Failure detector - Disable flight termination by default. Modify FD_FAIL parameters description

src/lib/circuit_breaker/circuit_breaker_params.c

@@ -113,7 +113,7 @@ PARAM_DEFINE_INT32(CBRK_AIRSPD_CHK, 0);
  * @category Developer
  * @group Circuit Breaker
  */
-PARAM_DEFINE_INT32(CBRK_FLIGHTTERM, 0);
+PARAM_DEFINE_INT32(CBRK_FLIGHTTERM, 121212);
 
 /**
  * Circuit breaker for engine failure detection

src/modules/commander/PreflightCheck.cpp

@@ -679,7 +679,7 @@ static bool failureDetectorCheck(orb_advert_t *mavlink_log_pub, vehicle_status_s
 	bool success = true;
 
 	if (!prearm) {
-		// Ignore power check after arming.
+		// Ignore failure detector check after arming.
 		return true;
 
 	} else {

src/modules/commander/failure_detector/failure_detector_params.c

@@ -46,7 +46,12 @@
  * FailureDetector Max Roll
  *
  * Maximum roll angle before FailureDetector triggers the attitude_failure flag
- * Does not affect the behavior of the vehicle for now; only for logging
+ * If flight termination is enabled (@CBRK_FLIGHTTERM set to zero), the autopilot
+ * will terminate the flight and set all the outputs to their failsafe value
+ * as soon as the attitude_failure flag is set.
+ *
+ * Setting this parameter to 0 disables the check
+ *
  * @min 0
  * @max 180
  * @unit degrees
@@ -58,7 +63,12 @@ PARAM_DEFINE_INT32(FD_FAIL_R, 60);
  * FailureDetector Max Pitch
  *
  * Maximum pitch angle before FailureDetector triggers the attitude_failure flag
- * Does not affect the behavior of the vehicle for now; only for logging
+ * If flight termination is enabled (@CBRK_FLIGHTTERM set to zero), the autopilot
+ * will terminate the flight and set all the outputs to their failsafe value
+ * as soon as the attitude_failure flag is set.
+ *
+ * Setting this parameter to 0 disables the check
+ *
  * @min 0
  * @max 180
  * @unit degrees