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First officer of an medium large transport advised ARTCC radar controller of incorrect heading that the captain had turned to as instructed by the controller. Consequently, since the controller had issued a heading change previously, the controller gave an additional turn in, by doubling the first, in order to assure separation of a traffic conflict.
| Attributes | |
| ACN | 423860 |
| Time | |
| Date | 199812 |
| Day | Mon |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : eph |
| State Reference | WA |
| Altitude | msl bound lower : 21500 msl bound upper : 21500 |
| Environment | |
| Flight Conditions | IMC |
| Light | Daylight |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | Commercial Fixed Wing |
| Route In Use | enroute airway : zse |
| Flight Plan | IFR |
| Aircraft 2 | |
| Make Model Name | Any Unknown or Unlisted Aircraft Manufacturer |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Experience | flight time last 90 days : 250 flight time total : 4800 flight time type : 2300 |
| ASRS Report | 423860 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : required legal separation other anomaly other |
| Independent Detector | other flight crewa |
| Resolutory Action | other |
| Consequence | Other |
| Supplementary | |
| Air Traffic Incident | Pilot Deviation |
Narrative:
While climbing on J70, ATC asked us to turn 20 degrees right for traffic. (Current heading of 060 degrees to maintain J70.) captain turned to 080 degrees. Center asked our heading, I replied 045 degrees -- my mistake in reading directional gyro. She (center) asked us to turn to 100 degrees. The captain turned an additional 20 degrees right to a 100 degree heading. (Before I was able to correct my mistake in reading the directional gyro, she gave us the 100 degree heading.) while center and I resolved the miscom, she (center) informed me there was a 'conflict.' all of center's instructions were followed to the letter, I just read off the wrong heading after center asked us to turn 20 degrees right. TCASII was inoperative (MEL).
Original NASA ASRS Text
Title: FO OF AN MLG ADVISED ARTCC RADAR CTLR OF INCORRECT HDG THAT THE CAPT HAD TURNED TO AS INSTRUCTED BY THE CTLR. CONSEQUENTLY, SINCE THE CTLR HAD ISSUED A HDG CHANGE PREVIOUSLY, THE CTLR GAVE AN ADDITIONAL TURN IN, BY DOUBLING THE FIRST, IN ORDER TO ASSURE SEPARATION OF A TFC CONFLICT.
Narrative: WHILE CLBING ON J70, ATC ASKED US TO TURN 20 DEGS R FOR TFC. (CURRENT HDG OF 060 DEGS TO MAINTAIN J70.) CAPT TURNED TO 080 DEGS. CTR ASKED OUR HDG, I REPLIED 045 DEGS -- MY MISTAKE IN READING DIRECTIONAL GYRO. SHE (CTR) ASKED US TO TURN TO 100 DEGS. THE CAPT TURNED AN ADDITIONAL 20 DEGS R TO A 100 DEG HDG. (BEFORE I WAS ABLE TO CORRECT MY MISTAKE IN READING THE DIRECTIONAL GYRO, SHE GAVE US THE 100 DEG HDG.) WHILE CTR AND I RESOLVED THE MISCOM, SHE (CTR) INFORMED ME THERE WAS A 'CONFLICT.' ALL OF CTR'S INSTRUCTIONS WERE FOLLOWED TO THE LETTER, I JUST READ OFF THE WRONG HDG AFTER CTR ASKED US TO TURN 20 DEGS R. TCASII WAS INOP (MEL).
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.