Flight crew reported receiving a terrain warning while above a waypoint on the approach due to the close proximity of towers.
Synopsis
Flight crew reported receiving a terrain warning while above a waypoint on the approach due to the close proximity of towers.
Narrative
I was the pilot flying the RNAV (GPS) 31 to RDG. The autopilot was on and providing inputs to the flight controls. We received an Obstacle Alert Caution and then immediately thereafter an Obstacle Warning for the Tower depicted at ADEKY on the approach. We had no deviation; laterally; horizontally; or velocity for the approach. We executed the escape maneuver in accordance with the AOM. This Tower is in the flight path of the approach. The approach is not safe and is unflyable without receiving an Obstacle Caution and Warning. Yes; this write-up is exactly like the one I submitted for the event on [another day]. The first event was not a fluke. I am convinced if you fly this approach as it is published this will be the result each and every time.Cease utilizing this approach to Runway 31. It is unsafe and use of it will result in an Obstacle Caution and Warning. This approach in its current configuration and parameters will result in an Obstacle Warning; the approach needs to be a RNP approach similar to the one in DCA to Runway 19 or it needs to be an offset approach like the one to 16R in DEN.
Second reporter narrative
RNAV 31 into RDG. Pilot flying is Captain; autopilot and LNAV/VNAV engaged. Fully configured and stable 1.5 NM from FAF; knowing about obstacles on short final. Still received GPWS warning over ADEKY. Executed escape maneuver. This approach is impossible to be stable without receiving GPWS Warning due to towers over ADEKY.
Source: NASA Aviation Safety Reporting System (public domain). Reports are voluntary submissions and are not verified by NASA.