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PC12 pilot experiences landing gear indicator light failure during approach and goes around. After ensuring the gear is in fact down a normal landing ensues.
| Attributes | |
| ACN | 989927 |
| Time | |
| Date | 201201 |
| Local Time Of Day | 1201-1800 |
| Place | |
| Locale Reference | ZZZ.Airport |
| State Reference | US |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Make Model Name | PC-12 |
| Operating Under FAR Part | Part 91 |
| Flight Phase | Landing |
| Route In Use | Direct Visual Approach |
| Flight Plan | None |
| Person 1 | |
| Function | Pilot Flying |
| Qualification | Flight Crew Multiengine Flight Crew Commercial Flight Crew Flight Instructor Flight Crew Instrument |
| Experience | Flight Crew Last 90 Days 85 Flight Crew Total 2550 Flight Crew Type 2000 |
| Events | |
| Anomaly | Aircraft Equipment Problem Less Severe |
Narrative:
I; with the pilot owner of the aircraft; and 2:20 hours of fuel on board departed after receiving maintenance. The maintenance included a 100 hour inspection; prop overhaul; wingtip replacement and GNS 750 and GNS 650 garmin touch screen GPS installation. The aircraft was in maintenance for about 3 weeks. We conducted a test flight with an a&P tech on board with no issues. We dropped the tech off and departed VFR with no issues. After doing an extended downwind we then turned about a 5-6 mile final. The landing gear was selected down with all three red transit indicators illuminated but when gear operation was complete the left main and right main gear received no 'green' gear down and locked indication. Immediately executed go around and departed pattern to the north to troubleshoot. The emergency checklist was completed and included 2 gear cycles and 1 manual emergency gear extension. No change in gear indication was seen. At the time I believed it was a bulb issue as I could hear the hydraulic pump complete the cycle and feel the landing gear lock in place but because of the unknown gear light and lack of confirmation of gear position we decided to confirm gear position with tower and declare emergency. In the pc-12 the landing and taxi light are mounted on the landing gear. Those lights will only be illuminated when the gear is down and locked the tower confirmed the landing and taxi lights were on. This reinforced my feeling that we had a bulb issue. Yet because of the unknown quantity; per checklist; we then executed the emergency landing with main gear unlocked checklist. The landing was flawless and uneventful. I taxied off the high speed; shut down on the taxiway and called for the tug. Maintenance was on hand and bulbs were on the field. They replaced the bulb within 20 minutes and we were then receiving 3 green indications on the ground. I believe the cause of the problem was the aircraft coming out of maintenance with extensive avionics work. The gear selector and indicators are very close to the avionics and could have been damaged. The owner and I were very calm and considered every action. We took our time completing each checklist and discussed each decision before it was done.
Original NASA ASRS Text
Title: PC12 pilot experiences landing gear indicator light failure during approach and goes around. After ensuring the gear is in fact down a normal landing ensues.
Narrative: I; with the pilot owner of the aircraft; and 2:20 hours of fuel on board departed after receiving Maintenance. The Maintenance included a 100 Hour Inspection; Prop Overhaul; wingtip replacement and GNS 750 and GNS 650 Garmin Touch screen GPS installation. The aircraft was in maintenance for about 3 weeks. We conducted a test flight with an A&P Tech on board with no issues. We dropped the Tech off and departed VFR with no issues. After doing an extended downwind we then turned about a 5-6 mile final. The Landing Gear was selected down with all three red transit indicators illuminated but when gear operation was complete the left main and right main gear received no 'Green' gear down and locked indication. Immediately executed go around and departed pattern to the north to troubleshoot. The Emergency checklist was completed and included 2 gear cycles and 1 manual emergency gear extension. No change in gear indication was seen. At the time I believed it was a bulb issue as I could hear the hydraulic pump complete the cycle and feel the landing gear lock in place but because of the unknown gear light and lack of confirmation of gear position we decided to confirm gear position with Tower and declare emergency. In the PC-12 the landing and taxi light are mounted on the landing gear. Those lights will only be illuminated when the gear is down and locked the Tower confirmed the landing and taxi lights were on. This reinforced my feeling that we had a bulb issue. Yet because of the unknown quantity; per checklist; we then executed the emergency landing with main gear unlocked checklist. The landing was flawless and uneventful. I taxied off the high speed; shut down on the taxiway and called for the tug. Maintenance was on hand and bulbs were on the field. They replaced the bulb within 20 minutes and we were then receiving 3 green indications on the ground. I believe the cause of the problem was the aircraft coming out of maintenance with extensive avionics work. The gear selector and indicators are very close to the avionics and could have been damaged. The owner and I were very calm and considered every action. We took our time completing each checklist and discussed each decision before it was done.
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.