Incident Overview
On 21 June 2017, at approximately 11:33 UTC, during a flight from LGKK to LGPR, a Boeing 737-800 (designated B738) experienced a generator failure on engine number 2. This triggered a MASTER CAUTION - ELEC - RIGHT SOURCE OFF warning in the cockpit.
Crew Actions
In response to the warning, the flight crew executed the Non-Normal Checklist (NNC) titled 'SOURCE OFF'. As part of the procedure, they started the auxiliary power unit (APU) and connected its generator to the aircraft's electrical system. The crew continued the flight to the destination airport, where the aircraft landed safely without further incident.
Maintenance Actions
Following the flight, the captain notified the Maintenance Control Center (MCC) and made an entry in the pilot defect log (PDT). Technical personnel performed a system check in accordance with Fault Isolation Manual (FIM) task 24.2.1 Task 801, which did not identify any fault. After starting engine number 2, a test of the generator was conducted, but the generator did not engage. The generator was subsequently disconnected, and the aircraft was released for flight under Minimum Equipment List (MEL) item 24.1.2 (Engine Driven Generator). On 24 June 2017, the generator was replaced following Aircraft Maintenance Manual (AMM) task 24-21 - 81-000. A post-replacement test was successful, and the aircraft was returned to unrestricted service.
Cause
The cause of the incident was a failure of the generator on engine number 2.