Terry “T-Bird” L. Duncan, 60, of Slippery Rock passed away on Tuesday, June 9, 2026. She was born in Oil City, PA on May 24, 1966, to the late John and Edna (Harrison) Fletcher.
Terry was a digital creator and computer tech. She enjoyed working on computers, gardening, talking to friends and watching murder mysteries and biographies on TV. Terry was a Pool playing champ and loved to spend time with her grandchildren.
She was known for being a great listener, brave, strong, willful and stubborn. Her radiant smile and bright personality could make a friend out of a stranger. She had a voice and was not afraid to use it.
Mother of Amberleigh, Joseph III and Johnnie Duncan; sister of Brenda Fletcher and Darla Fletcher – Winger; grandmother of Olivia Herndan, Jonathan, Emma and Sefton Duncan.
All arrangements were made through SPENCER D. GEIBEL FUNERAL HOME & CREMATION SERVICES, 140 NEW CASTLE RD. BUTLER, PA 16001. WWW.SPENCERDGEIBEL.COM.
A Celebration of Life will be held on Friday, July 3, 2026, a location will be determined at a later date.