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Operational error near midair collision when arrival air carrier DC10 without landing clearance executes go around runway 12 at the same time an air carrier B737 is departing runway 19R. Both aircraft took evasive action to avoid the other. Reporter stated the local controller was not aware of the DC10 which called 5 times for landing clearance.
| Attributes | |
| ACN | 374962 |
| Time | |
| Date | 199707 |
| Day | Mon |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : iad |
| State Reference | DC |
| Altitude | agl bound lower : 800 agl bound upper : 999 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tower : iad |
| Operator | common carrier : air carrier |
| Make Model Name | DC-10 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | cruise other descent : approach landing : go around |
| Route In Use | arrival other |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | common carrier : air carrier |
| Make Model Name | B737 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | climbout : takeoff climbout : initial cruise other |
| Route In Use | departure other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | other personnel other |
| Qualification | controller : radar controller : developmental |
| Experience | controller military : 3 controller radar : 22 controller supervisory : 9 |
| ASRS Report | 374962 |
| Person 2 | |
| Affiliation | government : faa |
| Function | controller : local |
| Qualification | controller : radar |
| Experience | controller military : 4 controller radar : 10 |
| ASRS Report | 375178 |
| Events | |
| Anomaly | conflict : nmac non adherence : published procedure non adherence : required legal separation |
| Independent Detector | other flight crewa |
| Resolutory Action | flight crew : took evasive action other |
| Consequence | Other |
| Miss Distance | horizontal : 1000 vertical : 250 |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
Aircraft #1 on a missed approach/go around runway 12. Aircraft #2 departing runway 19R. Aircraft #1 did not receive landing clearance and executed go around. Aircraft #2 rotated and saw the traffic on an intercept, both aircraft descended and turned left to avoid each other. The local controller was coordinating a previous go around on runway 19R and was distraction by frequency congestion and trouble coordinating on landlines. Aircraft #2 should not have been released, local controller was not aware of the DC10 on approach to runway 12, which called 5 times to get clearance to land but to no avail. Local controller was way behind the power curve, and apparently did not realize the situation was developing. An assistant local controller or cabin attendant coordinator should have been assisting the local controller. Supplemental information from acn 375178: appeared both B737 and DC10 took evasive action at departure ends of runway 19R and runway 12. Aircraft missed by less than 1000 ft after a considerable amount of maneuvering. 2 tower frequencys in use, local control east 128.42, local control west 120.1. Operational error occurred on frequency 120.1 (local control west). Local control west was responsible for aircraft involved. I was working local control east.
Original NASA ASRS Text
Title: OPERROR NMAC WHEN ARR ACR DC10 WITHOUT LNDG CLRNC EXECUTES GAR RWY 12 AT THE SAME TIME AN ACR B737 IS DEPARTING RWY 19R. BOTH ACFT TOOK EVASIVE ACTION TO AVOID THE OTHER. RPTR STATED THE LCL CTLR WAS NOT AWARE OF THE DC10 WHICH CALLED 5 TIMES FOR LNDG CLRNC.
Narrative: ACFT #1 ON A MISSED APCH/GAR RWY 12. ACFT #2 DEPARTING RWY 19R. ACFT #1 DID NOT RECEIVE LNDG CLRNC AND EXECUTED GAR. ACFT #2 ROTATED AND SAW THE TFC ON AN INTERCEPT, BOTH ACFT DSNDED AND TURNED L TO AVOID EACH OTHER. THE LCL CTLR WAS COORDINATING A PREVIOUS GAR ON RWY 19R AND WAS DISTR BY FREQ CONGESTION AND TROUBLE COORDINATING ON LANDLINES. ACFT #2 SHOULD NOT HAVE BEEN RELEASED, LCL CTLR WAS NOT AWARE OF THE DC10 ON APCH TO RWY 12, WHICH CALLED 5 TIMES TO GET CLRNC TO LAND BUT TO NO AVAIL. LCL CTLR WAS WAY BEHIND THE PWR CURVE, AND APPARENTLY DID NOT REALIZE THE SIT WAS DEVELOPING. AN ASSISTANT LCL CTLR OR CAB COORDINATOR SHOULD HAVE BEEN ASSISTING THE LCL CTLR. SUPPLEMENTAL INFO FROM ACN 375178: APPEARED BOTH B737 AND DC10 TOOK EVASIVE ACTION AT DEP ENDS OF RWY 19R AND RWY 12. ACFT MISSED BY LESS THAN 1000 FT AFTER A CONSIDERABLE AMOUNT OF MANEUVERING. 2 TWR FREQS IN USE, LCL CTL E 128.42, LCL CTL W 120.1. OPERROR OCCURRED ON FREQ 120.1 (LCL CTL W). LCL CTL W WAS RESPONSIBLE FOR ACFT INVOLVED. I WAS WORKING LCL CTL E.
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.