Air India flew spare panel to Bengaluru and fitted it on the Boeing 787, which was later declared fit to fly.
The return flight from Bengaluru was, however, delayed by a good ten hours. The spare panel was taken out of a new Dreamliner aircraft, which was delivered a few days back by Boeing.
An AI official confirmed the incident and said the problem had been fixed.
In January, the US aviation regulator had grounded the Boeing 787s globally as they investigated a battery fire. AI recently had instances of oven overheating in its aircraft that led to the electric systems of the ovens being changed on all its B-787.