Narrative:

Under center control; l [was] executing the RNAV (GPS) runway 27; descending from 10;000 feet [and]; told to fly directly to the IAF and descend to 4;000 feet. Some distance from [the] IAF (guessing about 35nm) told to fly directly to the if; descend to 1;500 feet and cleared RNAV 27 approach. Just about 2;000 in our descent the GPWS voice activation of obstacle; obstacle climb; climb voice and climb directions began. The pilot flying immediately executed a rapid climb and I told ATC that we received the warning and were climbing. At about 4;000 feet warnings stopped and we leveled off. Told ATC warning stopped and he reissued descend to 1500 feet; cleared approach; which we did and completed approach with no further issues.after a long day and being late; all my altitudes/distances stated should be close to what I recalled and pretty close to the actual numbers. After landing and pulling up our flight/track; when the controller cleared us from flying directly to the IAF to now flying directly to the if; we are guessing that we entered or were very close to entering a restricted area. We had talked about the restricted area before and during our flight but when under the control of ATC and cleared to go from directly first to IAF for the approach and then directly to the if with descent and approach clearance I assumed (a very bad word) that we would be clear of restricted area. Our primary flight displays were displaying our approach plates and multi-functional display (mfd) the airport and pink navigation line directly to the IAF and then the if and the runway extension. My only suggestion would be to have inquired of the controller if we were clear of retracted area and also have the mfd out to a further range to display the restricted area until close to the final approach fix.

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Original NASA ASRS Text

Title: EMB 505 Captain reported that during initial approach; they received a GPWS VOICE ACTIVATION of Obstacle; they initiated a climb and informed ATC.

Narrative: Under center control; l [was] executing the RNAV (GPS) Runway 27; descending from 10;000 feet [and]; told to fly directly to the IAF and descend to 4;000 feet. Some distance from [the] IAF (guessing about 35nm) told to fly directly to the IF; descend to 1;500 feet and cleared RNAV 27 approach. Just about 2;000 in our descent the GPWS VOICE ACTIVATION of Obstacle; Obstacle Climb; Climb voice and climb directions began. The pilot flying immediately executed a rapid climb and I told ATC that we received the warning and were climbing. At about 4;000 feet warnings stopped and we leveled off. Told ATC warning stopped and he reissued descend to 1500 feet; cleared approach; which we did and completed approach with no further issues.After a long day and being late; all my altitudes/distances stated should be close to what I recalled and pretty close to the actual numbers. After landing and pulling up our flight/track; when the controller cleared us from flying directly to the IAF to now flying directly to the IF; we are guessing that we entered or were very close to entering a Restricted Area. We had talked about the restricted area before and during our flight but when under the control of ATC and cleared to go from directly first to IAF for the approach and then directly to the IF with descent and approach clearance I assumed (a very bad word) that we would be clear of restricted area. Our Primary Flight Displays were displaying our approach plates and Multi-Functional Display (MFD) the airport and pink Navigation line directly to the IAF and then the IF and the runway extension. My only suggestion would be to have inquired of the controller if we were clear of Retracted Area and also have the MFD out to a further range to display the restricted area until close to the final approach fix.

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.