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Nct controller described a communications failure involving a visual approach clearance; the sfo landing flight crew failing to respond with their 'call sign.'
| Attributes | |
| ACN | 965906 |
| Time | |
| Date | 201108 |
| Local Time Of Day | 0001-0600 |
| Place | |
| Locale Reference | SFO.Airport |
| State Reference | CA |
| Environment | |
| Light | Night |
| Aircraft 1 | |
| Make Model Name | A340 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Descent |
| Route In Use | Vectors |
| Flight Plan | IFR |
| Person 1 | |
| Function | Approach |
| Qualification | Air Traffic Control Fully Certified |
| Events | |
| Anomaly | ATC Issue All Types Aircraft Equipment Problem Less Severe |
Narrative:
Air carrier X [was] on base for sfo [runway] 28L. I turned the aircraft at air carrier Y and issued traffic. Air carrier X reported traffic in sight and I instructed air carrier X to maintain visual separation. Air carrier X replied without call sign. I again told air carrier X to maintain visual separation and it responded without call sign. I then issued the airport position; which air carrier X reported in sight and I issued a visual approach to [runway] 28L; 'follow the A319.' once again air carrier X responded without a call sign. I told air carrier X he needed to respond with a call sign and he didn't. He then went a couple of transmissions without answering. I was told by the flm who had been monitoring the situation to send air carrier X around; but air carrier X finally answered with a call sign and I issued appropriate instructions and shipped the aircraft to sfo [tower]. Air carrier X called and talked to the omic. He said the first officer's headset was malfunctioning; but the crew didn't realize it until they got on the ground and it started doing the same thing it had done on my frequency.
Original NASA ASRS Text
Title: NCT Controller described a communications failure involving a visual approach clearance; the SFO landing flight crew failing to respond with their 'call sign.'
Narrative: Air Carrier X [was] on base for SFO [Runway] 28L. I turned the aircraft at Air Carrier Y and issued traffic. Air Carrier X reported traffic in sight and I instructed Air Carrier X to maintain visual separation. Air Carrier X replied without call sign. I again told Air Carrier X to maintain visual separation and it responded without call sign. I then issued the airport position; which Air Carrier X reported in sight and I issued a visual approach to [Runway] 28L; 'Follow the A319.' Once again Air Carrier X responded without a call sign. I told Air Carrier X he needed to respond with a call sign and he didn't. He then went a couple of transmissions without answering. I was told by the FLM who had been monitoring the situation to send Air Carrier X around; but Air Carrier X finally answered with a call sign and I issued appropriate instructions and shipped the aircraft to SFO [Tower]. Air Carrier X called and talked to the OMIC. He said the First Officer's headset was malfunctioning; but the crew didn't realize it until they got on the ground and it started doing the same thing it had done on my frequency.
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.