A pitts special pilot was unable to prevent a runway excursion when the right brake apparently locke...

Attributes
ACN	1047738
Time
Date	201211
Local Time Of Day	1201-1800
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	Pitts S-1 All Series
Operating Under FAR Part	Part 91
Flight Phase	Landing
Route In Use	None
Flight Plan	None
Component
Aircraft Component	Brake System
Person 1
Function	Pilot Flying Single Pilot
Qualification	Flight Crew Flight Engineer Flight Crew Air Transport Pilot (ATP) Flight Crew Flight Instructor Flight Crew Multiengine Flight Crew Instrument
Experience	Flight Crew Last 90 Days 65 Flight Crew Total 14000 Flight Crew Type 350
Events
Anomaly	Aircraft Equipment Problem Critical Ground Excursion Runway Inflight Event / Encounter Loss Of Aircraft Control

Narrative:

During landing rollout the aircraft pulled hard to the right. It appeared to have the right brake locked up. Efforts to arrest the right turn with left rudder inputs proved ineffective. It veered off the runway to the right side at about 20 to 30 mph. After traveling through the grass for about 50 to 70 feet the left main gear collapsed. The aircraft came to rest on the right main gear; the tailwheel and the left lower wing tip. There appears to be no damage other than to the left main gear. A tire skid mark from near the runway centerline to the runway edge follows the path the right main gear traveled. No tire marks were observed on the runway which would have matched the path of the left main gear.

Original NASA ASRS Text

Title: A Pitts Special pilot was unable to prevent a runway excursion when the right brake apparently locked up on the landing roll. The left main gear collapsed when the aircraft came to a halt off the runway.

Narrative: During landing rollout the aircraft pulled hard to the right. It appeared to have the right brake locked up. Efforts to arrest the right turn with left rudder inputs proved ineffective. It veered off the runway to the right side at about 20 to 30 mph. After traveling through the grass for about 50 to 70 feet the left main gear collapsed. The aircraft came to rest on the right main gear; the tailwheel and the left lower wing tip. There appears to be no damage other than to the left main gear. A tire skid mark from near the runway centerline to the runway edge follows the path the right main gear traveled. No tire marks were observed on the runway which would have matched the path of the left main gear.

Data retrieved from NASA's ASRS site as of July 2013 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.

A pitts special pilot was unable to prevent a runway excursion when the right brake apparently locked up on the landing roll. The left main gear collapsed when the aircraft came to a halt off the runway.