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A PA31 was unable to get three green landing lights. After pumping the landing down the aircraft landed safely with two green lights. A faulty indication is suspected.
| Attributes | |
| ACN | 790979 |
| Time | |
| Date | 200806 |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : zzz.airport |
| State Reference | US |
| Altitude | agl single value : 1000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tower : zzz.tower |
| Operator | general aviation : instructional |
| Make Model Name | PA-31 Navajo Chieftan/Mojave/Navajo T1020 |
| Operating Under FAR Part | Part 91 |
| Flight Phase | descent : approach |
| Flight Plan | VFR |
| Person 1 | |
| Affiliation | other |
| Function | flight crew : single pilot |
| Qualification | pilot : multi engine pilot : instrument pilot : commercial pilot : cfi |
| Experience | flight time last 90 days : 40 flight time total : 1140 flight time type : 150 |
| ASRS Report | 790979 |
| Events | |
| Anomaly | aircraft equipment problem : less severe |
| Independent Detector | aircraft equipment other aircraft equipment : lndg gear warning light other flight crewa |
| Resolutory Action | flight crew : declared emergency flight crew : overcame equipment problem flight crew : landed in emergency condition |
| Supplementary | |
| Problem Areas | Aircraft |
| Primary Problem | Aircraft |
Narrative:
The training flight began with no incident. On a practice localizer 25 approach into ZZZ the gear was cycled down. We only received 2 out of 3 green lights. We cycled the gear up. The gear would not cycle up. We aborted the approach and began to head back to base at ZZZ1. We tried to cycle the gear down again and received no green lights. We proceeded to manually extend the gear with the hand pump. We were only able to receive 2 out of 3 green lights again. Aircraft control and a firm amount of pressure in the gear handle were indications we might just have an indication problem and that the gear probably was all 3 down and locked. At this point; we made a low pass at ZZZ1 where the tower and company observers said the gear appeared to be down and locked. Because we only had 2 green lights; however; we declared an emergency and proceeded to land at ZZZ1. The landing was uneventful. The gear was indeed down and locked and we taxied the plane back to base without further incident.
Original NASA ASRS Text
Title: A PA31 WAS UNABLE TO GET THREE GREEN LNDG LIGHTS. AFTER PUMPING THE LNDG DOWN THE ACFT LANDED SAFELY WITH TWO GREEN LIGHTS. A FAULTY INDICATION IS SUSPECTED.
Narrative: THE TRAINING FLT BEGAN WITH NO INCIDENT. ON A PRACTICE LOC 25 APCH INTO ZZZ THE GEAR WAS CYCLED DOWN. WE ONLY RECEIVED 2 OUT OF 3 GREEN LIGHTS. WE CYCLED THE GEAR UP. THE GEAR WOULD NOT CYCLE UP. WE ABORTED THE APCH AND BEGAN TO HEAD BACK TO BASE AT ZZZ1. WE TRIED TO CYCLE THE GEAR DOWN AGAIN AND RECEIVED NO GREEN LIGHTS. WE PROCEEDED TO MANUALLY EXTEND THE GEAR WITH THE HAND PUMP. WE WERE ONLY ABLE TO RECEIVE 2 OUT OF 3 GREEN LIGHTS AGAIN. ACFT CTL AND A FIRM AMOUNT OF PRESSURE IN THE GEAR HANDLE WERE INDICATIONS WE MIGHT JUST HAVE AN INDICATION PROB AND THAT THE GEAR PROBABLY WAS ALL 3 DOWN AND LOCKED. AT THIS POINT; WE MADE A LOW PASS AT ZZZ1 WHERE THE TWR AND COMPANY OBSERVERS SAID THE GEAR APPEARED TO BE DOWN AND LOCKED. BECAUSE WE ONLY HAD 2 GREEN LIGHTS; HOWEVER; WE DECLARED AN EMER AND PROCEEDED TO LAND AT ZZZ1. THE LNDG WAS UNEVENTFUL. THE GEAR WAS INDEED DOWN AND LOCKED AND WE TAXIED THE PLANE BACK TO BASE WITHOUT FURTHER INCIDENT.
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.