Willmann went to United States in August 1977 for the Ninety-Fifty Annual Supreme Council Convention which took place from August 14 to 17 at Indianapolis in Indiana. Willmann led the Philippine delegation with Bro. Nicanor Y. Fuentes and Bro Concelio B. Cagurangan. Willmann later went to
New York presumedly to pay a visit to his sisters, Ruth, and Agnes Franciscan nun living in
Flower Hill, and his nephew James and niece Mary Ruth. The priest was prone to falls because of his weak limbs and had a fall while he was in New York, and needed a hip-bone surgery. The priest was initially confined at
St. Francis Hospital in Flower Hill. He was later transferred to
Murray-Weigel Hall, a Jesuit infirmary at
Fordham University in
Fordham,
the Bronx,
New York City on September 8, 1977. Willmann was later discharged and stayed at the Jesuit House at
Fordham. Willmann, died on September 14, 1977, due to cardiac arrest. Willmann's remains were interred at the Jesuit Cemetery in
Novaliches,
Quezon City, Philippines. ==Legacy==