Crj-200 first officer on approach to ind in trail of a heavy reported speed dropped 10 kts which tri...

Attributes
ACN	1500481
Time
Date	201711
Local Time Of Day	0601-1200
Place
Locale Reference	IND.Airport
State Reference	IN
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	Regional Jet 200 ER/LR (CRJ200)
Operating Under FAR Part	Part 121
Flight Phase	Initial 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	First Officer Pilot Flying
Qualification	Flight Crew Air Transport Pilot (ATP)
Events
Anomaly	Deviation - Procedural Published Material / Policy Deviation - Speed All Types Inflight Event / Encounter Wake Vortex Encounter Inflight Event / Encounter Unstabilized Approach

Narrative:

Was on approach to ind on 23L following a heavy. Winds were slightly gusty. Was fully configured above 1500 ft AGL. ATC cleared us to 3000 ft which brought me below the glideslope path from an intermediate fix to final approach fix. Bugged approach speed. Saw speed decreasing slightly below vref but still within the bug. As I was correcting airspeed dropped approximately 10 kts and activated stick shaker. Disengaged the autopilot and added thrust to return to vref. Captain and I still felt stable as this occurred prior to the final approach fix in VMC conditions so we continued with the landing. Poor judgement when following a heavy. Should have bug vref + 5 as well as stayed above glide slope to avoid wake as much as possible. Always bug vref +5 when following a heavy.

Original NASA ASRS Text

Title: CRJ-200 First Officer on approach to IND in trail of a heavy reported speed dropped 10 kts which triggered the stick shaker in a possible wake vortex encounter.

Narrative: Was on approach to IND on 23L following a heavy. Winds were slightly gusty. Was fully configured above 1500 ft AGL. ATC cleared us to 3000 ft which brought me below the glideslope path from an intermediate fix to final approach fix. Bugged approach speed. Saw speed decreasing slightly below Vref but still within the bug. As I was correcting airspeed dropped approximately 10 kts and activated stick shaker. Disengaged the Autopilot and added thrust to return to Vref. Captain and I still felt stable as this occurred prior to the final approach fix in VMC conditions so we continued with the landing. Poor judgement when following a heavy. Should have bug Vref + 5 as well as stayed above glide slope to avoid wake as much as possible. Always bug Vref +5 when following a heavy.

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.

Crj-200 first officer on approach to ind in trail of a heavy reported speed dropped 10 kts which triggered the stick shaker in a possible wake vortex encounter.