XPLMUnregisterFlightLoopCallback
XPLM_API void XPLMUnregisterFlightLoopCallback(
XPLMFlightLoop_f inFlightLoop,
void * inRefcon);
This routine unregisters your flight loop callback. Do NOT call it from your flight loop callback. Once your flight loop callback is unregistered, it will not be called again.
Only use this on flight loops registered via XPLMRegisterFlightLoopCallback.