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The accumulator uses its stored air pressure to give emergency brake pressure in the event of loss of hydraulic system A and B pressure. It can provide six full brake applications - even if all hydraulic power is lost. If you should get into that situation just apply the brakes and hold them on, don’t cycle or pump the brakes because you only get six applications. The accumulators also dampen pressure surges and assure instantaneous flow of fluid to the brakes regardless of other hydraulic demands. There are two brake accumulators on the -1/200, one for inboard brakes & one for outboard brakes and just one on all later series. |
All of the information, photographs & schematics from this website and much more is now available in a 370 page, 8.5" x 11" book available here. Updated 23 May 10 |
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Accumulator servicing point - 737 Found on the rear wall of the wheel well on the stbd side, the pressure gauge measures air from the air side of the accumulator and should read approximately 3000psi. Note the accumulator is hidden on the NG's.
Accumulator servicing point - 737NG |
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