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Air carrier has gear unsafe light in up position, lights ok when gear extended, but suffers gear door damage on landing due mechanical failure.
| Attributes | |
| ACN | 151198 |
| Time | |
| Date | 199007 |
| Day | Fri |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : ord |
| State Reference | IL |
| Altitude | agl bound lower : 0 agl bound upper : 2000 |
| Environment | |
| Flight Conditions | Mixed |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tower : ord |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Large Transport, Low Wing, 2 Turbojet Eng |
| Flight Phase | landing other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 210 flight time total : 10700 flight time type : 210 |
| ASRS Report | 151198 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | aircraft equipment problem : critical other anomaly other |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified other flight crewa |
| Resolutory Action | flight crew : declared emergency none taken : unable |
| Consequence | other |
| Supplementary | |
| Primary Problem | Aircraft |
| Air Traffic Incident | other |
Narrative:
After normal takeoff from mdw, gear uplatch check was performed. Result of check was left main gear unsafe light came on and gear door open light came on. Recycled landing gear down which resulted in 3 green lights on, unsafe lights out, and gear door open light on. Landing gear was retracted with no change in previously stated. Because of runway length and safety considerations landing was planned for ord. With emergency equipment standing by, landing at ord was normal. After landing, maintenance advised nut had fallen off a sequencing valve which caused the unsafe indication found after the uplatch check. This resulted in left main gear door contacting runway after landing. No emergency was declared.
Original NASA ASRS Text
Title: ACR HAS GEAR UNSAFE LIGHT IN UP POSITION, LIGHTS OK WHEN GEAR EXTENDED, BUT SUFFERS GEAR DOOR DAMAGE ON LNDG DUE MECHANICAL FAILURE.
Narrative: AFTER NORMAL TKOF FROM MDW, GEAR UPLATCH CHK WAS PERFORMED. RESULT OF CHK WAS L MAIN GEAR UNSAFE LIGHT CAME ON AND GEAR DOOR OPEN LIGHT CAME ON. RECYCLED LNDG GEAR DOWN WHICH RESULTED IN 3 GREEN LIGHTS ON, UNSAFE LIGHTS OUT, AND GEAR DOOR OPEN LIGHT ON. LNDG GEAR WAS RETRACTED WITH NO CHANGE IN PREVIOUSLY STATED. BECAUSE OF RWY LENGTH AND SAFETY CONSIDERATIONS LNDG WAS PLANNED FOR ORD. WITH EMER EQUIP STANDING BY, LNDG AT ORD WAS NORMAL. AFTER LNDG, MAINT ADVISED NUT HAD FALLEN OFF A SEQUENCING VALVE WHICH CAUSED THE UNSAFE INDICATION FOUND AFTER THE UPLATCH CHK. THIS RESULTED IN L MAIN GEAR DOOR CONTACTING RWY AFTER LNDG. NO EMER WAS DECLARED.
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.