Flag the quest at Ayame (A) (Base Camp), who wants you to collect 3 key items in order to repair the barriers. These can be found in Repair Trunks scattered about the encampment (including behind the maw and past the ward). Once you have obtained all three items, talk to Raibaht (A), who is standing next to the Searing Ward.
Return to Ayame to complete the quest.
Ayame (A) (Central Command, Abyssea - Konschtat)
The searing ward that serves as the last line of defense against the fell hordes of the highlands has suffered critical damage in an attack. Procure repair materials from the base and deliver them to the engineer Raibaht before the fiends return!