Display Source

Hallo ,

möchte nicht unhöflich erscheinen, aber such mal danach im FCOM bzw. FCTM danach. Dort findest du alle Infos, die du dazu brauchst. Prinzipiell heißt das, dass beide PDFs von einer anderen Quelle als normal versorgt werden.

Lg

Du meinst wohl die PFDs

Habe einfach nach "b738 display source" gesucht.
Erstes Ergebnis:

Zitat

The DISPLAY SOURCE message is annunciated in air to tell the crew that all the primary display information is from one source and should be compared with all other data sources (standby instruments, raw data, etc.) to validate its accuracy.
Since the DISPLAY SOURCE message is intended to be activated in air and CDS FAULT is intended to be activated on ground, air/ground logic is used by CDS to determine which message is appropriate. The air/ground logic system uses a number of inputs to determine airplane state. One of the inputs used is “engines running”. CDS uses the “engines running” logic as the primary trigger for changing the CDS FAULT message to its in-air counterpart. The “engines running” logic is used in case the air/ground data isn't correct as a result of other air/ground sensing faults.
The DISPLAYS - SOURCE selector is only used on the ground for maintenance purposes (to make all 6 DU's be powered by either DEU 1 or 2). This may be why the switch is a different shape to the other three; if not, it is still a good way to remember that this is a switch that pilots should not touch!

Falls das noch nicht reichen sollte, kann man das Thema ja noch ausweiten.