ASRS 2099658

ACN 2099658 · 2024-03 · Any Unknown or Unlisted Aircraft Manufacturer

Flight crew reported receiving a terrain warning on the RDG RNAV (GPS) Runway 31 approach for nearby towers even though they flew the approach accurately.

Controlled Flight Toward Terrain Initial Approach

Pilot narratives

Verbatim, de-identified by NASA. Placeholders: ZZZ, X, Y.

Reporter 1

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. 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. Immediately cease using this approach. It is unsafe and results in an Obstacle Caution and Warning. The approach in its current configuration is not safe and needs to be decommissioned. This runway needs an offset or RNP approach that would be similar to the approach into DCA Runway 19.

Reporter 2

RNAV 31 into RDG. Pilot flying is Person A, autopilot and LNAV/VNAV engaged. Fully configured and stabilized 1.5 miles 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 on short final.

NASA classification · Anomalies

Inflight Event / Encounter

NASA classification · Assessments

Contributing Factors / Situations: Airspace Structure · ATC Equipment / Nav Facility / Buildings · Software and Automation · Procedure · Chart Or Publication
Primary Problem: ATC Equipment / Nav Facility / Buildings

ASRS reports are voluntary, de-identified by NASA, and represent the reporter's perspective; they are not investigated and cannot be used to infer prevalence. Authoritative source: asrs.arc.nasa.gov ↗