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0291
What are the major indications of an incipient retreating blade stall situation, in order of occurrence?
| | A) Low-frequency vibration, pitchup of the nose, and a tendency for the aircraft to roll. |
| | B) High-frequency vibration, pitchdown of the nose, and a tendency for the aircraft to roll. |
| | C) Slow pitchup of the nose, high-frequency vibration, and a tendency for the aircraft to roll. |
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