The oldest airframes involved in accidents, based on the aviation-safety.net database are:
Boeing 767-375ER C-GHOZ of Air Canada: on 12 Sep 2017 it had 120692 hours and was subsequently repaired
Boeing 747-436 G-BNLL (BA) had 110578 hours on 22 Dec 2013 when it ran into a building at FAOR; broken up after that
Boeing 747-209F N704CK of Kalitta overran runway at Brussels on 25 May 2008 at 108560 hours
Two airframes in the ASN database had over 100.000 cycles:
DHC-6 9M-MDM of MASwings: 108882 cycles in 30 years in service
DC-9-14 XA-BCS of Aero California: 102000 cycles in 37 years in service