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Guest britair

B757 hydraulic panel

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Hi All when running the hydraulics on the ground using the APU the centre system pumps are sequenced ie only 1 pump allowed to run if you try to switch on both pumps the rt pump shows on but the lp amber light stays on; if you then switch off the lh centre pump the rt pump starts and the press lt goes out this is done to keep the apu generator load down to a reasonable level.(this is only with the engine generators off line) regards Brian

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