CalMac officials will be quizzed by a Scottish Parliament Committee next week after MSPs agreed to recall the ferry operator to Holyrood's Rural Economy and Connectivity Committee for further evidence.
Skye MSP Kate Forbes said she will be "looking for answers" following the recent disruption across the ferry network and particularly on the Mallaig to Armadale route – which clocked up over 100 cancellations in less than a month of this year's summer timetable.
It is understood that the REC Committee will take oral evidence from CalMac representatives at its next meeting on Wednesday 30 May.
Kate Forbes MSP, a member of the committee, said: "I am pleased that, as of Wednesday, MV Lord of the Isles has returned to the Mallaig-Armadale route and the network has returned to normal.
"It has been an exceptionally long period of disruption for ferry users right across the west coast.
"That is why it is important that senior CalMac managers are pressed for answers about what caused this extended disruption and how they intend to ensure it won't happen again.
"Of course, it is clear that more vessels are required, which is why the Scottish Government are building two new vessels at Ferguson's shipyard just now. That is on top of other new vessels over the last 10 years.
"I hope we will get ample opportunity with CalMac management in front of the Rural Economy and Connectivity Committee to find answers."