Narrative:

On approach into ZZZ runway xx the right main gear light did not illuminate after gear down was selected. A go around was initiated and I recycled the gear. Second time the gear came down the right main light still did not illuminate. I pressed the push to test button and no light was noticed. We informed tower we were sorting things out and would circle to the north of the airport and let them know when we were ready to come in. We followed the QRH to change the light bulb for the right main; however when testing it after; we noticed the left main was not illuminating. We decided to change the left light bulb however the first officer pulled the gear cube out before I could pull the circuit breaker again. Reset the gear cube and only the right main would illuminate. We tried pulling the gear cube out again to replace the lights however the gear cube would not come out. We tried multiple times to get the gear cube out to no success. At this point we contacted [operations control] to discuss the next steps. It was decided to blow the gear down and follow the appropriate checklists for unconfirmed gear down (left main and nose). [Coordinated] with tower and emergency equipment was rolled as a precaution. We landed safely with no further incident on runway xy. The passengers were shuttled from the aircraft to the terminal with their baggage while the aircraft was towed to our hangar. Not following QRH when a checklist had to be repeated i.e. Second time changing light bulb did not pull circuit breaker (circuit breaker) before pulling gear cube out.

Related reports:

Google
 

Original NASA ASRS Text

Title: C402 flight crew reported failure to follow QRH with unsafe landing gear indications.

Narrative: On approach into ZZZ runway XX the right main gear light did not illuminate after gear down was selected. A go around was initiated and I recycled the gear. Second time the gear came down the right main light still did not illuminate. I pressed the push to test button and no light was noticed. We informed tower we were sorting things out and would circle to the north of the airport and let them know when we were ready to come in. We followed the QRH to change the light bulb for the right main; however when testing it after; we noticed the left main was not illuminating. We decided to change the left light bulb however the First Officer pulled the gear cube out before I could pull the circuit breaker again. Reset the gear cube and only the right main would illuminate. We tried pulling the gear cube out again to replace the lights however the gear cube would not come out. We tried multiple times to get the gear cube out to no success. At this point we contacted [Operations Control] to discuss the next steps. It was decided to blow the gear down and follow the appropriate checklists for unconfirmed gear down (left main and nose). [Coordinated] with Tower and emergency equipment was rolled as a precaution. We landed safely with no further incident on runway XY. The passengers were shuttled from the aircraft to the terminal with their baggage while the aircraft was towed to our hangar. Not following QRH when a checklist had to be repeated i.e. second time changing light bulb did not pull CB (Circuit Breaker) before pulling gear cube out.

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.