[基础资料] 飞机轮速超限情况的处理

Exceeding Tire Speed Rating During Takeoff
Airplane tires are designed to withstand a wide range of operating conditions, including carrying very high loads and operating at very high speeds. It is common for a jet airplane tire to carry loads as heavy as 60,000 pounds while operating at ground speeds up to 235 miles per hour. To accommodate these operational conditions, each tire has specific load and speed ratings. Tires are carefully designed and tested to withstand operation up to, but not necessarily beyond, these ratings.

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Although it is uncommon to exceed the load rating of tires during normal airline operation,
Boeing is receiving an increasing number of operator inquiries about tire speed limits being exceeded during takeoff.
There is no industry consensus on the maintenance actions that should be taken following tire-speed-limit exceedance during takeoff. At this time, operators, in conjunction with their regulatory agency,must determine the most appropriate maintenance action based on the tirespeed-limit exceedance event.
The best approach is to try to avoid overspeed takeoffs altogether. By taking the following steps, flight operations personnel can reduce the possibility of tirespeed-limit exceedance during takeoff:
Follow the Boeing-recommended rotation procedure.
When dispatching at or near the tirespeed-limit weight in a crosswind situation, consider conservatively,accounting for the tailwind component.
When dispatching at or near the tire speed limit in gusty wind and strong crosswind conditions, use a higher thrust setting than the minimum required.
For more information, contact Boeing Flight Operations Engineering at flightops.