Piper PA-31 occurrences (851–900 of 1,340)
- 1985-12-16 — N4445K (incident)
- 1985-12-10 — Tri Star Transportation — N4NP (incident)
- 1985-12-05 — South Central Air, Inc. — N492SC (incident)
- 1985-12-03 — Precision Holding — C-GZTD (1 fatal)
- 1985-12-01 — Zilfi Investments Company — N9250Y (incident)
- 1985-11-26 — Northland Air Cargo — N537NB (incident)
- 1985-11-20 — OxAero - Oxford Aerocharter — G-BHIZ (3 fatal)
- 1985-10-23 — Transportes Aéreos Tropicales - TAT Colombia — HK-1590 (5 fatal)
- 1985-10-07 — N9135Y (incident)
- 1985-09-17 — N62994 (incident)
- 1985-09-04 — Michael J. Russo — N27902 (incident)
- 1985-08-27 — Private Bolivia — CP-1992 (2 fatal)
- 1985-08-23 — Hubert Van Pittman — N600CM (5 fatal)
- 1985-08-21 — California Air Charter - Cal Air Charter — N7497L (incident)
- 1985-08-15 — Viking Aviation — N27476 (incident)
- 1985-07-21 — Kenting Earth Sciences — C-GNID (3 fatal)
- 1985-07-17 — Precision Holding — C-GKQJ (1 fatal)
- 1985-06-16 — N66887 (incident)
- 1985-06-09 — N7697L (incident)
- 1985-06-05 — N777YR (incident)
- 1985-05-17 — Sair Aviation — N3548V (incident)
- 1985-05-17 — Cumberland Airlines — N66892 (incident)
- 1985-05-02 — Readi-air — N902BH (incident)
- 1985-04-22 — N3550N (incident)
- 1985-04-13 — Oxley Airlines — VH-AOX (incident)
- 1985-04-06 — Nantucket Aircrft Main.,inc. — N68DD (hull loss)
- 1985-03-28 — Charles F. Dimino — N3517W (3 fatal)
- 1985-03-25 — Eric Schaffer — N23L (incident)
- 1985-02-25 — WTS Inc. — N404RS (3 fatal)
- 1985-02-22 — Norment Industries — N100RN (2 fatal)
- 1985-02-14 — PenAir - Peninsula Airways - Alaska Airlines Commuter — N63719 (1 fatal)
- 1985-02-08 — N27743 (incident)
- 1985-02-06 — N3528U (incident)
- 1985-02-01 — Air Trends — N27522 (4 fatal)
- 1985-01-27 — Bering Air — N4112D (incident)
- 1985-01-17 — Southern Express Airways — N70CZ (incident)
- 1984-12-29 — Ready Air — N801BR (incident)
- 1984-12-13 — Southern Express Airways,inc. — N40790 (incident)
- 1984-12-12 — France Europe Avia Jet — F-GDPJ (7 fatal)
- 1984-12-11 — Richards Aviation — N9011Y (2 fatal)
- 1984-11-15 — Texas National Airlines, Inc. — N333TB (incident)
- 1984-11-04 — Private United States of America (1 fatal)
- 1984-10-19 — Wapiti Aviation — C-GXUC (6 fatal)
- 1984-10-17 — G. W. Martin Veneer Ltd — C-GAPT (3 fatal)
- 1984-09-28 — Aero Services - USA — N7205L (1 fatal)
- 1984-09-28 — Ronald Kaldor — N74982 (1 fatal)
- 1984-09-24 — Pee Dee Air Express, Inc — N9193Y (hull loss)
- 1984-09-24 — Mecon Taxi Aéreo — PT-BKB (8 fatal)
- 1984-09-09 — Georgetown Aircraft — N29RH (incident)
- 1984-09-06 — Jeffrey A. Miller — N4499B (incident)