B737 leaves runway at iad when directional control is lost.

Attributes
ACN	459503
Time
Date	199912
Day	Thu
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : iad.airport
State Reference	VA
Altitude	agl single value : 0
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	B737-200
Operating Under FAR Part	Part 121
Navigation In Use	other other
Flight Phase	landing : roll
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 206 flight time total : 7185 flight time type : 1763
ASRS Report	459503
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : multi engine pilot : instrument pilot : commercial
Events
Anomaly	aircraft equipment problem : critical excursion : runway incursion : taxiway other anomaly
Independent Detector	other flight crewa
Resolutory Action	none taken : unable
Consequence	other
Supplementary
Problem Areas	Aircraft
Primary Problem	Aircraft

Narrative:

Everything was normal until landing rollout. Aircraft tended to drift to left side of runway 19R and did not respond to right rudder or brake. We departed the runway just prior to taxiway Y7, went through grass and stopped on taxiway Y. Suspect major problems with aircraft braking system. Could have possibly used nosewheel steering but thought I was too fast.

Original NASA ASRS Text

Title: B737 LEAVES RWY AT IAD WHEN DIRECTIONAL CTL IS LOST.

Narrative: EVERYTHING WAS NORMAL UNTIL LNDG ROLLOUT. ACFT TENDED TO DRIFT TO L SIDE OF RWY 19R AND DID NOT RESPOND TO R RUDDER OR BRAKE. WE DEPARTED THE RWY JUST PRIOR TO TXWY Y7, WENT THROUGH GRASS AND STOPPED ON TXWY Y. SUSPECT MAJOR PROBS WITH ACFT BRAKING SYS. COULD HAVE POSSIBLY USED NOSEWHEEL STEERING BUT THOUGHT I WAS TOO FAST.

Data retrieved from NASA's ASRS site as of July 2007 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.