What happens if the ADS3 SLIPCOMP FAIL EICAS is displayed?

If the ADS3 SLIPCOMP FAIL EICAS message is displayed, it indicates a failure in the Air Data System, particularly related to the slip compensation function of the third air data source. This message is critical due to the implications it has on RVSM (Reduced Vertical Separation Minimum) operations.

The correct response highlights that RVSM operations are not permitted when this message is shown. RVSM requires two operational and reliable altitude-measuring systems, and a failure in one of the air data systems compromises the aircraft's ability to maintain required altitude accuracy necessary for RVSM. Without proper altitude measurement and reliability, maintaining safe vertical separation between aircraft is jeopardized, hence RVSM certification standards cannot be met.

This situation demands that operators take appropriate action, typically including re-evaluating the flight route to ensure safety and compliance with aviation regulations. The limitations imposed by such an EICAS message underscore the importance of each air data source in ensuring the aircraft operates within certified performance parameters.