B737 Flight Recorder Panel

FLT Recorder
P5 AFT OVERHEAD

Flight Recorder Test Switch

  • NORMAL (guarded position):
    • In flight: The recorder operates whenever electrical power is available.
    • On the ground: At least one engine must be operating.
  • TEST: Powers the flight recorder on the ground.

OFF Light (amber)

  • ILLUMINATED:
    • Indicates the recorder is not operating or the test is invalid.
    • Possible causes:
      • Power failure.
      • Loss of input data.
      • Electronic malfunction.