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Nmm ratcf controller described operational deviation event when incorrect readback was missed; resulting in an altitude descent without required coordination.
| Attributes | |
| ACN | 823305 |
| Time | |
| Date | 200902 |
| Local Time Of Day | 0601-1200 |
| Place | |
| Locale Reference | MEI.VORTAC |
| State Reference | AL |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Make Model Name | Heavy Transport |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Initial Approach |
| Flight Plan | IFR |
| Person 1 | |
| Function | Approach |
| Qualification | Air Traffic Control Fully Certified |
| Experience | Air Traffic Control Military 14 Air Traffic Control Radar 6 Air Traffic Control Supervisory 10 |
| Events | |
| Anomaly | Airspace Violation All Types Deviation - Procedural Published Material / Policy |
Narrative:
While working NMM3 in sup 1 configuration; I descended aircraft X to 2000 ft; then keyed up the coordination line to coordinate the inbound for aircraft X to key tower; during which time aircraft X was reading back the descent clearance. I copied the readback from aircraft X as well as some other transmission from another aircraft. As soon as I completed the coordination for aircraft X heavy; I transmitted on all frequencies 'meridian approach off line say again.' no one replied to my transmission. ZTL then called a short time later and asked if I had descended aircraft Y heavy; looked at that aircraft's data block; and observed them descending out of 8000 ft. I asked aircraft Y heavy what altitude center had cleared them to and they replied that I had descended him to 2000 ft. I told him 'negative; that was for another aircraft; maintain 7;000 ft.' he read back 'roger; maintain 7000 ft.' I then called ZTL back and informed them that aircraft Y had taken another aircraft's descent. I then notified the supervisor of the possible deviation.
Original NASA ASRS Text
Title: NMM RATCF Controller described operational deviation event when incorrect readback was missed; resulting in an altitude descent without required coordination.
Narrative: While working NMM3 in Sup 1 configuration; I descended Aircraft X to 2000 FT; then keyed up the coordination line to coordinate the inbound for Aircraft X to Key Tower; during which time Aircraft X was reading back the descent clearance. I copied the readback from Aircraft X as well as some other transmission from another aircraft. As soon as I completed the coordination for Aircraft X Heavy; I transmitted on all frequencies 'Meridian Approach off line say again.' No one replied to my transmission. ZTL then called a short time later and asked if I had descended Aircraft Y Heavy; looked at that aircraft's data block; and observed them descending out of 8000 FT. I asked Aircraft Y Heavy what altitude Center had cleared them to and they replied that I had descended him to 2000 FT. I told him 'Negative; that was for another aircraft; maintain 7;000 FT.' He read back 'Roger; maintain 7000 FT.' I then called ZTL back and informed them that Aircraft Y had taken another aircraft's descent. I then notified the Supervisor of the possible deviation.
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.