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TCASII voice noise precludes receipt of TRACON approach controller's instructions for localizer intercept.
| Attributes | |
| ACN | 176912 |
| Time | |
| Date | 199104 |
| Day | Sun |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : ord |
| State Reference | IL |
| Altitude | msl bound lower : 4000 msl bound upper : 4000 |
| Environment | |
| Flight Conditions | IMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : ord tracon : bur |
| Operator | common carrier : air carrier |
| Make Model Name | Large Transport, Low Wing, 3 Turbojet Eng |
| Flight Phase | cruise other descent other |
| Route In Use | enroute : on vectors |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : second officer |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 150 flight time total : 4000 flight time type : 150 |
| ASRS Report | 176912 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | aircraft equipment problem : less severe other anomaly other other spatial deviation |
| Independent Detector | other controllera |
| Resolutory Action | controller : issued new clearance flight crew : became reoriented other |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Aircraft |
| Air Traffic Incident | Pilot Deviation other |
Narrative:
Airlines flight lga to ord descending to 4000' base to final for localizer approach to runway 14L, G/south OTS. The TCAS indicated a resolution conflict and said, 'reduce descent.' it also showed a red target -3 on the TCAS screen and gave a level-off command on the ivsi. Then the symbol went away. The TCAS said, 'clear of conflict,' then gave another command of, 'traffic, traffic,' followed by, 'climb, climb.' these TCAS 'voices' blocked all incoming ATC communications and we could not hear the controller instruction to turn to final. We could not follow the controllers instructions because the TCAS 'voice' in the cockpit was so loud.
Original NASA ASRS Text
Title: TCASII VOICE NOISE PRECLUDES RECEIPT OF TRACON APCH CTLR'S INSTRUCTIONS FOR LOC INTERCEPT.
Narrative: AIRLINES FLT LGA TO ORD DSNDING TO 4000' BASE TO FINAL FOR LOC APCH TO RWY 14L, G/S OTS. THE TCAS INDICATED A RESOLUTION CONFLICT AND SAID, 'REDUCE DSNT.' IT ALSO SHOWED A RED TARGET -3 ON THE TCAS SCREEN AND GAVE A LEVEL-OFF COMMAND ON THE IVSI. THEN THE SYMBOL WENT AWAY. THE TCAS SAID, 'CLR OF CONFLICT,' THEN GAVE ANOTHER COMMAND OF, 'TFC, TFC,' FOLLOWED BY, 'CLB, CLB.' THESE TCAS 'VOICES' BLOCKED ALL INCOMING ATC COMS AND WE COULD NOT HEAR THE CTLR INSTRUCTION TO TURN TO FINAL. WE COULD NOT FOLLOW THE CTLRS INSTRUCTIONS BECAUSE THE TCAS 'VOICE' IN THE COCKPIT WAS SO LOUD.
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.