<< >> NASA ASRS Report 416441, October 1998

A DC9-50 aircraft on initial climb declared an emergency and diverted due to the left main landing gear unsafe light illuminated with the gear handle up.

Attributes
ACN	416441
Time
Date	199810
Day	Mon
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : mem
State Reference	TN
Altitude	msl bound lower : 5000 msl bound upper : 5000
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Controlling Facilities	tracon : mem
Operator	common carrier : air carrier
Make Model Name	DC-8 50
Operating Under FAR Part	Part 121
Flight Phase	climbout : initial other other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : commercial pilot : atp pilot : flight engineer pilot : instrument
Experience	flight time last 90 days : 100 flight time total : 8000 flight time type : 1000
ASRS Report	416441
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : instrument
Events
Anomaly	aircraft equipment problem : critical
Independent Detector	aircraft equipment other aircraft equipment : unspecified other flight crewa
Resolutory Action	flight crew : declared emergency other
Consequence	Other
Supplementary
Primary Problem	Aircraft

Narrative:

After gear retraction, the left main gear unsafe light remained illuminated. Appropriate abnormal checklist accomplished with no affect. Dispatch and maintenance control were notified and return to mem was coordinated. Emergency equipment was requested to stand by. Landing and taxi to gate was uneventful. Callback conversation with reporter revealed the following information: the reporter stated the direct cause of the warning was unknown because a plane change was made and the crew departed before maintenance worked the aircraft. The reporter said it was a gear position indication problem because the landing gear operated ok.

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Original NASA ASRS Text

Title: A DC9-50 ACFT ON INITIAL CLB DECLARED AN EMER AND DIVERTED DUE TO THE L MAIN LNDG GEAR UNSAFE LIGHT ILLUMINATED WITH THE GEAR HANDLE UP.

Narrative: AFTER GEAR RETRACTION, THE L MAIN GEAR UNSAFE LIGHT REMAINED ILLUMINATED. APPROPRIATE ABNORMAL CHKLIST ACCOMPLISHED WITH NO AFFECT. DISPATCH AND MAINT CTL WERE NOTIFIED AND RETURN TO MEM WAS COORDINATED. EMER EQUIP WAS REQUESTED TO STAND BY. LNDG AND TAXI TO GATE WAS UNEVENTFUL. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: THE RPTR STATED THE DIRECT CAUSE OF THE WARNING WAS UNKNOWN BECAUSE A PLANE CHANGE WAS MADE AND THE CREW DEPARTED BEFORE MAINT WORKED THE ACFT. THE RPTR SAID IT WAS A GEAR POS INDICATION PROB BECAUSE THE LNDG GEAR OPERATED OK.

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.