Narrative:

I was pilot flying on approach. We were configured to gear down and flaps 20. I called for flaps 25 as we approached around 2;500 feet. As soon as flaps 25 was set; we got several chimes and caution messages. The autopilot kicked off along with auto throttles. I already had my hands on the controls at the time of the event. I noticed several caution messages displayed. They were left and right utility bus along with right gen off. The stack of messages was growing and my first instinct was that we were about to experience a complete electrical failure. I asked for the APU to be started. Since we were on final approach; we considered landing until we noticed that the landing gear indicators were not indicating down and green. I then realized we were getting a gear warning horn with the gear in the down position. The captain called for a go-around since the configuration of the aircraft could not be determined. We attempted to execute a go around procedure; however; the gear and flaps would not move. We decided to maintain configuration and get vectors from approach control. We established duties and the captain began to run the QRH. It appeared as though the utility busses reset but the right generator remained off line. We reloaded the approach and briefed what to expect with the malfunction. We decided to land at flaps 25 and adjusted the approach speeds. On final we noticed that we still did not have three green lights for the gear. We considered another go around but gas was now down to 8;000 pounds. I asked the captain to test the lights. He did and then rotated the indicator lights from bright to dim and back to bright again. For whatever reason; this action produced three green lights. The gear horn had also silenced. We landed the aircraft and taxied to the gate. We debriefed with maintenance. The mechanic found a left eec status message was displayed after block in. We did not have this message in flight.

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Original NASA ASRS Text

Title: B767-300 First Officer reported executing a go-around after experiencing multiple system issues; including landing gear indicators and generator failure.

Narrative: I was Pilot Flying on approach. We were configured to gear down and flaps 20. I called for flaps 25 as we approached around 2;500 feet. As soon as flaps 25 was set; we got several chimes and caution messages. The autopilot kicked off along with auto throttles. I already had my hands on the controls at the time of the event. I noticed several caution messages displayed. They were L and R utility bus along with R GEN off. The stack of messages was growing and my first instinct was that we were about to experience a complete electrical failure. I asked for the APU to be started. Since we were on final approach; we considered landing until we noticed that the landing gear indicators were not indicating down and green. I then realized we were getting a gear warning horn with the gear in the down position. The Captain called for a go-around since the configuration of the aircraft could not be determined. We attempted to execute a go around procedure; however; the gear and flaps would not move. We decided to maintain configuration and get vectors from Approach Control. We established duties and the Captain began to run the QRH. It appeared as though the utility busses reset but the right generator remained off line. We reloaded the approach and briefed what to expect with the malfunction. We decided to land at flaps 25 and adjusted the approach speeds. On final we noticed that we still did not have three green lights for the gear. We considered another go around but gas was now down to 8;000 pounds. I asked the Captain to test the lights. He did and then rotated the indicator lights from bright to dim and back to bright again. For whatever reason; this action produced three green lights. The gear horn had also silenced. We landed the aircraft and taxied to the gate. We debriefed with maintenance. The mechanic found a left EEC status message was displayed after block in. We did not have this message in flight.

Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.