DVDR

Question 1

DVR check Power UP check

Answer 1

Universal DVDR:
a. Press and hold TEST button for 2 seconds. Verify no fail messages displayed on EICAS, and observe the following test result:
The FDR 1 and CVR 1 PASS/FAIL lights flash during 10 seconds. After 10 seconds, the FDR 1 and CVR 1 PASS/FAIL lights illuminate steady in green, indicating the completion of a successful test.
b. After the DVDR 1 test finishes, the DVDR 2 test will automatically start. Verify the following test result:
The FDR 2 and CVR 2 PASS/FAIL lights flash during 10 seconds. After 10 seconds, the FDR 2 and CVR 2 PASS/FAIL lights illuminate steady in green, indicating the completion of a successful test.
c. If a failure is found, the corresponding FDR/CVR fail light indicator will illuminate steady in amber

Question 2

Selector switch

Answer 2

Selects forward and afterward DVDR switch to set the source of the headphone audio for the aural indication when the DVDR test is successful (to maintenance task only).

Question 3

HEADPHONE JACK

Answer 3

Monitors tone transmission during test or to monitor playback of voice audio.

Question 4

TEST BUTTON

Answer 4

Simultaneously tests all CVR and FDR functions on both DVDR.

Question 5

CVR ERASE BUTTON

Answer 5

Erases the recorded audio information, provided that the airplane is on the ground and parking brake is set.

Question 6

DIGITAL VOICE DATA RECORDER (DVDR) SYSTEM

Answer 6

A. The digital voice data recorder system (DVDR) combines a flight data recorder (FDR) and a cockpit voice recorder (CVR) in a single unit. Two DVDR units are installed. DVDR 1 is installed in the forward electronic bay, and the DVDR 2 in the aft electronic bay. Each unit receives, records and preserves all required data parameters and voice recordings from the cockpit crew and area microphones.

B. The DVDR unit is capable of recording the last 120 minutes of audio information from cockpit area microphones, 120 minutes of datalink data and primary crew microphones and 25 hours of flight data.

C. The DVDR automatically starts recording audio information as soon as power up is performed and continues until the power down. The flight data begins to be recorded when the first engine is started.

D. The DVDR’s FDR data is available through the MCDU for maintenance purposes only.

E. If the DVDR power system fails, an EICAS message is generated to indicate the failure. All DVDR EICAS messages are advisory and some of them are inhibited
in critical phases of flight, such as takeoff.