 |
37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
|
After leaving FL320 medium large transport instructed to des to FL310 after being initially cleared to FL350. PIC captain observed opposite direction traffic pass 1 minute later at FL330.
| Attributes | |
| ACN | 79866 |
| Time | |
| Date | 198801 |
| Day | Fri |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | atc facility : cvg |
| State Reference | OH |
| Altitude | msl bound lower : 31000 msl bound upper : 35000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Night |
| Aircraft 1 | |
| Controlling Facilities | artcc : zid |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Large Transport, Low Wing, 2 Turbojet Eng |
| Flight Phase | climbout : intermediate altitude cruise other descent other |
| Route In Use | departure other enroute : direct |
| Flight Plan | IFR |
| Aircraft 2 | |
| Make Model Name | Any Unknown or Unlisted Aircraft Manufacturer |
| Flight Phase | cruise other |
| Route In Use | enroute : direct |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 150 flight time total : 6000 flight time type : 400 |
| ASRS Report | 79866 |
| Person 2 | |
| Function | flight crew : first officer flight crew : single pilot |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 180 flight time total : 10000 flight time type : 1500 |
| Events | |
| Anomaly | other anomaly other |
| Independent Detector | atc equipment other atc equipment : unspecified other controllera |
| Resolutory Action | controller : issued new clearance flight crew : exited adverse environment other |
| Consequence | Other |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Deviation |
Narrative:
We were in our climb from cmh to dfw, with a clearance to FL310. Passing FL280, ind center asked for a wind report, which we gave. Ind center then issued climb clearance to FL350. Passing FL320, ind center asked our altitude, then gave the clearance, 'des to FL310.' we acknowledged and I asked if there was a traffic problem. The reply was, 'not yet, but I need you level in 1 min.' traffic passed about 1 min later opp dir at FL330. Ind center then asked what altitude we had been clrd to, to which we responded FL350. I had read back the clearance and the first officer set the altitude alert. We are sure the clearance was given in error to FL350. Also, the other aircraft was coming from another controllers airspace. No traffic conflict occurred.
Original NASA ASRS Text
Title: AFTER LEAVING FL320 MLG INSTRUCTED TO DES TO FL310 AFTER BEING INITIALLY CLEARED TO FL350. PIC CAPT OBSERVED OPPOSITE DIRECTION TRAFFIC PASS 1 MINUTE LATER AT FL330.
Narrative: WE WERE IN OUR CLB FROM CMH TO DFW, WITH A CLRNC TO FL310. PASSING FL280, IND CENTER ASKED FOR A WIND RPT, WHICH WE GAVE. IND CENTER THEN ISSUED CLB CLRNC TO FL350. PASSING FL320, IND CENTER ASKED OUR ALT, THEN GAVE THE CLRNC, 'DES TO FL310.' WE ACKNOWLEDGED AND I ASKED IF THERE WAS A TFC PROB. THE REPLY WAS, 'NOT YET, BUT I NEED YOU LEVEL IN 1 MIN.' TFC PASSED ABOUT 1 MIN LATER OPP DIR AT FL330. IND CENTER THEN ASKED WHAT ALT WE HAD BEEN CLRD TO, TO WHICH WE RESPONDED FL350. I HAD READ BACK THE CLRNC AND THE F/O SET THE ALT ALERT. WE ARE SURE THE CLRNC WAS GIVEN IN ERROR TO FL350. ALSO, THE OTHER ACFT WAS COMING FROM ANOTHER CTLRS AIRSPACE. NO TFC CONFLICT OCCURRED.
Data retrieved from NASA's ASRS site as of August 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.