A B767-300 on touchdown had landing gear warning light and aural warning for 5 seconds on taxi in to gate had EICAS gear door warning. Found left main gear forward drag strut disconnected from spindle on the gear sequence valve.

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Attributes
ACN	676716
Time
Date	200510
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : zzz.airport
State Reference	US
Altitude	agl single value : 0
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	B767-300 and 300 ER
Operating Under FAR Part	Part 121
Flight Phase	ground : taxi landing : roll
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : flight engineer pilot : commercial pilot : atp
Experience	flight time last 90 days : 500 flight time total : 11093 flight time type : 1224
ASRS Report	676716
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Events
Anomaly	aircraft equipment problem : critical
Independent Detector	aircraft equipment other aircraft equipment : landing gear warning other flight crewa other flight crewb
Resolutory Action	none taken : detected after the fact
Consequence	other other
Supplementary
Problem Areas	Flight Crew Human Performance Maintenance Human Performance Aircraft Chart Or Publication
Primary Problem	Aircraft

Narrative:

On touchdown at ZZZ international airport runway 12; landing gear warning light and aural sounded for approximately 5 seconds then silenced. An EICAS message only remained annunciating: gear doors. After taxi in to gate; maintenance found the left main gear door down and the forward drag link attaching shaft pulled about 1 ft out of securing collar on forward under wing area. The securing nut was found loose in the same area. They also found about a 1 inch piece of a securing bolt that holds the securing nut from backing off. The gear was pinned and the aircraft removed from service.

Original NASA ASRS Text

Title: A B767-300 ON TOUCHDOWN HAD LNDG GEAR WARNING LIGHT AND AURAL WARNING FOR 5 SECONDS ON TAXI IN TO GATE HAD EICAS GEAR DOOR WARNING. FOUND L MAIN GEAR FORWARD DRAG STRUT DISCONNECTED FROM SPINDLE ON THE GEAR SEQUENCE VALVE.

Narrative: ON TOUCHDOWN AT ZZZ INTL ARPT RWY 12; LNDG GEAR WARNING LIGHT AND AURAL SOUNDED FOR APPROX 5 SECONDS THEN SILENCED. AN EICAS MESSAGE ONLY REMAINED ANNUNCIATING: GEAR DOORS. AFTER TAXI IN TO GATE; MAINT FOUND THE L MAIN GEAR DOOR DOWN AND THE FORWARD DRAG LINK ATTACHING SHAFT PULLED ABOUT 1 FT OUT OF SECURING COLLAR ON FORWARD UNDER WING AREA. THE SECURING NUT WAS FOUND LOOSE IN THE SAME AREA. THEY ALSO FOUND ABOUT A 1 INCH PIECE OF A SECURING BOLT THAT HOLDS THE SECURING NUT FROM BACKING OFF. THE GEAR WAS PINNED AND THE ACFT REMOVED FROM SVC.

Data retrieved from NASA's ASRS site as of January 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.