Jazz Air parent reports $22.7-million fourth-quarter

  Chorus Aviation, parent of Jazz Air, has earned $22.7 million in its fourth quarter compared with a loss of $11.9 million a year ago when the airline recorded an $8.9-million loss on derivatives.   Excluding unrealized foreign exchange gains and losses on long-term debt and finance leases, Chorus reported an adjusted profit of $19.6 million compared with a loss of $12.4 million in the last three months of 2010. Operating revenue was also up to $407.7 million from $392.7 million a year ago due to higher costs for fuel, offset by lower airport and navigational fees and de-icing costs.