Narrative:

While on an RNAV approach to runway 6; we descended to the MDA after the final approach fix and shortly after arriving at MDA; we received a GPWS warning and a call from tower indicating a low situation. A go-around was initiated and landing made with same approach with no problems. The second in command and I discussed the situation after landing and decided the descent to MDA from the FAF was too fast during the first approach. During the first approach; I descended at 1500 FPM to arrive at the MDA with plenty of time to stabilize and locate the runway. The weather indicated approx 60 feet of leeway from bases to MDA. We were stabilized at MDA when the GPWS activated. The second approach was made the same way; however; the descent was made at 1000 FPM. We stabilized at the MDA; located the runway and landed. In subsequent discussion; we decided the first approach 'scared' the GPWS and activated the warning based on our descent rate. The descent rate I first used (1500 FPM) was used due to training received at a commercial training facility. We generally train to get down to MDA asap to afford the opportunity to find the runway; stabilize and complete the landing. Perhaps the descent should be practiced at a lesser rate. The approach plate for the RNAV runway 6 approach at mvy; suggests an 800 FPM slope. I was nearly twice that and I believe that's what caused the GPWS warning. I will be more tuned in the the recommended descent rate and modify if necessary; rather than simply default to the training company's method.

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Original NASA ASRS Text

Title: HS125-800 Captain experiences GPWS terrain warning and a call from tower indicating a low situation during RNAV Runway 6 approach to MVY. Descent to MDA was initiated at FAF using 1500 FPM.

Narrative: While on an RNAV approach to Runway 6; we descended to the MDA after the final approach fix and shortly after arriving at MDA; we received a GPWS warning and a call from Tower indicating a low situation. A go-around was initiated and landing made with same approach with no problems. The Second In Command and I discussed the situation after landing and decided the descent to MDA from the FAF was too fast during the first approach. During the first approach; I descended at 1500 FPM to arrive at the MDA with plenty of time to stabilize and locate the runway. The weather indicated approx 60 feet of leeway from bases to MDA. We were stabilized at MDA when the GPWS activated. The second approach was made the same way; however; the descent was made at 1000 FPM. We stabilized at the MDA; located the runway and landed. In subsequent discussion; we decided the first approach 'scared' the GPWS and activated the warning based on our descent rate. The descent rate I first used (1500 FPM) was used due to training received at a commercial training facility. We generally train to get down to MDA asap to afford the opportunity to find the runway; stabilize and complete the landing. Perhaps the descent should be practiced at a lesser rate. The approach plate for the RNAV Runway 6 approach at MVY; suggests an 800 FPM slope. I was nearly twice that and I believe that's what caused the GPWS warning. I will be more tuned in the the recommended descent rate and modify if necessary; rather than simply default to the training company's method.

Data retrieved from NASA's ASRS site as of April 2012 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.