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A B737's raas interfered with ATC communications as the crew was preparing for takeoff.
| Attributes | |
| ACN | 983694 |
| Time | |
| Date | 201112 |
| Local Time Of Day | 1801-2400 |
| Place | |
| Locale Reference | ZZZ.Airport |
| State Reference | US |
| Environment | |
| Light | Night |
| Aircraft 1 | |
| Make Model Name | B737 Next Generation Undifferentiated |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Taxi |
| Flight Plan | IFR |
| Component | |
| Aircraft Component | GPWS |
| Person 1 | |
| Function | Captain Pilot Flying |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Events | |
| Anomaly | Aircraft Equipment Problem Less Severe Flight Deck / Cabin / Aircraft Event Other / Unknown |
Narrative:
As we approached the hold short line the raas blared out its usual asinine; irrelevant; and pointless warning. At the same time; tower made a transmission that began; so far as we could hear through the inane noise from the raas; with 'air carrier...' as usual whenever that thing goes off simultaneously with what might be an amended clearance for us; we couldn't tell what tower had said. After a pause in which no one else responded to the raas-blocked transmission; we asked for a repeat and discovered that we had been cleared for takeoff. The raas system did its usual fine job of rendering critical ATC communications indecipherable. The recent elimination of approximately 50% of the raas callouts improved the system immeasurably. Now; eliminate the other 50% and you will have perfected it. Get rid of the audio portion of the system before it causes an accident.
Original NASA ASRS Text
Title: A B737's RAAS interfered with ATC communications as the crew was preparing for takeoff.
Narrative: As we approached the hold short line the RAAS blared out its usual asinine; irrelevant; and pointless warning. At the same time; Tower made a transmission that began; so far as we could hear through the inane noise from the RAAS; with 'Air Carrier...' As usual whenever that thing goes off simultaneously with what might be an amended clearance for us; we couldn't tell what Tower had said. After a pause in which no one else responded to the RAAS-blocked transmission; we asked for a repeat and discovered that we had been cleared for takeoff. The RAAS system did its usual fine job of rendering critical ATC communications indecipherable. The recent elimination of approximately 50% of the RAAS callouts improved the system immeasurably. Now; eliminate the other 50% and you will have perfected it. Get rid of the audio portion of the system before it CAUSES an accident.
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.