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Commuter air carrier PIC allows acceptance of another aircraft's clearance and deviates from his assigned altitude.
| Attributes | |
| ACN | 176896 |
| Time | |
| Date | 199104 |
| Day | Sat |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : dfw |
| State Reference | TX |
| Altitude | msl bound lower : 7000 msl bound upper : 7900 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | Light Transport, Low Wing, 2 Turboprop Eng |
| Flight Phase | climbout : intermediate altitude cruise other |
| Route In Use | enroute airway : zfw |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : commercial pilot : atp |
| Experience | flight time last 90 days : 260 flight time total : 8800 flight time type : 2200 |
| ASRS Report | 176896 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| Events | |
| Anomaly | altitude deviation : excursion from assigned altitude non adherence : clearance other anomaly other |
| Independent Detector | other controllera |
| Resolutory Action | controller : issued new clearance flight crew : returned to intended course or assigned course other |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
Departing dfw was stepped climbed to 7000'. We were then climbed to 15000'. I observed the first officer keying the microphone to answer the call. I didn't hear the transmitted reply, but that isn't unusual in this fleet of aircraft. I set the altitude in the altitude reminder and initiated the climb. There wasn't any discussion as to what our actions were, indicating complete agreement of our actions and what we heard. Climbing through 7900', we were given an immediate turn, 15 degrees right, and a descent to 7000', which we complied with. At no time did we ever see the other aircraft. Chain of events: it was a normal flight, actions that each of us have accomplished thousands of times in our flying experience. It occurred on the second day of a 4 day trip. Rest consisted of off-duty on fri at PM20 hours, at the hotel by PM00 hours and nin bed by PM00. We each had an AM30 wake-up call with approximately 5 1/2-6 hours sleep. Neither of us felt well-rested the next morning. There were 2 other aircraft on the frequency at the same time, one of which was given clearance to 15000' at the same time that our infraction occurred, the other being company air carrier. While in this instance the call signs are different, abc vs xyz, there are times when the call signs are similar. In retrospect and in the future, all clrncs should be read back and verified by both pilots, no matter how positive your beliefs.
Original NASA ASRS Text
Title: COMMUTER ACR PIC ALLOWS ACCEPTANCE OF ANOTHER ACFT'S CLRNC AND DEVIATES FROM HIS ASSIGNED ALT.
Narrative: DEPARTING DFW WAS STEPPED CLBED TO 7000'. WE WERE THEN CLBED TO 15000'. I OBSERVED THE F/O KEYING THE MIC TO ANSWER THE CALL. I DIDN'T HEAR THE XMITTED REPLY, BUT THAT ISN'T UNUSUAL IN THIS FLEET OF ACFT. I SET THE ALT IN THE ALT REMINDER AND INITIATED THE CLB. THERE WASN'T ANY DISCUSSION AS TO WHAT OUR ACTIONS WERE, INDICATING COMPLETE AGREEMENT OF OUR ACTIONS AND WHAT WE HEARD. CLBING THROUGH 7900', WE WERE GIVEN AN IMMEDIATE TURN, 15 DEGS RIGHT, AND A DSNT TO 7000', WHICH WE COMPLIED WITH. AT NO TIME DID WE EVER SEE THE OTHER ACFT. CHAIN OF EVENTS: IT WAS A NORMAL FLT, ACTIONS THAT EACH OF US HAVE ACCOMPLISHED THOUSANDS OF TIMES IN OUR FLYING EXPERIENCE. IT OCCURRED ON THE SECOND DAY OF A 4 DAY TRIP. REST CONSISTED OF OFF-DUTY ON FRI AT PM20 HRS, AT THE HOTEL BY PM00 HRS AND NIN BED BY PM00. WE EACH HAD AN AM30 WAKE-UP CALL WITH APPROX 5 1/2-6 HRS SLEEP. NEITHER OF US FELT WELL-RESTED THE NEXT MORNING. THERE WERE 2 OTHER ACFT ON THE FREQ AT THE SAME TIME, ONE OF WHICH WAS GIVEN CLRNC TO 15000' AT THE SAME TIME THAT OUR INFRACTION OCCURRED, THE OTHER BEING COMPANY ACR. WHILE IN THIS INSTANCE THE CALL SIGNS ARE DIFFERENT, ABC VS XYZ, THERE ARE TIMES WHEN THE CALL SIGNS ARE SIMILAR. IN RETROSPECT AND IN THE FUTURE, ALL CLRNCS SHOULD BE READ BACK AND VERIFIED BY BOTH PLTS, NO MATTER HOW POSITIVE YOUR BELIEFS.
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.