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Air carrier at FL330 with four digit flight number accepted clearance and initiated a descent to FL300 only to discover that the descent clearance was issued to a company aircraft with a similar four digit flight number.
| Attributes | |
| ACN | 849298 |
| Time | |
| Date | 200908 |
| Local Time Of Day | 0601-1200 |
| Place | |
| Locale Reference | ZDC.ARTCC |
| State Reference | VA |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Make Model Name | B737-400 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Descent |
| Flight Plan | IFR |
| Person 1 | |
| Function | Captain |
| Qualification | Flight Crew Flight Engineer Flight Crew Air Transport Pilot (ATP) Flight Crew Commercial |
| Experience | Flight Crew Last 90 Days 130 Flight Crew Total 17862 Flight Crew Type 8100 |
| Events | |
| Anomaly | Deviation - Altitude Excursion From Assigned Altitude Deviation - Procedural Clearance |
Narrative:
My flight acknowledged a descent clearance to FL300. The pilot flying commenced descent from FL330; upon reaching FL318; the controller called instructing our flight to climb to FL330; which we complied with. The controller then stated descent clearance was previously given to company aircraft. Event happened because of 'classic' readback error; that wasn't responded to because of busy controller; and pilot flying and pilot monitoring not hearing confirmation of clearance.
Original NASA ASRS Text
Title: Air carrier at FL330 with four digit flight number accepted clearance and initiated a descent to FL300 only to discover that the descent clearance was issued to a company aircraft with a similar four digit flight number.
Narrative: My flight acknowledged a descent clearance to FL300. The pilot flying commenced descent from FL330; upon reaching FL318; the Controller called instructing our flight to climb to FL330; which we complied with. The Controller then stated descent clearance was previously given to company aircraft. Event happened because of 'classic' readback error; that wasn't responded to because of busy Controller; and pilot flying and pilot monitoring not hearing confirmation of clearance.
Data retrieved from NASA's ASRS site as of April 2012 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.