They've written to government saying their are being "pressurised" to work through fatigue.
Fianna Fáil says serious safety concerns by air traffic controllers "cannot be whitewashed" by the Irish Aviation Authority.
Up to 160 staff have written to the government claiming they're being pressurised to work through fatigue by managers struggling to fill their rosters.
A bitter row about overtime, deepened by the sacking of a senior Irish Aviation Authority employee, has led to alarming tensions in the air traffic control systemhttps://t.co/0rOl7X0AKD
— Irish Independent (@Independent_ie) September 19, 2021
The Irish Aviation Authority is denying all claims made in a letter to the Transport Minister, insisting it's an "unofficial action by a small number of staff".
Fianna Fáil transport spokesman Timmy Dooley says too many air traffic controllers have signed it to be ignored.
Deputy Dooley is backing air traffic controllers requests
The Transport Minister says air traffic control rooms are properly staffed, following complaints from workers.
Minister Eamon Ryan says it's up to the labour relations institutions to address the concerns.

Gardaí Seize 38 E-Scooters And E-Bikes In Dublin Crackdown
EU Home Affairs Ministers Meet To Discuss Protection Of Borders From Illegal Migration
Plans For Protest Against Donald Trump's Expected Visit To Ireland Next Month
Hundreds Gather For Glen Hansard's Funeral This Afternoon
Sale Of Electric Vehicles Reach Record High In July
€8.5 Million Drug Seizure in Meath and Louth
Gardaí Detect Nearly 3,400 Speeding Offences During Bank Holiday Operation
Over 1,500 Drivers Caught Speeding During Bank Holiday Garda Operation