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A B737-800-900 pilot has concerns about the fact that it is hard to hear ATC over the aural warnings that come over the headset.
| Attributes | |
| ACN | 624836 |
| Time | |
| Date | 200407 |
| Day | Sat |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : zhu.artcc |
| State Reference | TX |
| Altitude | msl single value : 27000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zhu.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | B737-800 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | cruise : level |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| ASRS Report | 624836 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Events | |
| Anomaly | aircraft equipment problem : less severe |
| Independent Detector | other flight crewa |
| Resolutory Action | none taken : anomaly accepted |
| Supplementary | |
| Problem Areas | Aircraft |
| Primary Problem | Aircraft |
Narrative:
Aircraft XXX is among many of the B737-900's, and a few B737-800's, where the altitude alerter and radio altimeter callouts sound through the pilot's headset, as well as the aircraft's overhead speakers. This is a hazardous condition, because of the volume level of the alerts, and the possibility of blocking out ATC instructions, particularly during final approach, when the tower could possibly order the flight to go around while '50-30-20-10' is going on. I really feel that we need to disable this function, for enhanced safety of flight.
Original NASA ASRS Text
Title: A B737-800-900 PLT HAS CONCERNS ABOUT THE FACT THAT IT IS HARD TO HEAR ATC OVER THE AURAL WARNINGS THAT COME OVER THE HEADSET.
Narrative: ACFT XXX IS AMONG MANY OF THE B737-900'S, AND A FEW B737-800'S, WHERE THE ALT ALERTER AND RADIO ALTIMETER CALLOUTS SOUND THROUGH THE PLT'S HEADSET, AS WELL AS THE ACFT'S OVERHEAD SPEAKERS. THIS IS A HAZARDOUS CONDITION, BECAUSE OF THE VOLUME LEVEL OF THE ALERTS, AND THE POSSIBILITY OF BLOCKING OUT ATC INSTRUCTIONS, PARTICULARLY DURING FINAL APCH, WHEN THE TWR COULD POSSIBLY ORDER THE FLT TO GO AROUND WHILE '50-30-20-10' IS GOING ON. I REALLY FEEL THAT WE NEED TO DISABLE THIS FUNCTION, FOR ENHANCED SAFETY OF FLT.
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.