Piper PA-31 occurrences (501–550 of 1,340)
- 1999-12-06 — Flightline Charter Services — ZS-OJY (10 fatal)
- 1999-12-01 — Schuybroek Aviation — N38RG (hull loss)
- 1999-11-15 — N4UE (incident)
- 1999-10-16 — N220CS (incident)
- 1999-10-14 — Ameriflight — N1024B (1 fatal)
- 1999-10-11 — N74923 (incident)
- 1999-09-30 — CGHOL (incident)
- 1999-09-27 — Merline Nix — N100EE (1 fatal)
- 1999-09-25 — Big Island Air — N411WL (10 fatal)
- 1999-09-21 — Baltimore Air Transport, Inc. — N27343 (2 fatal)
- 1999-09-09 — Webs Planes — N6579L (hull loss)
- 1999-08-29 — Sowind Air — C-GHMK (hull loss)
- 1999-07-26 — N97MA (incident)
- 1999-07-15 — Air Care (South West) — G-NAVO (2 fatal)
- 1999-07-03 — Salmon Air, Inc. — N3528Y (incident)
- 1999-07-01 — Brian Hawley — N602RM (1 fatal)
- 1999-06-11 — Larry's Flying Service Inc. — N41078 (1 fatal)
- 1999-06-07 — Between Province of Manitoba (incident)
- 1999-04-15 — N57AS (incident)
- 1999-04-14 — Tokyo International Trading America — N141CM (incident)
- 1999-04-11 — N59985 (incident)
- 1999-04-05 — G-OPRA (incident)
- 1999-03-24 — N812TB (incident)
- 1999-02-23 — Aero Lloyd (Chile) — CC-CRV (hull loss)
- 1999-01-05 — N6GR (incident)
- 1998-12-16 — Transportes Aéreos de El Salvador — YS-14C (2 fatal)
- 1998-12-12 — Private Ghanaian — 9G-BCM (hull loss)
- 1998-12-04 — L & W Flying Service — N59902 (1 fatal)
- 1998-12-03 — Cape Smythe Air Service — N3542H (incident)
- 1998-10-30 — Busscar — PTWHI (3 fatal)
- 1998-10-28 — Sundance Air — N35533 (1 fatal)
- 1998-10-21 — Boma Helicopters — ZS-NHM (hull loss)
- 1998-10-08 — Castle Aviation — N3543A (incident)
- 1998-09-25 — Southern Mechanical Plumbing — N684AE (incident)
- 1998-09-18 — Private Costarican — TI-AVP (2 fatal)
- 1998-09-17 — N4112D (incident)
- 1998-09-07 — Kenneth Arndt — N4072A (incident)
- 1998-08-18 — N66906 (incident)
- 1998-08-12 — N3527U (incident)
- 1998-08-08 — Air Bridge, Inc. — N27196 (incident)
- 1998-08-08 — Gray Leasing — N6JM (3 fatal)
- 1998-07-22 — Aéro 3000 (incident)
- 1998-07-17 — Jon Speisman — N7578L (1 fatal)
- 1998-06-12 — Rif Air — CN-TFP (1 fatal)
- 1998-05-20 — Bahia Táxi Aéreo - BATA — PTENP (3 fatal)
- 1998-05-19 — Bruce L. Erickson — N121BE (2 fatal)
- 1998-05-14 — Avionair — C-GUVK (incident)
- 1998-04-17 — Shadow Forest Services Ltd. (incident)
- 1998-03-22 — Arapahoe Aviation Inc — N715PM (incident)
- 1998-03-05 — Airpac Airlines — N257NW (1 fatal)