EMI from cabin
Link to B737-800 NASA incident Sep 05 provides excellent evidence of a laptop wireless connection causing false RAs on the TCAS.
We are all aware of the requirement to turn off electronic equipment in the cabin for take-off and landing, but not in the cruise. Do we therefore regard the chance of a false RA in the cruise as acceptable, or was this a one-off incident caused by a fault in the TCAS sensitivity or shielding?