Here's the latest story..
The FO is suspended pending the completion of the investigation, and the FA resigned prior to the flight..
FORT WORTH, Texas (CNN) -- Mesa Airlines fired one of its pilots after he tested positive for consumption of alcohol before boarding his flight from Little Rock, Arkansas, to Charlotte, North Carolina, an airline spokesman said Tuesday.
Spokesman Brian Gillman said that Capt. Peter Treanor, 29, had been with the company for two and a half years with no previous disciplinary actions against him.
"The captain has been terminated, effective last night," Gillman said. "We have a zero tolerance policy."
Treanor lives in Charlotte, according to a report filed by Little Rock police.
The Federal Aviation Administration and Mesa, one of 10 regional airlines that form US Airways Express, are investigating the incident, which occurred Friday when a screener thought he smelled alcohol on the breath of a flight attendant and alerted authorities.
When police responded, they smelled alcohol on Treanor's breath, but not on the flight attendant's, according to the police report.
"All the crew was taken off the plane and given Breathalyzer tests by the police," said FAA spokesman John Clabes.
Gillman said Treanor was the only crew member who tested positive, but the crew's first officer was suspended from flying until the conclusion of the investigation.
Gillman also confirmed reports that the flight attendant has resigned, but said he had tendered his resignation before the incident took place.
US Airways Express flies commuter planes between US Airways hubs and other cities in the United States, Canada and the Bahamas.
Mesa grounded the Little Rock-to-Charlotte flight, on a 50-seat Embraer 145 commuter jet owned and operated by Mesa Air Group in Phoenix, Arizona, and rerouted the passengers on another plane, Clabes said.
The incident follows two other cases involving commercial pilots allegedly drinking before flying.
On July 2, two America West pilots were arrested and charged with operating an aircraft and driving under the influence at Miami International Airport after failing a Breathalyzer test, police said.
A judge has set an October 21 trial date for the pilots -- who have been fired and ordered remain in their home state of Arizona.
On July 31, an Atlantic Southeast Airlines pilot under investigation for allegedly reporting to work intoxicated resigned, a spokesman for the Atlanta, Georgia-based airline said.
The pilot tried to board his plane in Wilmington, North Carolina, for a flight to Atlanta, but a security agent stopped him, suspecting he might be drunk, according to the airline. The pilot's name was not released.