Sorry, the NHTSA has not posted this TSB document yet.
You can still get the detailed info from Land Rover for this TSB. Call your local Land Rover dealer's service department & ask for a copy of TSB# LTB00996NAS1.
SITUATION: AN UNEXPECTED AND REPEATING NOISE SIMILAR TO THE MISLOCK DOUBLE 'BLEEP' MAY BE HEARD WHEN THE VEHICLE SPEED IS BELOW 3 MPH, WITH THE VEHICLE IN A CAR WASH OR IN HEAVY RAIN AND WITH THE REMOTE KEY NOT IN CLOSE PROXIMITY TO THE TAILGATE.