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B727 flight crew has red and green light showing for nose gear when extended. Makes missed approach, followed abnormal procedures. Declares emergency and lands.
| Attributes | |
| ACN | 325883 |
| Time | |
| Date | 199601 |
| Day | Wed |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : lax |
| State Reference | CA |
| Altitude | msl bound lower : 1200 msl bound upper : 1200 |
| Aircraft 1 | |
| Controlling Facilities | tower : lax |
| Operator | common carrier : air carrier |
| Make Model Name | Large Transport, Low Wing, 3 Turbojet Eng |
| Flight Phase | descent : approach |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : commercial pilot : atp pilot : flight engineer pilot : instrument |
| Experience | flight time last 90 days : 150 flight time total : 15000 flight time type : 10000 |
| ASRS Report | 325883 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | aircraft equipment problem : critical |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified other flight crewa |
| Resolutory Action | flight crew : declared emergency other other |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Aircraft |
Narrative:
When landing gear was extended, the landing gear indications were: left main gear 'green,' right main gear 'green,' nose gear 'green and red.' the landing gear was then retracted and extended again. The same indications of both main gear green (down and locked) indications and nose gear (down and locked) and red (gear unsafe) occurred. Flaps were then extended from the 25 degree position to the 30 degree position and the aural warning horn sounded indicating an unsafe gear. We executed a go around. We followed the abnormal procedures as specified in our pilots operating manual. The so and I both verified that the nose gear was down and locked, by visually inspecting the red alignment stripe through the nose gear viewing port. We declared an emergency. When returning to the airport for landing the red nose gear unsafe light extinguished and the nose gear green light remained illuminated. Landing on runway 25R at lax was accomplished normally. After taxiing clear of the runway the aircraft was stopped and ground crew installed the landing gear safety pins. Aircraft was then taxied to the gate normally.
Original NASA ASRS Text
Title: B727 FLC HAS RED AND GREEN LIGHT SHOWING FOR NOSE GEAR WHEN EXTENDED. MAKES MISSED APCH, FOLLOWED ABNORMAL PROCS. DECLARES EMER AND LANDS.
Narrative: WHEN LNDG GEAR WAS EXTENDED, THE LNDG GEAR INDICATIONS WERE: L MAIN GEAR 'GREEN,' R MAIN GEAR 'GREEN,' NOSE GEAR 'GREEN AND RED.' THE LNDG GEAR WAS THEN RETRACTED AND EXTENDED AGAIN. THE SAME INDICATIONS OF BOTH MAIN GEAR GREEN (DOWN AND LOCKED) INDICATIONS AND NOSE GEAR (DOWN AND LOCKED) AND RED (GEAR UNSAFE) OCCURRED. FLAPS WERE THEN EXTENDED FROM THE 25 DEG POS TO THE 30 DEG POS AND THE AURAL WARNING HORN SOUNDED INDICATING AN UNSAFE GEAR. WE EXECUTED A GAR. WE FOLLOWED THE ABNORMAL PROCS AS SPECIFIED IN OUR PLTS OPERATING MANUAL. THE SO AND I BOTH VERIFIED THAT THE NOSE GEAR WAS DOWN AND LOCKED, BY VISUALLY INSPECTING THE RED ALIGNMENT STRIPE THROUGH THE NOSE GEAR VIEWING PORT. WE DECLARED AN EMER. WHEN RETURNING TO THE ARPT FOR LNDG THE RED NOSE GEAR UNSAFE LIGHT EXTINGUISHED AND THE NOSE GEAR GREEN LIGHT REMAINED ILLUMINATED. LNDG ON RWY 25R AT LAX WAS ACCOMPLISHED NORMALLY. AFTER TAXIING CLR OF THE RWY THE ACFT WAS STOPPED AND GND CREW INSTALLED THE LNDG GEAR SAFETY PINS. ACFT WAS THEN TAXIED TO THE GATE NORMALLY.
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.