft were trailing. With our current conditions we were unable to do so with the full passenger count as well as the crosswinds and the wake turbulence from the other aircraft. We were given clearance to land and taxi off and told to copy a number for possible deviation. No aircraft went around after our landing nor were we told to go around. We believe if there was a problem with the spacing that we should have been told to break off course and go around so the larger; faster aircraft could land and we could get sequenced again.

Original NASA ASRS Text

Title: Small Transport flight crew reported they were unable to maintain ATC assigned speed on arrival into DEN because of wind shear; turbulence; and wake effects from the preceding Heavy Transport.

Narrative: Upon initial descent from FL230 to LARKS intersection at 16000 feet we encountered continuous moderate turbulence and advised Approach of the conditions and that we were unable to maintain best forward speed of 200 knots. Throughout the entire descent from 16000 until our glide slope intercept for 35L we were encountering continued turbulence and advised the Controllers unable any faster. We were sequenced 5 miles behind a heavy Aircraft and given the visual approach to land. Upon the descent out of 10000 we continued the moderate turbulence as well as a 50kt direct crosswind from ~260 heading from the left. We were told to maintain best forward speed before 6 mile final for spacing as aircraft were trailing. With our current conditions we were unable to do so with the full passenger count as well as the crosswinds and the wake turbulence from the other Aircraft. We were given clearance to land and taxi off and told to copy a number for possible deviation. No aircraft went around after our landing nor were we told to go around. We believe if there was a problem with the spacing that we should have been told to break off course and go around so the larger; faster aircraft could land and we could get sequenced again.

Data retrieved from NASA's ASRS site 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.

Small transport flight crew reported they were unable to maintain ATC assigned speed on arrival into den because of wind shear; turbulence; and wake effects from the preceding heavy transport.