<< >> NASA ASRS Report 625394, July 2004

B737 crew had a light indicating a main landing gear extension problem, after a tire failure on takeoff.

Attributes
ACN	625394
Time
Date	200407
Day	Wed
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : ont.airport
State Reference	CA
Altitude	agl single value : 1800
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tower : ont.tower
Operator	common carrier : air carrier
Make Model Name	B737 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Navigation In Use	other
Flight Phase	descent : approach
Route In Use	approach : visual
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : multi engine pilot : instrument pilot : atp pilot : cfi pilot : commercial pilot : flight engineer
Experience	flight time last 90 days : 210 flight time total : 15000 flight time type : 6000
ASRS Report	625394
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Events
Anomaly	aircraft equipment problem : critical
Independent Detector	aircraft equipment other aircraft equipment : lt main gear indication, hyd quant lights, a system pressure. other flight crewa other flight crewb
Resolutory Action	controller : issued new clearance flight crew : executed go around
Consequence	other other
Supplementary
Problem Areas	Aircraft
Primary Problem	Aircraft

Narrative:

On final to runway 26L at ont, 1800 ft AGL, attempted to lower landing gear. A loud thump was heard and the left main gear did not indicate down and locked. No green down indication and a red disagreement light was displayed. Indicator lights were checked and found to be functioning. A VFR go around was initiated in VMC. The QRH manual ear extension checklist was followed and a successful manual extension of the left main gear was accomplished. A VFR pattern to runway 26R was flown to a landing. After landing and while taxiing, the 'a' system hydraulics failed. The aircraft was stopped on the taxiway and towed to the gate. At the gate I found the left inboard main tire had blown and debris had ruptured a hydraulic line. Damage to the flap was also found. All checklists were followed. The tire most likely failed on takeoff at ZZZ. Takeoff was smooth with no indications of problems.

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Original NASA ASRS Text

Title: B737 CREW HAD A LIGHT INDICATING A MAIN LNDG GEAR EXTENSION PROB, AFTER A TIRE FAILURE ON TKOF.

Narrative: ON FINAL TO RWY 26L AT ONT, 1800 FT AGL, ATTEMPTED TO LOWER LNDG GEAR. A LOUD THUMP WAS HEARD AND THE L MAIN GEAR DID NOT INDICATE DOWN AND LOCKED. NO GREEN DOWN INDICATION AND A RED DISAGREEMENT LIGHT WAS DISPLAYED. INDICATOR LIGHTS WERE CHKED AND FOUND TO BE FUNCTIONING. A VFR GAR WAS INITIATED IN VMC. THE QRH MANUAL EAR EXTENSION CHKLIST WAS FOLLOWED AND A SUCCESSFUL MANUAL EXTENSION OF THE L MAIN GEAR WAS ACCOMPLISHED. A VFR PATTERN TO RWY 26R WAS FLOWN TO A LNDG. AFTER LNDG AND WHILE TAXIING, THE 'A' SYS HYDS FAILED. THE ACFT WAS STOPPED ON THE TXWY AND TOWED TO THE GATE. AT THE GATE I FOUND THE L INBOARD MAIN TIRE HAD BLOWN AND DEBRIS HAD RUPTURED A HYD LINE. DAMAGE TO THE FLAP WAS ALSO FOUND. ALL CHKLISTS WERE FOLLOWED. THE TIRE MOST LIKELY FAILED ON TKOF AT ZZZ. TKOF WAS SMOOTH WITH NO INDICATIONS OF PROBS.

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.