C421 occurrences (551–600 of 618)
- 1974-11-17 — N99NE (incident)
- 1974-10-31 — N396DB (incident)
- 1974-10-31 — N8007Q (incident)
- 1974-10-24 — N5976M (incident)
- 1974-10-03 — N22MT (incident)
- 1974-09-13 — N3160K (incident)
- 1974-06-14 — N4572L (incident)
- 1974-04-26 — N5962M (incident)
- 1974-03-29 — Electro-Enterprises — N3139K (5 fatal)
- 1974-02-12 — N5998M (incident)
- 1974-01-27 — N3126K (incident)
- 1973-12-29 — N421AT (incident)
- 1973-11-21 — Landis Sales — N2217Q (2 fatal)
- 1973-11-14 — King Tire Company — N550T (5 fatal)
- 1973-10-09 — N1538T (incident)
- 1973-05-21 — N354WP (incident)
- 1973-03-29 — Aero Consultant Service — HB-LGP (7 fatal)
- 1973-02-19 — The Falk Corp. — N1536T (4 fatal)
- 1973-02-19 — N421MC (incident)
- 1973-01-16 — Prescott Valley Flying Service — N42J (3 fatal)
- 1972-12-16 — Private United States of America — N121X (3 fatal)
- 1972-10-29 — Private United States of America — N5959M (2 fatal)
- 1972-10-07 — Nasco Leasing Company — N424WP (hull loss)
- 1972-08-18 — N3140K (incident)
- 1972-08-07 — Jerrico — N123QF (5 fatal)
- 1972-07-28 — N2983Q (incident)
- 1972-07-12 — N4048L (incident)
- 1972-07-08 — Western Construction & Lumber Company — CF-XWI (6 fatal)
- 1972-07-03 — Private United States of America — N5977M (1 fatal)
- 1972-05-26 — N8002Q (incident)
- 1972-03-15 — Picoma Industries — N3390Q (2 fatal)
- 1972-03-02 — Winer Sportswear — N456CB (2 fatal)
- 1972-02-23 — N8084Q (incident)
- 1972-02-21 — Smith International — N4087L (hull loss)
- 1972-02-20 — N2217Q (incident)
- 1972-02-07 — HB-LFQ (incident)
- 1972-01-12 — N989MC (incident)
- 1971-12-07 — N4018L (incident)
- 1971-12-03 — N2224Q (incident)
- 1971-10-28 — N3178K (incident)
- 1971-08-26 — N2243Q (incident)
- 1971-08-20 — Robert C. Haase — N3198K (2 fatal)
- 1971-07-05 — N803HK (incident)
- 1971-06-22 — N6162Q (incident)
- 1971-06-17 — N421A (incident)
- 1971-05-05 — N4073L (incident)
- 1971-05-02 — Brookside-Pratt Mining Company — N3194K (4 fatal)
- 1971-04-11 — HB-LDV (incident)
- 1971-03-04 — N8006Q (incident)
- 1971-02-06 — N8025Q (incident)