| 1. | Its boundaries are from surface to flight level ( FL ) 660.
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| 2. | When cruising at higher altitudes aircraft adopt flight levels ( FLs ).
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| 3. | :See Flight level and Reduced Vertical Separation Minima for information on vertical separation.
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| 4. | If the pilot had respected flight levels the accident would not have happened.
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| 5. | If the pilot had respected flight levels the accident would not have happened,
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| 6. | A change in airway may require a change in flight level.
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| 7. | On a bi-directional airway, each direction has its own set of flight levels.
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| 8. | Instead, the lowest usable "'flight level'" is the transition level plus 500 ft.
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| 9. | The aircraft's high rate of climb enables it to pass congested flight levels quickly.
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| 10. | In fact, knee extensor strength increased over the pre-flight level ( figure 6-13 ).
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