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Check the air pressure regulator, if there is any loosen.
检查空气油量（气量）调节阀等相关部件有无异常，是否松动。
youdao
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Replaced R engine bleed air regulator, running-up test OK, pressure same.
更换右发引气调节器，试车正常，左右压力一致。
youdao
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Replaced R engine bleed air regulator, running-up test OK, pressure same.
更换右发引气调节器，试车正常，左右压力一致。
youdao