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Near midair collision between a commuter aircraft departing on crosswind leg and twin entering the pattern on the downwind leg.
| Attributes | |
| ACN | 310508 |
| Time | |
| Date | 199507 |
| Day | Fri |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : sby |
| State Reference | MD |
| Altitude | agl bound lower : 1000 agl bound upper : 1000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | Commercial Fixed Wing |
| Operating Under FAR Part | Part 121 |
| Flight Phase | climbout : intermediate altitude other |
| Flight Plan | IFR |
| Aircraft 2 | |
| Make Model Name | Any Unknown or Unlisted Aircraft Manufacturer |
| Operating Under FAR Part | other : unknown |
| Flight Phase | other |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 300 flight time total : 12000 flight time type : 2500 |
| ASRS Report | 310508 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : instrument pilot : commercial |
| Events | |
| Anomaly | conflict : nmac other anomaly other other spatial deviation |
| Independent Detector | other flight crewa |
| Resolutory Action | flight crew : took evasive action |
| Consequence | Other |
| Miss Distance | horizontal : 0 vertical : 75 |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
Departed runway 23 on IFR flight plan. Climbed 400 ft then turned 90 degrees left to depart left downwind. TCASII showed unknown traffic at 1 O'clock and plus 400 ft. I began to level my aircraft and look for traffic. TCASII showed plus 200 ft and descending at 1 mi. TCASII gave RA call, 'descend, descend.' I lower the nose and attempted to descend. Other aircraft (light twin) passed directly over the cockpit at about 50 ft. I heard no calls on FSS frequency 123.60 (from the other aircraft) before or after the near collision. Diagram on reverse shows flight paths and altitudes.
Original NASA ASRS Text
Title: NMAC BTWN A COMMUTER ACFT DEPARTING ON XWIND LEG AND TWIN ENTERING THE PATTERN ON THE DOWNWIND LEG.
Narrative: DEPARTED RWY 23 ON IFR FLT PLAN. CLBED 400 FT THEN TURNED 90 DEGS L TO DEPART L DOWNWIND. TCASII SHOWED UNKNOWN TFC AT 1 O'CLOCK AND PLUS 400 FT. I BEGAN TO LEVEL MY ACFT AND LOOK FOR TFC. TCASII SHOWED PLUS 200 FT AND DSNDING AT 1 MI. TCASII GAVE RA CALL, 'DSND, DSND.' I LOWER THE NOSE AND ATTEMPTED TO DSND. OTHER ACFT (LIGHT TWIN) PASSED DIRECTLY OVER THE COCKPIT AT ABOUT 50 FT. I HEARD NO CALLS ON FSS FREQ 123.60 (FROM THE OTHER ACFT) BEFORE OR AFTER THE NEAR COLLISION. DIAGRAM ON REVERSE SHOWS FLT PATHS AND ALTS.
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.