Can you clarify, your post (statement), please ?
VH-JTE > DB search shows 2 airframes (see attached screenshot). You can click on either reg link, then scroll page up/down to see details of the airframe, that interest you...
Your RJ100 is listed in DB;
Model: Avro 146-RJ100 (C/N): E3274 and MS-880B Rallye Club (C/N): 5195
The RJ100 is the fouth use of registration mark VH-JTE and it's current.
the MS880 rallye club's previous regs VH-JTE, VH-JKB, VH-DEF, of which VH-DEF is current, for it.
VH-JTE was also used by two other airframes;
Evektor EV-97 SportStar Plus (not in DB)
and a SOCATA TB-9 Tampico (not in DB)
John