Wehave already engaged an independent expert to conduct a thoroughinvestigation into the cause of the outage, however the likely causeappears to have been a failed oil pressure sensor on a backupgenerator. We regret any inconvenience caused to our clients or theircustomers." The outage affected Air NZ's flight processing function and electronic check-in and staff had to revert to manual functions.Fyfe's email statement also said in regards to Air New Zealand staff's efforts: "The end result was almost textbook handling of a major disruption, which is a far cry from IBM's effort."IBM issued a statement that said the power failure happened during a regular scheduled maintenance check, when the back-up generator experienced power failure.