C-FMZU, an Embraer 190-100 aircraft operated by Air Canada, was conducting flight ACA592 from Houston/George Bush Intercontinental (KIAH), TX to Toronto/Lester B. Pearson Intl (CYYZ), ON with 4 crew members and 65 passengers on board. Passing FL280 during the climb to cruising altitude, approximately 110 nm northeast of KIAH, the flight experienced continuous moderate turbulence.
As the flight passed through FL300, the turbulence became severe and the flight crew observed the vertical speed in excess of 2500 feet per minute. A higher level was requested, however it was denied by ATC due to heavy traffic at FL320. The flight crew levelled off at FL310 in continuous moderate turbulence, and subsequently climbed to FL350 a short while later.
The operator’s maintenance carried out a phase one inspection and found no faults. The aircraft was returned to service.