Crj-900 captain reported that an error was suspected in the first officer's airspeed indication and ...

Narrative:

Hand flown visual approach at night. At approximately 4 miles from touchdown; first officer stated; 'you're slow.' I checked my airspeed indicator and speed was right at bottom of bug. I stated; 'I'm right on'. Two more calls from the first officer approximately 15 seconds apart stating I was slow. First officer never stated how slow. I saw nothing except minor deviations of plus or minus 2-3 knots and prompt; timely corrections. I suspected there may be instrument error as aircraft had pitot system drained prior to flight. Approach was very smooth; on course and on glide path. At approximately 2 miles and 800 feet; first officer called tower and stated we were going around. For a moment; I thought first officer stated this over the intercom communication system and then tower responded with go around instructions. As PIC; I immediately called tower and asked him to disregard the transmission. Tower complied and reissued landing clearance. Aircraft continued on a stable approach to touchdown and uneventful taxi to gate.

Original NASA ASRS Text

Title: CRJ-900 Captain reported that an error was suspected in the First Officer's airspeed indication and therefore the landing was continued after the First Officer called for a go-around.

Narrative: Hand flown visual approach at night. At approximately 4 miles from touchdown; First Officer stated; 'you're slow.' I checked my airspeed indicator and speed was right at bottom of bug. I stated; 'I'm right on'. Two more calls from the First Officer approximately 15 seconds apart stating I was slow. First Officer never stated how slow. I saw nothing except minor deviations of plus or minus 2-3 knots and prompt; timely corrections. I suspected there may be instrument error as aircraft had pitot system drained prior to flight. Approach was very smooth; on course and on glide path. At approximately 2 miles and 800 feet; First Officer called tower and stated we were going around. For a moment; I thought First Officer stated this over the Intercom Communication System and then Tower responded with go around instructions. As PIC; I immediately called Tower and asked him to disregard the transmission. Tower complied and reissued landing clearance. Aircraft continued on a stable approach to touchdown and uneventful taxi to gate.

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.

Attributes
ACN	1506807
Time
Date	201712
Local Time Of Day	1201-1800
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Make Model Name	Regional Jet 900 (CRJ900)
Operating Under FAR Part	Part 121
Flight Phase	Final Approach Initial Approach
Route In Use	Visual Approach
Flight Plan	IFR
Person 1
Function	Captain Pilot Flying
Qualification	Flight Crew Air Transport Pilot (ATP)
Events
Anomaly	Deviation - Procedural Published Material / Policy

Crj-900 captain reported that an error was suspected in the first officer's airspeed indication and therefore the landing was continued after the first officer called for a go-around.