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A B757 first officer's microphone selector malfunctioned; unknown to the crew. A flight attendant was injured during takeoff because takeoff alert was not heard. Near the destination ATC also did not receive an initial call.
| Attributes | |
| ACN | 959332 |
| Time | |
| Date | 201107 |
| Local Time Of Day | 0601-1200 |
| Place | |
| Locale Reference | ZZZ.Airport |
| State Reference | US |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Make Model Name | B757-200 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Takeoff |
| Flight Plan | IFR |
| Component | |
| Aircraft Component | Cockpit/Cabin Communication |
| Person 1 | |
| Function | Pilot Not Flying First Officer |
| Experience | Flight Crew Last 90 Days 240 Flight Crew Total 16000 Flight Crew Type 5000 |
| Person 2 | |
| Function | Pilot Flying Captain |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Experience | Flight Crew Last 90 Days 200 Flight Crew Total 20000 Flight Crew Type 3000 |
| Events | |
| Anomaly | Aircraft Equipment Problem Critical Flight Deck / Cabin / Aircraft Event Illness |
Narrative:
During cruise; the lead flight attendant informed me that the 'flight attendants prepare for takeoff' PA was not heard and that some flight attendants were not seated at the start of the takeoff roll as a result. She later informed me that one flight attendant injured her ankle. On arrival; talking to approach; I made the 'prepare for landing' PA and subsequently was not able to be heard by ATC. I then drew the conclusion that the PA was not heard due to microphone selector malfunction. All other sops and fars were followed. In the future; I will be sure I hear my side tone on all transmissions to make sure they went out properly..
Original NASA ASRS Text
Title: A B757 First Officer's microphone selector malfunctioned; unknown to the crew. A Flight Attendant was injured during takeoff because takeoff alert was not heard. Near the destination ATC also did not receive an initial call.
Narrative: During cruise; the Lead Flight Attendant informed me that the 'flight attendants prepare for takeoff' PA was not heard and that some flight attendants were not seated at the start of the takeoff roll as a result. She later informed me that one Flight Attendant injured her ankle. On arrival; talking to Approach; I made the 'prepare for landing' PA and subsequently was not able to be heard by ATC. I then drew the conclusion that the PA was not heard due to microphone selector malfunction. All other SOPs and FARs were followed. In the future; I will be sure I hear my side tone on all transmissions to make sure they went out properly..
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.