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A high-wing single engine; after landing runway 31L at rhv; was cleared to back-taxi to the approach end and simultaneously cleared for takeoff (runway 31L has no accessible parallel taxiway; thus the routine use of back taxi clearances practicing full stop landings). After completing the back taxi the high-wing single engine began its takeoff roll simultaneously with a small twin on runway 31R. When both were airborne their horizontal separation was only about 300 ft; the centerline spacing between the two runways.
| Attributes | |
| ACN | 1157703 |
| Time | |
| Date | 201403 |
| Local Time Of Day | 1801-2400 |
| Place | |
| Locale Reference | RHV.Airport |
| State Reference | CA |
| Aircraft 1 | |
| Make Model Name | Small Aircraft High Wing 1 Eng Fixed Gear |
| Operating Under FAR Part | Part 91 |
| Flight Phase | Initial Climb |
| Route In Use | None |
| Flight Plan | VFR |
| Aircraft 2 | |
| Make Model Name | Small Aircraft Low Wing 2 Eng Retractable Gear |
| Operating Under FAR Part | Part 91 |
| Flight Phase | Descent |
| Route In Use | None |
| Flight Plan | VFR |
| Person 1 | |
| Function | Local |
| Qualification | Air Traffic Control Fully Certified |
| Events | |
| Anomaly | ATC Issue All Types Conflict NMAC |
| Miss Distance | Horizontal 300 Vertical 0 |
Narrative:
A high-wing single engine landed on runway 31L and was told to make a 180 back-taxi Runway31L cleared for takeoff. A small twin a minute later was given a takeoff clearance on runway 31R. The high-wing single engine started takeoff roll before the small twin. The high-wing single engine rotated just before the small twin; the small twin passed the high-wing single engine when both were less than 10 ft off the ground. The distance between the runways is 300 ft. Do not give a 180 back-taxi and takeoff clearance at the same time. The local controller did not think twice about this operation since it is a common practice here.
Original NASA ASRS Text
Title: A high-wing single engine; after landing Runway 31L at RHV; was cleared to back-taxi to the approach end and simultaneously cleared for takeoff (Runway 31L has no accessible parallel taxiway; thus the routine use of back taxi clearances practicing full stop landings). After completing the back taxi the high-wing single engine began its takeoff roll simultaneously with a small twin on Runway 31R. When both were airborne their horizontal separation was only about 300 FT; the centerline spacing between the two runways.
Narrative: A high-wing single engine landed on Runway 31L and was told to make a 180 back-taxi Runway31L cleared for takeoff. A small twin a minute later was given a takeoff clearance on Runway 31R. The high-wing single engine started takeoff roll before the small twin. The high-wing single engine rotated just before the small twin; the small twin passed the high-wing single engine when both were less than 10 FT off the ground. The distance between the runways is 300 FT. Do not give a 180 back-taxi and takeoff clearance at the same time. The Local Controller did not think twice about this operation since it is a common practice here.
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.