Narrative:

Taxied from ramp to approach end of runway 23 at sby, while monitoring sby FSS on 123.6. We were #2 for departure behind a light, military, twin turboprop. Switched to patuxent approach (on 127.95) awaiting IFR release. Once released by patuxent approach, returned to sby FSS on 123.6. I made a radio call: 'air carrier taking runway 23 at sby for departure.' sby FSS did not comment on any other aircraft in the traffic pattern. Completed runway checklist. No targets on the TCASII when we took the runway. Normal takeoff, I announced 'out of 400 ft and flap retract speed.' captain called for flaps up and commenced a left turn. I made another radio call: 'air carrier off runway 23 at sby departing the pattern with a left turn out.' passing 600 ft AGL, the TCASII gave a TA showing a target at our 1-2 O'clock position, level 400 ft above us. The captain and I both looked for the aircraft. Passing 800 ft AGL, the TCASII gave an RA with the target now at 12-1 O'clock, level 200 ft above us. The RA called for a descent. The captain descended about the same time we saw the target, which was a gray, light twin-engine aircraft. The last display I recall on the TCASII showed the target 100 ft above us, and descending. During this close encounter, the target aircraft maintained a straight track, which appeared to be a left downwind for runway 23 at sby. The target aircraft did not take any evasive action to avoid a potential collision. No radio xmissions were heard on 123.6. Once we were clear of the target aircraft, the captain recommenced the climb. The remainder of the flight was uneventful.

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Original NASA ASRS Text

Title: NMAC.

Narrative: TAXIED FROM RAMP TO APCH END OF RWY 23 AT SBY, WHILE MONITORING SBY FSS ON 123.6. WE WERE #2 FOR DEP BEHIND A LIGHT, MIL, TWIN TURBOPROP. SWITCHED TO PATUXENT APCH (ON 127.95) AWAITING IFR RELEASE. ONCE RELEASED BY PATUXENT APCH, RETURNED TO SBY FSS ON 123.6. I MADE A RADIO CALL: 'ACR TAKING RWY 23 AT SBY FOR DEP.' SBY FSS DID NOT COMMENT ON ANY OTHER ACFT IN THE TFC PATTERN. COMPLETED RWY CHKLIST. NO TARGETS ON THE TCASII WHEN WE TOOK THE RWY. NORMAL TKOF, I ANNOUNCED 'OUT OF 400 FT AND FLAP RETRACT SPD.' CAPT CALLED FOR FLAPS UP AND COMMENCED A L TURN. I MADE ANOTHER RADIO CALL: 'ACR OFF RWY 23 AT SBY DEPARTING THE PATTERN WITH A L TURN OUT.' PASSING 600 FT AGL, THE TCASII GAVE A TA SHOWING A TARGET AT OUR 1-2 O'CLOCK POS, LEVEL 400 FT ABOVE US. THE CAPT AND I BOTH LOOKED FOR THE ACFT. PASSING 800 FT AGL, THE TCASII GAVE AN RA WITH THE TARGET NOW AT 12-1 O'CLOCK, LEVEL 200 FT ABOVE US. THE RA CALLED FOR A DSCNT. THE CAPT DSNDED ABOUT THE SAME TIME WE SAW THE TARGET, WHICH WAS A GRAY, LIGHT TWIN-ENG ACFT. THE LAST DISPLAY I RECALL ON THE TCASII SHOWED THE TARGET 100 FT ABOVE US, AND DSNDING. DURING THIS CLOSE ENCOUNTER, THE TARGET ACFT MAINTAINED A STRAIGHT TRACK, WHICH APPEARED TO BE A L DOWNWIND FOR RWY 23 AT SBY. THE TARGET ACFT DID NOT TAKE ANY EVASIVE ACTION TO AVOID A POTENTIAL COLLISION. NO RADIO XMISSIONS WERE HEARD ON 123.6. ONCE WE WERE CLR OF THE TARGET ACFT, THE CAPT RECOMMENCED THE CLB. THE REMAINDER OF THE FLT WAS UNEVENTFUL.

Data retrieved from NASA's ASRS site as of July 2007 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.