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Cos local controller experienced operational error as departure aircraft overflew aircraft at downfield runway intersection.
| Attributes | |
| ACN | 626523 |
| Time | |
| Date | 200408 |
| Day | Wed |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : cos.airport |
| State Reference | CO |
| Altitude | agl bound lower : 0 agl bound upper : 50 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tower : cos.tower |
| Operator | general aviation : personal |
| Make Model Name | Skyhawk 172/Cutlass 172 |
| Operating Under FAR Part | Part 91 |
| Flight Phase | climbout : takeoff |
| Flight Plan | None |
| Aircraft 2 | |
| Controlling Facilities | tower : cos.tower |
| Operator | general aviation : personal |
| Make Model Name | Skyhawk 172/Cutlass 172 |
| Operating Under FAR Part | Part 91 |
| Flight Phase | ground : taxi |
| Flight Plan | VFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : local |
| Qualification | controller : radar |
| Experience | controller radar : 18 flight time total : 210 |
| ASRS Report | 626523 |
| Person 2 | |
| Affiliation | other |
| Function | flight crew : single pilot |
| Events | |
| Anomaly | conflict : ground critical non adherence : required legal separation |
| Independent Detector | other controllera other flight crewa |
| Resolutory Action | none taken : insufficient time |
| Consequence | faa : investigated |
| Miss Distance | horizontal : 20 vertical : 50 |
| Supplementary | |
| Problem Areas | ATC Human Performance |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
Cessna abc was on takeoff through approximately 50 ft AGL. Cessna xyw requested departure clearance. Controller issued taxi instructions, 'position and hold' believing cessna xyw was another skyhawk at approach end of runway 35L. Cessna xyw pulled onto runway at midfield below cessna abc. Supplemental information from acn 627377: requested intersection A3 for takeoff on ground, changed to A4. Ground said he would pass it on. Was cleared to position and hold. Read back clearance, looked and after position and hold, another aircraft passed overhead. Controller apologized. No further contact.
Original NASA ASRS Text
Title: COS LCL CTLR EXPERIENCED OPERROR AS DEP ACFT OVERFLEW ACFT AT DOWNFIELD RWY INTXN.
Narrative: CESSNA ABC WAS ON TKOF THROUGH APPROX 50 FT AGL. CESSNA XYW REQUESTED DEP CLRNC. CTLR ISSUED TAXI INSTRUCTIONS, 'POS AND HOLD' BELIEVING CESSNA XYW WAS ANOTHER SKYHAWK AT APCH END OF RWY 35L. CESSNA XYW PULLED ONTO RWY AT MIDFIELD BELOW CESSNA ABC. SUPPLEMENTAL INFO FROM ACN 627377: REQUESTED INTXN A3 FOR TKOF ON GND, CHANGED TO A4. GND SAID HE WOULD PASS IT ON. WAS CLRED TO POS AND HOLD. READ BACK CLRNC, LOOKED AND AFTER POS AND HOLD, ANOTHER ACFT PASSED OVERHEAD. CTLR APOLOGIZED. NO FURTHER CONTACT.
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.