<< >> NASA ASRS Report 190102, September 1991

During taxi flight crew suspected they might have hit a taxiway light, had tires inspected, returned to gate, changed 1 flat damaged tire.

Attributes
ACN	190102
Time
Date	199109
Day	Mon
Local Time Of Day	0001 To 0600
Place
Locale Reference	airport : gum
State Reference	GU
Altitude	agl bound lower : 0 agl bound upper : 0
Environment
Flight Conditions	Mixed
Light	Night
Aircraft 1
Controlling Facilities	tower : mfr
Operator	common carrier : air carrier
Make Model Name	Widebody, Low Wing, 4 Turbojet Eng
Navigation In Use	Other
Flight Phase	ground other : taxi
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp pilot : instrument pilot : commercial
ASRS Report	190102
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : atp pilot : commercial
Experience	flight time last 90 days : 30 flight time total : 8000 flight time type : 2000
ASRS Report	190101
Events
Anomaly	aircraft equipment problem : less severe other anomaly other
Independent Detector	other flight crewa
Resolutory Action	other
Consequence	Other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation other
Situations
Airport	other physical facility

Narrative:

During taxi out for takeoff we may have run over a taxiway light or the base of a light which had been run over earlier. We found no evidence of a broken light but we did puncture a tire. We had it replaced before takeoff. We were off the taxiway centerline because of the following reasons: this taxiway is not designed for widebody transport use. There was a wing tip clearance concern on the left causing us to move right. Taxi lights are non standard and poorly located. Many are missing due to having been run over previously. The ones remaining can easily be mistaken for centerline lights due to their location(on the right side of taxiway only). It was night, with rain and we were tired due to an all night operation. This happened at early am local after starting duty the previous evening. The painted centerline markings were almost impossible to see. The lights were located way in from the edge of taxiway.

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Original NASA ASRS Text

Title: DURING TAXI FLC SUSPECTED THEY MIGHT HAVE HIT A TAXIWAY LIGHT, HAD TIRES INSPECTED, RETURNED TO GATE, CHANGED 1 FLAT DAMAGED TIRE.

Narrative: DURING TAXI OUT FOR TKOF WE MAY HAVE RUN OVER A TAXIWAY LIGHT OR THE BASE OF A LIGHT WHICH HAD BEEN RUN OVER EARLIER. WE FOUND NO EVIDENCE OF A BROKEN LIGHT BUT WE DID PUNCTURE A TIRE. WE HAD IT REPLACED BEFORE TKOF. WE WERE OFF THE TAXIWAY CENTERLINE BECAUSE OF THE FOLLOWING REASONS: THIS TAXIWAY IS NOT DESIGNED FOR WDB USE. THERE WAS A WING TIP CLRNC CONCERN ON THE L CAUSING US TO MOVE R. TAXI LIGHTS ARE NON STANDARD AND POORLY LOCATED. MANY ARE MISSING DUE TO HAVING BEEN RUN OVER PREVIOUSLY. THE ONES REMAINING CAN EASILY BE MISTAKEN FOR CENTERLINE LIGHTS DUE TO THEIR LOCATION(ON THE R SIDE OF TAXIWAY ONLY). IT WAS NIGHT, WITH RAIN AND WE WERE TIRED DUE TO AN ALL NIGHT OP. THIS HAPPENED AT EARLY AM LCL AFTER STARTING DUTY THE PREVIOUS EVENING. THE PAINTED CENTERLINE MARKINGS WERE ALMOST IMPOSSIBLE TO SEE. THE LIGHTS WERE LOCATED WAY IN FROM THE EDGE OF TAXIWAY.

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.