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ZDC controller experienced operational error at FL320 when issuing climb clearance through occupied altitude.
| Attributes | |
| ACN | 688396 |
| Time | |
| Date | 200602 |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | navaid : ilm.vortac |
| State Reference | NC |
| Altitude | msl single value : 32000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zdc.artcc tower : ord.tower |
| Operator | common carrier : air carrier |
| Make Model Name | MD-80 Series (DC-9-80) Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | cruise : enroute altitude change |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | artcc : zdc.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | Any Unknown or Unlisted Aircraft Manufacturer |
| Operating Under FAR Part | Part 121 |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Experience | controller radar : 13 |
| ASRS Report | 688396 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| ASRS Report | 688571 |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : required legal separation |
| Independent Detector | aircraft equipment : tcas other controllera other controllerb other flight crewa |
| Resolutory Action | flight crew : took precautionary avoidance action |
| Consequence | faa : investigated |
| Supplementary | |
| Problem Areas | ATC Human Performance |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
Air carrier Y was at FL320 requesting FL340. Air carrier Y was given clearance to FL340; which put air carrier X in conflict with air carrier Y. Supplemental information from acn 688571: requested climb to FL340 10-15 mins prior to event. Again; requested and received clearance to FL340. After confirming clearance; set climb on tri; turned off engine 'syc' and started climb in performance mode. As the aircraft started the climb; we received TA; looked at TCAS and saw target approximately 800 ft above our altitude and quickly leveled off where we then received the alert 'monitor vertical speed.' airbus passed over our aircraft by 800 ft. We told ATC we would stay at FL320. We then received clearance to maintain FL320. Airbus stated that they too received a TA. No other word concerning event was received from ATC.
Original NASA ASRS Text
Title: ZDC CTLR EXPERIENCED OPERROR AT FL320 WHEN ISSUING CLB CLRNC THROUGH OCCUPIED ALT.
Narrative: ACR Y WAS AT FL320 REQUESTING FL340. ACR Y WAS GIVEN CLRNC TO FL340; WHICH PUT ACR X IN CONFLICT WITH ACR Y. SUPPLEMENTAL INFO FROM ACN 688571: REQUESTED CLB TO FL340 10-15 MINS PRIOR TO EVENT. AGAIN; REQUESTED AND RECEIVED CLRNC TO FL340. AFTER CONFIRMING CLRNC; SET CLB ON TRI; TURNED OFF ENG 'SYC' AND STARTED CLB IN PERFORMANCE MODE. AS THE ACFT STARTED THE CLB; WE RECEIVED TA; LOOKED AT TCAS AND SAW TARGET APPROX 800 FT ABOVE OUR ALT AND QUICKLY LEVELED OFF WHERE WE THEN RECEIVED THE ALERT 'MONITOR VERT SPD.' AIRBUS PASSED OVER OUR ACFT BY 800 FT. WE TOLD ATC WE WOULD STAY AT FL320. WE THEN RECEIVED CLRNC TO MAINTAIN FL320. AIRBUS STATED THAT THEY TOO RECEIVED A TA. NO OTHER WORD CONCERNING EVENT WAS RECEIVED FROM ATC.
Data retrieved from NASA's ASRS site as of January 2009 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.