Flight Data Recorder | Cockpit Voice Recorder | FDR And CVR | Equipment Recording System | Lecture 6

[@Romaniatheball]

Let me know A Cockpit Voice Recorder (CVR) is a critical piece of equipment in aircraft designed to record audio from the cockpit during a flight. Its main purpose is to capture conversations between the flight crew, sounds from the cockpit (such as alarms and engine noise), and radio communications. Here's how it works: ### 1. **Microphones** - The CVR typically uses multiple microphones to capture audio: - **Headset microphones** for each pilot. - **Overhead area microphone** to record general cockpit sounds, such as switches being operated, alarms, and any conversations that are not picked up by the headsets. ### 2. **Recording** - The CVR continuously records the last **two hours** of cockpit audio (in modern systems). Older models recorded up to **30 minutes**. - The device uses a loop system, where new recordings overwrite the oldest data. This ensures that the most recent conversations are always available, particularly in the event of an accident or incident. ### 3. **Data Storage** - Modern CVRs store data digitally on **solid-state memory** for durability and reliability. - Older CVRs used **magnetic tape**, similar to how audio cassettes work, but this has largely been phased out. ### 4. **Crash Survivability** - The CVR is housed in a highly durable, fireproof, and impact-resistant case designed to withstand extreme conditions, including: - **High impact** (up to 3,400 Gs). - **Fire** (up to 1,100°C for 60 minutes). - **Deep-sea submersion** (up to 6,000 meters underwater). - It is usually located in the tail of the aircraft, as this is often the part least affected by a crash. ### 5. **Recovery and Analysis** - After an accident, the CVR is retrieved and sent to specialists for analysis. - The recorded data is used to understand what happened in the moments leading up to the incident, particularly by reviewing the crew’s conversations, alarm sounds, and other cockpit noises. - Investigators use the information to identify human or technical failures and improve aviation safety. ### 6. **CVR vs. FDR** - The CVR is often paired with a **Flight Data Recorder (FDR)**, which records technical flight data like altitude, speed, and control inputs. - Together, they provide a comprehensive picture of the flight during an accident investigation. CVRs play a vital role in improving aviation safety by helping investigators reconstruct events and prevent similar incidents in the future.

[@idk-lg7wi]

Does this apply for a specific plane or all aircraft?

[@VietnamENGLofichannel]

All aircraft

[@Canwejusthavefun]

​that comment was 2 months ago