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You are here: home->flt_eng->D11->1.1.0.3.7.A.1
1037
One of the operational requirements of airplanes operating under CFR part 121 operating rules requiring a 3rd artificial horizon indicating system is it must
| | A) be operational without selection after failure of the electrical generating system. |
| | B) be powered from the main electrical generating system. |
| | C) operate in conjunction with one of the other attitude indicating systems. |
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