ANAC told Lusa News Agency it had called the airline’s managers to explain what was going on and to keep passengers properly informed, and it is continuing to monitor the situation.
The authority also said it was in permanent contact with the affected passengers who had got in touch to ask for help with refunds and compensation.
The Portuguese pilots’ union (SPAC) said it has been appealing to pilots to ‘work to rule’; to ask for overdue days off and not to accept flights on their days off and holidays as a means of pressuring the airline.
There have been scores of cancellations in recent weeks, Lusa News Agency says, without TAP giving any details.
The airline has said it “regrets” the cancellations and it would compensate the affected passengers.
At the end of March TAP said passengers whose flights were delayed or cancelled during the last week of that month would receive compensation.
Consumer watchdog DECO says it has received numerous complaints with regards to cancelled TAP flights.