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Air carrier captain reported that a large amount of foreign substance had adhered to the main landing gear tire.
| Attributes | |
| ACN | 1535283 |
| Time | |
| Date | 201804 |
| Local Time Of Day | 1201-1800 |
| Place | |
| Locale Reference | DAL.Airport |
| State Reference | TX |
| Aircraft 1 | |
| Make Model Name | Large Transport Low Wing 2 Turbojet Eng |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Parked |
| Flight Plan | IFR |
| Component | |
| Aircraft Component | Main Gear Tire |
| Person 1 | |
| Function | Captain Pilot Not Flying |
| Qualification | Flight Crew Instrument Flight Crew Air Transport Pilot (ATP) Flight Crew Multiengine |
| Events | |
| Anomaly | Aircraft Equipment Problem Less Severe Ground Event / Encounter FOD Ground Event / Encounter Object |
Narrative:
During preflight; I saw what looked like a hat or scarf draped over the inboard tire of the left main landing gear. As I got closer; what looked like a piece of clothing was actually a one to two-inch thick; six-inch wide; and 15-inch long rubbery tar substance with gravel and rocks embedded within the material. I called maintenance. A technician; with great effort; scraped and removed the substance from the tire. He had never seen anything like it before. After giving it further thought; I suspect that this was material used to temporarily fill concrete cracks on taxiways around the construction zones on the airfield. As the temperatures are warming; I am wondering if this material adheres to aircraft tires and pulls free from the cracks or holes it is intended to fill. Whatever the cause; the potential damage caused by this material; including fairly large stones; spinning free during takeoff roll is quite high.suggestions: verify that the material used on taxiways to patch and fill holes is rated and approved for the weight of our aircraft rolling over them.
Original NASA ASRS Text
Title: Air carrier Captain reported that a large amount of foreign substance had adhered to the main landing gear tire.
Narrative: During preflight; I saw what looked like a hat or scarf draped over the inboard tire of the left main landing gear. As I got closer; what looked like a piece of clothing was actually a one to two-inch thick; six-inch wide; and 15-inch long rubbery tar substance with gravel and rocks embedded within the material. I called Maintenance. A Technician; with great effort; scraped and removed the substance from the tire. He had never seen anything like it before. After giving it further thought; I suspect that this was material used to temporarily fill concrete cracks on taxiways around the construction zones on the airfield. As the temperatures are warming; I am wondering if this material adheres to aircraft tires and pulls free from the cracks or holes it is intended to fill. Whatever the cause; the potential damage caused by this material; including fairly large stones; spinning free during takeoff roll is quite high.Suggestions: Verify that the material used on taxiways to patch and fill holes is rated and approved for the weight of our aircraft rolling over them.
Data retrieved from NASA's ASRS site 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.