EMB190 first officer reported being cleared to line up and wait with a B737 on short final and no ta...

Attributes
ACN	1374130
Time
Date	201607
Local Time Of Day	1201-1800
Place
Locale Reference	DCA.Airport
State Reference	DC
Environment
Light	Daylight
Aircraft 1
Make Model Name	EMB ERJ 190/195 ER/LR
Operating Under FAR Part	Part 121
Flight Phase	Taxi
Flight Plan	IFR
Aircraft 2
Make Model Name	B737 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	Final Approach
Flight Plan	IFR
Person 1
Function	First Officer Pilot Not Flying
Qualification	Flight Crew Air Transport Pilot (ATP)
Events
Anomaly	ATC Issue All Types Deviation - Procedural Published Material / Policy
Miss Distance	Horizontal 0 Vertical 200

Narrative:

We were taking off runway 01 dca during a relatively low traffic period. One aircraft was landing and as he crossed the threshold tower cleared us to line up and wait; advising there was a 737 on 4 mile final. After the landing aircraft exited we were expecting the immediate takeoff clearance but the frequency was silent. The captain and I remarked about this and he pointed at the TCAS display showing the aircraft at approximately 200 feet above us. He then asked tower 'takeoff clearance for XXXX?' tower immediately came on with 'XXXX- disregard- YYYY go around.' I then saw the 737 fly by above us and shortly thereafter we were cleared for takeoff. I did not hear anything else about the matter nor do I know if there was a loss of separation involved. It seems like there was a slow point in traffic flow and the tower may not have remembered about the aircraft on final. The few seconds we spent questioning why he hadn't cleared us for takeoff should have been used to query the tower immediately.

Original NASA ASRS Text

Title: EMB190 First Officer reported being cleared to line up and wait with a B737 on short final and no takeoff clearance received. The crew queried the Tower and the B737 was sent around.

Narrative: We were taking off Runway 01 DCA during a relatively low traffic period. One aircraft was landing and as he crossed the threshold Tower cleared us to line up and wait; advising there was a 737 on 4 mile final. After the landing aircraft exited we were expecting the immediate takeoff clearance but the frequency was silent. The captain and I remarked about this and he pointed at the TCAS display showing the aircraft at approximately 200 feet above us. He then asked tower 'Takeoff clearance for XXXX?' Tower immediately came on with 'XXXX- disregard- YYYY Go Around.' I then saw the 737 fly by above us and shortly thereafter we were cleared for takeoff. I did not hear anything else about the matter nor do I know if there was a loss of separation involved. It seems like there was a slow point in traffic flow and the tower may not have remembered about the aircraft on final. The few seconds we spent questioning why he hadn't cleared us for takeoff should have been used to query the tower immediately.

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.

EMB190 first officer reported being cleared to line up and wait with a B737 on short final and no takeoff clearance received. The crew queried the tower and the B737 was sent around.