(AP) The pilots' union for Avianca has announced a work slowdown to demand an increase in what its calls substandard wages at Colombia's principal airline.
The union says that starting Friday pilots will cause delays by halting radio calls about fueling, mobile stairs and other issues.
Union president Jaime Alberto Hernandez tells The Associated Press that passengers will experience "operational disorder"
He says pilots agreed in 2003 to givebacks when Avianca was passing through financial troubles but its pilots now average roughly half the monthly wage of a pilot in countries such as Brazil and Peru.
Avianca has a 153-plane fleet and about 100 destinations inside and outside of Colombia.
The company says it is adjusting flight schedules to account for expected delays.