Narrative:

When I extended the landing gear on visual approach for runway 33R I observed the right main landing gear down light was not illuminated. I executed a missed approach and advised tower of the situation. I requested delay vectors while I troubleshot the problem using the aircraft's QRH. I also contacted company operations and notified them of the issue. Once established on delay vectors I used the QRH abnormal checklist entitled 'changing landing gear indicator light bulb'. After the checklist was complete the right main landing gear down lock light was still not illuminated. I continued with the QRH abnormal checklist entitled 'landing gear will not extend hydraulically'. As part of the procedure the landing gear was extended using nitrogen or 'blown down'. Finally I did a low approach over 33R while tower looked at my landing gear. Tower confirmed that all of the landing gear appeared to be down. I consulted with base maintenance and they agreed with the procedures I had done and had nothing else to recommend. I notified the passengers of the emergency extension of the landing gear; which the gear appeared to be down; and we would be landing shortly. I executed a normal landing; all landing gear remained down and locked; and I cleared the runway. I wrote up the landing gear discrepancy in the aircraft logbook and called our company maintenance control.

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Original NASA ASRS Text

Title: When the right main landing gear safe light failed to illuminate the pilot of a C-402 executed a missed approach; accomplished the associated QRH checklists; did a fly-by with the Tower for a visual inspection and ultimately landed safely despite the light remaining extinguished.

Narrative: When I extended the landing gear on visual approach for Runway 33R I observed the right main landing gear down light was not illuminated. I executed a missed approach and advised Tower of the situation. I requested delay vectors while I troubleshot the problem using the aircraft's QRH. I also contacted Company Operations and notified them of the issue. Once established on delay vectors I used the QRH Abnormal Checklist entitled 'Changing Landing Gear Indicator Light Bulb'. After the checklist was complete the right main landing gear down lock light was still not illuminated. I continued with the QRH Abnormal Checklist entitled 'Landing Gear Will Not Extend Hydraulically'. As part of the procedure the landing gear was extended using nitrogen or 'blown down'. Finally I did a low approach over 33R while Tower looked at my landing gear. Tower confirmed that all of the landing gear appeared to be down. I consulted with base Maintenance and they agreed with the procedures I had done and had nothing else to recommend. I notified the passengers of the emergency extension of the landing gear; which the gear appeared to be down; and we would be landing shortly. I executed a normal landing; all landing gear remained down and locked; and I cleared the runway. I wrote up the landing gear discrepancy in the aircraft logbook and called our company Maintenance Control.

Data retrieved from NASA's ASRS site as of July 2013 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.