A B737-300 returned to the field due to left main gear unsafe light caused by #4 flap fairing broken and interfering with the inner and middle gear doors.

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Attributes
ACN	554417
Time
Date	200207
Day	Sun
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : zzz.airport
State Reference	US
Environment
Light	Night
Aircraft 1
Controlling Facilities	tower : zzz.tower
Operator	common carrier : air carrier
Make Model Name	B737-300
Operating Under FAR Part	Part 121
Navigation In Use	other
Flight Phase	climbout : takeoff
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	other personnel other oversight : supervisor
ASRS Report	554417
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Events
Anomaly	aircraft equipment problem : critical maintenance problem : improper maintenance non adherence : far non adherence : published procedure
Independent Detector	aircraft equipment other aircraft equipment : gear position indication other flight crewa other flight crewb
Resolutory Action	flight crew : diverted to another airport other
Consequence	other other other
Factors
Maintenance	performance deficiency : installation
Supplementary
Problem Areas	Aircraft FAA Maintenance Human Performance
Primary Problem	Maintenance Human Performance

Narrative:

After gear retraction, the left main landing gear did not indicate up and locked. The aircraft landed uneventfully in ZZZ1 and maintenance found the #4 flap track fairing hanging from the forward end and the left main landing gear inner and middle door broken. Initial inspection revealed no castellated nut on the mounting stud.

Original NASA ASRS Text

Title: A B737-300 RETURNED TO THE FIELD DUE TO L MAIN GEAR UNSAFE LIGHT CAUSED BY #4 FLAP FAIRING BROKEN AND INTERFERING WITH THE INNER AND MIDDLE GEAR DOORS.

Narrative: AFTER GEAR RETRACTION, THE L MAIN LNDG GEAR DID NOT INDICATE UP AND LOCKED. THE ACFT LANDED UNEVENTFULLY IN ZZZ1 AND MAINT FOUND THE #4 FLAP TRACK FAIRING HANGING FROM THE FORWARD END AND THE L MAIN LNDG GEAR INNER AND MIDDLE DOOR BROKEN. INITIAL INSPECTION REVEALED NO CASTELLATED NUT ON THE MOUNTING STUD.

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.