Aircraft Flight Operation Regulations Article 87
Performance of helicopters during take-off and initial climb phase, shall meet the following requirements:1. Operations in performance Class 1. The helicopter shall be able, in the event of the failure of the critical power-unit being recognized at or before the take-off decision point (TDP), to discontinue the take-off and stop within the rejected take-off area available or, in the event of the failure of the critical power-unit being recognized at or after the take-off decision point (TDP), to continue the take-off, clearing all obstacles along the flight path by an adequate margin until the helicopter is in a position to comply with the subparagraph 1, paragraph 1 of Article 88.2. Operations in performance Class 2. The helicopter shall be able, with all power unit operating, clearing all obstacles along the flight path by an adequate margin until the helicopter is in a position to comply with the subparagraph 1, paragraph 1 of Article 88; and, in the event of the failure of the critical power-unit at any time after reaching defined point after take-off (DPATO), to continue the take-off, clearing all obstacles along the flight path by an adequate margin until the helicopter is in a position to comply with subparagraph 1, paragraph 1 of Article 88. Before the defined point after take-off (DPATO), failure of the critical power-unit may cause the helicopter to force-land; therefore, the conditions stated in Article 85 shall apply.3.Operations in performance Class 3. The helicopter shall be able, with all power units operating, clearing all obstacles along the flight path by an adequate margin until the helicopter is in a position to comply with subparagraph 2, paragraph 1 of Article 88. When at any point of the flight path, failure of a power-unit will cause the helicopter to force-land, the conditions stated in Article 85 shall apply.
中文原文 航空器飛航作業管理規則第87條
直昇機於起飛及爬升初期之性能應符合下列規定：
一、一級性能直昇機：於到達起飛決定點或到達該點之前發生關鍵動力機件失效，而中止起飛時，應能於放棄起飛區域內降落；如於起飛決定點或到達該點之後發生失效時，應能繼續起飛、爬升及以安全高度超越航路上所有障礙，直至直昇機到達第八十八條第一項第一款規定之位置。
二、二級性能直昇機：於動力機件正常運作情況下，應能以安全高度超越航路上所有障礙，直至直昇機到達第八十八條第一項第一款規定之位置；如於到達起飛臨界點之後發生關鍵動力機件失效時，應能繼續起飛、爬升及以安全高度超越航路上所有障礙，直至直昇機到達第八十八條第一項第一款規定之位置。
但於到達起飛臨界點前發生關鍵動力機件失效需迫降時，應符合第八十五條之規定。
三、三級性能直昇機：於動力機件正常運作情況下，應能以安全高度超越航路上所有障礙，直至直昇機到達第八十八條第一項第二款規定之位置。
但於航路上發生動力機件失效需迫降時，應符合第八十五條之規定。
一、一級性能直昇機：於到達起飛決定點或到達該點之前發生關鍵動力機件失效，而中止起飛時，應能於放棄起飛區域內降落；如於起飛決定點或到達該點之後發生失效時，應能繼續起飛、爬升及以安全高度超越航路上所有障礙，直至直昇機到達第八十八條第一項第一款規定之位置。
二、二級性能直昇機：於動力機件正常運作情況下，應能以安全高度超越航路上所有障礙，直至直昇機到達第八十八條第一項第一款規定之位置；如於到達起飛臨界點之後發生關鍵動力機件失效時，應能繼續起飛、爬升及以安全高度超越航路上所有障礙，直至直昇機到達第八十八條第一項第一款規定之位置。
但於到達起飛臨界點前發生關鍵動力機件失效需迫降時，應符合第八十五條之規定。
三、三級性能直昇機：於動力機件正常運作情況下，應能以安全高度超越航路上所有障礙，直至直昇機到達第八十八條第一項第二款規定之位置。
但於航路上發生動力機件失效需迫降時，應符合第八十五條之規定。