Date: 201304
Local time of day: 0601-1200
Location: ZZZ.Airport, US
Flight conditions: VMC
Light: Daylight
Aircraft: Regional Jet 700 ER/LR (CRJ700)
Operator: Air Carrier
Operating under: Part 121
Flight plan: IFR
Mission: Passenger
Flight phase: Takeoff / Launch
ATC / advisory: Tower ZZZ
Aircraft component: Wheels/Tires/Brakes
Component problem: Failed
Reporter organization: Air Carrier
Reporter function: First Officer; Pilot Not Flying
Human factors: Situational Awareness; Training / Qualification
Anomaly: Aircraft Equipment Problem Critical; Deviation / Discrepancy - Procedural Published Material / Policy
Detector: Person Flight Crew
When detected: In-flight
Result: Aircraft Aircraft Damaged; Flight Crew Rejected Takeoff; General Maintenance Action
Contributing factors: Human Factors; Aircraft
Primary problem: Aircraft

Narrative: Captain was Pilot Flying.  We departed the gate; completed appropriate checklists and procedures as normal; taxied to the runway and at the time we were number 3 for departure.  After being cleared for takeoff; we took the runway and completed before takeoff check.  Aircraft accelerated normally; made the 80 knot callout; V1 callout 5 knots prior to V1 as we are trained.  Right at V1 we heard a large 'boom' from the rear of the aircraft; nose of aircraft pitched down and to the right.  Captain retarded the throttles; deployed reversers; and extended flight spoilers while trying to return the aircraft to the runway centerline and stop the aircraft as quickly as possible.  I (Pilot Monitoring) told ATC we were aborting; made my standard call outs (spoilers; two reverse; 90 knots; etc.).  Captain was able to slow the aircraft down and make turnoff [near the end of the 10;000 foot runway].  ATC was asking questions as we taxied off; I told them to standby as we dealt with rejected takeoff.  Captain set the parking brake and we analyzed the situation (completed rejected takeoff checklist).  We agreed it was most likely a blown tire on the right side of the aircraft.  I wanted to get out and check to make sure the brakes were not on fire in case we needed to evacuate the passengers.  Captain agreed and I opened the cabin door for a visual inspection.  I noticed that the outboard wheel was smoking slightly; but at the time it didn't appear to be getting worse or notice any fire.  Captain worked the radios coordinated with ATC; Maintenance; and Operations to get the passengers back to the Terminal and the aircraft off the taxiway.   Operations and Fire Rescue arrived; Fire team agreed that the wheel did not pose a threat and we waited for buses to arrive to deplane the passengers.  We stayed with Maintenance for a short while; contacted the Chief Pilot; and Dispatch; then drove back to the Terminal in Airport Operations truck. I still have no idea why the tires blew.  They were completely shredded once we got off the aircraft.  I had  been doing walk arounds on that aircraft for almost two days and remember the inboard main tire looking fairly new. Both were in good condition the previous 3 flights we did in that aircraft.




Synopsis: CRJ-700 First Officer reports a rejected takeoff at or above V1 due to possible tire failure.  After clearing the runway the right main tires are found to be shredded.