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A P180 declared an emergency for an unsafe nose gear indication. A safe indication occurred during visual vectors. Reporter believes down limit switch failed.
| Attributes | |
| ACN | 772952 |
| Time | |
| Date | 200801 |
| Local Time Of Day | 0001 To 0600 |
| Place | |
| Locale Reference | airport : zzz.airport |
| State Reference | US |
| Altitude | msl single value : 1500 |
| Environment | |
| Flight Conditions | VMC |
| Weather Elements | Turbulence |
| Light | Night |
| Aircraft 1 | |
| Controlling Facilities | tracon : zzz.tracon |
| Make Model Name | P180 |
| Operating Under FAR Part | Part 91 |
| Flight Phase | descent : approach |
| Flight Plan | IFR |
| Person 1 | |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 150 flight time total : 6000 flight time type : 1800 |
| ASRS Report | 772952 |
| Events | |
| Anomaly | aircraft equipment problem : less severe |
| Independent Detector | aircraft equipment other aircraft equipment : nose gear warning other flight crewa |
| Resolutory Action | aircraft : equipment problem dissipated flight crew : declared emergency flight crew : overcame equipment problem |
| Supplementary | |
| Problem Areas | Aircraft |
| Primary Problem | Aircraft |
Narrative:
During a localizer approach to ZZZ we did not get a green down and lock indication on our nose gear. After doing the emergency checklist and notifying ATC and our company; we decided to declare an emergency. While being vectored to fly the localizer for a gear down check from the control tower; we noticed the nose gear indication was green; and all other gear indications were normal. We canceled the tower fly-by. During radar vectors to join the approach in gusty conditions; we lost our autoplt altitude hold function. We advised ATC and completed the approach to a safe landing. I believe that the indication problem was caused by a faulty down limit switch.
Original NASA ASRS Text
Title: A P180 DECLARED AN EMER FOR AN UNSAFE NOSE GEAR INDICATION. A SAFE INDICATION OCCURRED DURING VISUAL VECTORS. REPORTER BELIEVES DOWN LIMIT SWITCH FAILED.
Narrative: DURING A LOC APCH TO ZZZ WE DID NOT GET A GREEN DOWN AND LOCK INDICATION ON OUR NOSE GEAR. AFTER DOING THE EMER CHKLIST AND NOTIFYING ATC AND OUR COMPANY; WE DECIDED TO DECLARE AN EMER. WHILE BEING VECTORED TO FLY THE LOC FOR A GEAR DOWN CHK FROM THE CTL TWR; WE NOTICED THE NOSE GEAR INDICATION WAS GREEN; AND ALL OTHER GEAR INDICATIONS WERE NORMAL. WE CANCELED THE TWR FLY-BY. DURING RADAR VECTORS TO JOIN THE APCH IN GUSTY CONDITIONS; WE LOST OUR AUTOPLT ALT HOLD FUNCTION. WE ADVISED ATC AND COMPLETED THE APCH TO A SAFE LNDG. I BELIEVE THAT THE INDICATION PROB WAS CAUSED BY A FAULTY DOWN LIMIT SWITCH.
Data retrieved from NASA's ASRS site as of May 2009 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.