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An air carrier B737 crew may have misunderstood its heading clearance. They flew direct to btr when they were expected to fly 280 degrees. Possible error admitted.
| Attributes | |
| ACN | 340837 |
| Time | |
| Date | 199607 |
| Day | Mon |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : mcb airport : btr |
| State Reference | MS |
| Altitude | msl bound lower : 25000 msl bound upper : 25000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zhu |
| Operator | common carrier : air carrier |
| Make Model Name | B727-200 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | other |
| Route In Use | enroute : on vectors enroute : direct |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 150 flight time total : 10000 flight time type : 4000 |
| ASRS Report | 340837 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 188 flight time total : 14000 |
| ASRS Report | 340860 |
| Events | |
| Anomaly | non adherence : clearance other anomaly other other spatial deviation |
| Independent Detector | atc equipment other atc equipment : unspecified other controllera |
| Resolutory Action | other |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
After holding at mccomb while waiting for a thunderstorm to pass new orleans, the decision was made to proceed to the alternate for fuel. From a position about 20 NM northeast at mcb at FL250, a clearance was issued to turn to a heading of 280 degrees and proceed to btr. Some time later the controller asked what our heading was, and we replied 210 degrees. He advised us we were assigned a 280 degree heading, but we were now clear of traffic, proceed to btr. We understood the original clearance to be 'head 280 degrees, when able, direct btr.' from the cockpit, no conflicts were noted either visually or on TCASII.
Original NASA ASRS Text
Title: AN ACR B737 CREW MAY HAVE MISUNDERSTOOD ITS HDG CLRNC. THEY FLEW DIRECT TO BTR WHEN THEY WERE EXPECTED TO FLY 280 DEGS. POSSIBLE ERROR ADMITTED.
Narrative: AFTER HOLDING AT MCCOMB WHILE WAITING FOR A TSTM TO PASS NEW ORLEANS, THE DECISION WAS MADE TO PROCEED TO THE ALTERNATE FOR FUEL. FROM A POS ABOUT 20 NM NE AT MCB AT FL250, A CLRNC WAS ISSUED TO TURN TO A HDG OF 280 DEGS AND PROCEED TO BTR. SOME TIME LATER THE CTLR ASKED WHAT OUR HEADING WAS, AND WE REPLIED 210 DEGS. HE ADVISED US WE WERE ASSIGNED A 280 DEG HDG, BUT WE WERE NOW CLR OF TFC, PROCEED TO BTR. WE UNDERSTOOD THE ORIGINAL CLRNC TO BE 'HEAD 280 DEGS, WHEN ABLE, DIRECT BTR.' FROM THE COCKPIT, NO CONFLICTS WERE NOTED EITHER VISUALLY OR ON TCASII.
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.