Spanair accident at Madrid

[justme69]

Wodrick:

Thanks for participating. Believe me, we all would like to have the facts, but they are considered "secret" and most of the vital ones are still hidden from the public, so we have to work with what we got.

I have a question perhaps you or other engineers can answer.

Let's assume the sensors in charge and relays in charge of air/ground logic were fine (as the DFR seems to indicate).

Let's assume even the R2-5 relay was fine (i.e. operating as designed).

-Is there a circuit breaker in the system that could've produced "air mode" on the RAT heater and the TOWS alarm with very few other signs?
-What is it called (i.e. "L/H GND CTRL RLY C/B")?
-What other symptons would it have produced? (i.e. does it affect other relays' logic)
-Would the FDR still record a ground logic status change from the sensors with this c/b "off"?
-When you guys have to test "on the air" things on the MD-82's while on the ground (i.e. RAT heater, strobes, etc) ... how do you do it?

Regards.