Narrative:

I was flying an approach into crw with a coupled autoplt and flight director. On ILS approach for runway 23; outside meeky; approach control advised us runway 23 RVR at 2000 ft. We required 2400 ft to continue; so we asked to hold until RVR came up. Approach control instructed us to hold over meeky. We set up the hold; verified it; and executed it promptly. I noticed the aircraft was descending; at the same time we received a terrain warning from the GPWS. I proceeded to fly the recovery procedure back to holding pattern altitude. We reported the warning and climb to approach control; who in turn advised us of our altitude deviation. We re-entered the hold and stayed there until RVR allowed us to shoot the approach and land. Callback conversation with reporter revealed the following information: the reporter stated that the aircraft had entered the approach mode and was tracking the ILS GS and course when the approach was abandoned because of WX minimums. After the approach was discontinued and while the FMS being programmed for the holding; the aircraft transitioned from GS track to a pitch mode. The reporter is not sure which pitch mode was reverted to; but when the egpws annunciated; the descent was stopped.

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Original NASA ASRS Text

Title: A CL65 ENTERING HOLDING EXPERIENCED AN EGPWS WARNING AFTER THE AUTOPLT ENTERED A PITCH MODE FOLLOWING A DISCONTINUED ILS APCH TO CRW RWY 23.

Narrative: I WAS FLYING AN APCH INTO CRW WITH A COUPLED AUTOPLT AND FLT DIRECTOR. ON ILS APCH FOR RWY 23; OUTSIDE MEEKY; APCH CTL ADVISED US RWY 23 RVR AT 2000 FT. WE REQUIRED 2400 FT TO CONTINUE; SO WE ASKED TO HOLD UNTIL RVR CAME UP. APCH CTL INSTRUCTED US TO HOLD OVER MEEKY. WE SET UP THE HOLD; VERIFIED IT; AND EXECUTED IT PROMPTLY. I NOTICED THE ACFT WAS DSNDING; AT THE SAME TIME WE RECEIVED A TERRAIN WARNING FROM THE GPWS. I PROCEEDED TO FLY THE RECOVERY PROC BACK TO HOLDING PATTERN ALT. WE RPTED THE WARNING AND CLB TO APCH CTL; WHO IN TURN ADVISED US OF OUR ALTDEV. WE RE-ENTERED THE HOLD AND STAYED THERE UNTIL RVR ALLOWED US TO SHOOT THE APCH AND LAND. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: THE RPTR STATED THAT THE ACFT HAD ENTERED THE APCH MODE AND WAS TRACKING THE ILS GS AND COURSE WHEN THE APCH WAS ABANDONED BECAUSE OF WX MINIMUMS. AFTER THE APCH WAS DISCONTINUED AND WHILE THE FMS BEING PROGRAMMED FOR THE HOLDING; THE ACFT TRANSITIONED FROM GS TRACK TO A PITCH MODE. THE RPTR IS NOT SURE WHICH PITCH MODE WAS REVERTED TO; BUT WHEN THE EGPWS ANNUNCIATED; THE DSCNT WAS STOPPED.

Data retrieved from NASA's ASRS site as of January 2009 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.