Air carrier flight crew reported executing a go-around after receiving an egpws obstacle warning on ...

Attributes
ACN	1387670
Time
Date	201609
Local Time Of Day	0001-0600
Place
Locale Reference	ILM.Airport
State Reference	NC
Environment
Flight Conditions	Marginal
Light	Daylight
Aircraft 1
Make Model Name	Regional Jet CL65 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	Final Approach
Route In Use	Other RNAV (GPS) RWY 6
Flight Plan	IFR
Person 1
Function	Captain Pilot Not Flying
Qualification	Flight Crew Air Transport Pilot (ATP)
Person 2
Function	Pilot Flying First Officer
Qualification	Flight Crew Air Transport Pilot (ATP)
Events
Anomaly	Deviation - Procedural Published Material / Policy Inflight Event / Encounter CFTT / CFIT

Narrative:

During descent via the RNAV 6 approach prior to MDA we received egpws 'caution obstacle' followed by 'obstacle obstacle' and 'pull up pull up' warning. We were VMC at that moment with rain showers obscuring the field. No visual obstacles were noted; missed approach/go around procedures were implemented. Flight attendants were notified and we were re-vectored to ILS 6 for a normal approach and landing. Upon further review of the charts; we noted that on the RNAV 6 the highest obstacle on the approach path is 250 feet with the MDA of 500 feet while on the identical approach path for the ILS Y localizer/DME has a 450 foot obstacle and an additional stepdown fix zipvo of 580 feet prior to the final MDA of 420 feet.if the 450 foot tower is actually there then it should be charted on all the charts; and if so the intermediate stepdown fix zipvo of 580 feet should be there for other non-precision approaches. If the tower isn't there; there may [be] an error in the egpws database.

Original NASA ASRS Text

Title: Air carrier flight crew reported executing a go-around after receiving an EGPWS obstacle warning on the RNAV 6 approach to ILM. Reporter stated the obstacle is not charted on the RNAV 6 approach.

Narrative: During descent via the RNAV 6 approach prior to MDA we received EGPWS 'caution obstacle' followed by 'obstacle obstacle' and 'pull up pull up' warning. We were VMC at that moment with rain showers obscuring the field. No visual obstacles were noted; missed approach/go around procedures were implemented. Flight attendants were notified and we were re-vectored to ILS 6 for a normal approach and landing. Upon further review of the charts; we noted that on the RNAV 6 the highest obstacle on the approach path is 250 feet with the MDA of 500 feet while on the identical approach path for the ILS Y LOC/DME has a 450 foot obstacle and an additional stepdown fix ZIPVO of 580 feet prior to the final MDA of 420 feet.If the 450 foot tower is actually there then it should be charted on all the charts; and if so the intermediate stepdown fix ZIPVO of 580 feet should be there for other non-precision approaches. If the tower isn't there; there may [be] an error in the EGPWS database.

Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.

Air carrier flight crew reported executing a go-around after receiving an egpws obstacle warning on the RNAV 6 approach to ilm. Reporter stated the obstacle is not charted on the RNAV 6 approach.