if (e->intro_date <= _date) {

		e->age = (aging_date - e->intro_date) >> 5;

		e->company_avail = (CompanyMask)-1;

		e->flags |= ENGINE_AVAILABLE;

	}

	e->reliability_start = GB(r, 16, 14) + 0x7AE0;

	r = Random();

	e->reliability_max   = GB(r,  0, 14) + 0xBFFF;

	e->reliability_final = GB(r, 16, 14) + 0x3FFF;

	r = Random();

	e->duration_phase_1 = GB(r, 0, 5) + 7;

	e->duration_phase_2 = GB(r, 5, 4) + ei->base_life * 12 - 96;

	e->duration_phase_3 = GB(r, 9, 7) + 120;

	e->reliability_spd_dec = ei->decay_speed << 2;

	CalcEngineReliability(e);

	/* prevent certain engines from ever appearing. */

	if (!HasBit(ei->climates, _settings_game.game_creation.landscape)) {

		e->flags |= ENGINE_AVAILABLE;

		e->company_avail = 0;