Narrative:

We selected the gear down for landing, the nose gear did not illuminate. We tested the light and it was burned out. We have a gear warning horn and it did not sound. It appeared that it was just a burned out bulb, this system has two bulbs and they were both burned out. The problem is that there was no way to fully determine if the nose gear was down and locked. So we followed all associated chklst and prepared for an emergency lndgs. Upon landing the gear was stable and it is was just two burned out light bulbs. This system is not good because there is no backup way to determine if gear is down and locked. There is a system hydraulic page on our mfd (EFIS screen), why is not there gear indications here? They need a back up system to determine if gear is down and locked. Callback conversation with reporter revealed the following information: the reporter stated when the landing gear was extended the nose gear light did not illuminate and when tested did not light. The reporter said this aircraft has no secondary visual landing gear position indicating system. The reporter suggested the gear position should be available on the multi functional display unit. The reporter stated the bulbs were burned out.

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Original NASA ASRS Text

Title: A DORNIER 328 ON APCH AT 1500 FT AGL DECLARED AN EMER DUE TO NO NOSE GEAR POS INDICATION CAUSED BY TWO BURNED OUT BULBS.

Narrative: WE SELECTED THE GEAR DOWN FOR LNDG, THE NOSE GEAR DID NOT ILLUMINATE. WE TESTED THE LIGHT AND IT WAS BURNED OUT. WE HAVE A GEAR WARNING HORN AND IT DID NOT SOUND. IT APPEARED THAT IT WAS JUST A BURNED OUT BULB, THIS SYS HAS TWO BULBS AND THEY WERE BOTH BURNED OUT. THE PROB IS THAT THERE WAS NO WAY TO FULLY DETERMINE IF THE NOSE GEAR WAS DOWN AND LOCKED. SO WE FOLLOWED ALL ASSOCIATED CHKLST AND PREPARED FOR AN EMER LNDGS. UPON LNDG THE GEAR WAS STABLE AND IT IS WAS JUST TWO BURNED OUT LIGHT BULBS. THIS SYS IS NOT GOOD BECAUSE THERE IS NO BACKUP WAY TO DETERMINE IF GEAR IS DOWN AND LOCKED. THERE IS A SYS HYD PAGE ON OUR MFD (EFIS SCREEN), WHY IS NOT THERE GEAR INDICATIONS HERE? THEY NEED A BACK UP SYS TO DETERMINE IF GEAR IS DOWN AND LOCKED. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: THE RPTR STATED WHEN THE LNDG GEAR WAS EXTENDED THE NOSE GEAR LIGHT DID NOT ILLUMINATE AND WHEN TESTED DID NOT LIGHT. THE RPTR SAID THIS ACFT HAS NO SECONDARY VISUAL LNDG GEAR POS INDICATING SYS. THE RPTR SUGGESTED THE GEAR POS SHOULD BE AVAILABLE ON THE MULTI FUNCTIONAL DISPLAY UNIT. THE RPTR STATED THE BULBS WERE BURNED OUT.

Data retrieved from NASA's ASRS site as of July 2007 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.