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6d ago

120kts IAS RTO You have a 30kts HW and this will make your GS 90kts. Is the air / ground sensor based on 1. ground speed 2. IAS



Hi Vernon, The Anti-skid/Autobrake Control Unit (AACU) arms RTO braking when all wheels speed average more than 90 kt as per FCOM (88 kt according to AMM).


Air/Ground sensor does not sense any speed, air/ground sensor either senses air or ground.


-Petr

So its based on ground speed and not IAS?


So, if you have a HW of 20kts at 90KTS that will make your ground speed 70kts and your autobr won’t initiate

But what if you loose IRS and you have no GS available

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