B737NG captain reported responding to an RA departing iad.

Attributes
ACN	1714450
Time
Date	201912
Local Time Of Day	1201-1800
Place
Locale Reference	IAD.Airport
State Reference	DC
Environment
Flight Conditions	VMC
Aircraft 1
Make Model Name	B737 Next Generation Undifferentiated
Operating Under FAR Part	Part 121
Flight Phase	Climb
Flight Plan	IFR
Aircraft 2
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Person 1
Function	Captain Pilot Flying
Qualification	Flight Crew Air Transport Pilot (ATP) Flight Crew Multiengine Flight Crew Instrument
Experience	Flight Crew Last 90 Days 138.92 Flight Crew Total 17500 Flight Crew Type 1897.82
Events
Anomaly	Conflict Airborne Conflict

Narrative:

During climbout from iad on the JDUBB2 departure we were given a climb from 3;000 to 10;000 feet. The aircraft was very light. Rate of climb was higher than usual given the light weight; in excess of 4;000 feet per minute. TCAS alerted us to traffic passing above at 10;000 [feet] with a 'traffic; traffic' call followed immediately by a resolution advisory to 'level off.' I complied by lowering the pitch attitude to just below the resolution pitch advisory indication on the ADI. The clear of conflict annunciation quickly followed and the climb to 10;000 feet was completed. Our aircraft was never closer than 3;000 feet to the target aircraft; we never completely leveled off or deviated from an assigned altitude.

Original NASA ASRS Text

Title: B737NG Captain reported responding to an RA departing IAD.

Narrative: During climbout from IAD on the JDUBB2 departure we were given a climb from 3;000 to 10;000 feet. The aircraft was very light. Rate of climb was higher than usual given the light weight; in excess of 4;000 feet per minute. TCAS alerted us to traffic passing above at 10;000 [feet] with a 'Traffic; Traffic' call followed immediately by a Resolution Advisory to 'Level Off.' I complied by lowering the pitch attitude to just below the Resolution Pitch Advisory indication on the ADI. The Clear of Conflict annunciation quickly followed and the climb to 10;000 feet was completed. Our aircraft was never closer than 3;000 feet to the target aircraft; we never completely leveled off or deviated from an assigned altitude.

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.