	usair u and unit remain under moody s review moody s investors service inc said the mln dlrs of debt of usair group inc and its usair inc unit remain under review for possible downgrade the rating agency cited usair group s proposed uisition of piedmont aviation inc pie as well as trans world airlines inc s twa proposed cash merger with usair however the status of twa s bid for usair group is currently uncertain the u s transportation department has rejected twa s application to uire usair on deficiency grounds but twa has said it will file a revised application moody s noted under moody s review for possible downgrade are usair group s baa senior debt and baa subordinated debentures along with the usair unit s a senior debt and baa subordinated debentures moody s said it would examine the effects of the proposed mergers on usair group s financial measurements as well as potential damage to the company s financial flexibility because of the probability of increased debt service requirements reuter 
