| Clue | Source | Date |
|---|---|---|
| Warning on an airplane wing | New York Times | 13 Oct 2020 |
| Warning on an airplane wing | Premier Sunday | 01 Dec 2019 |
| Airplane wing warning | Universal | 02 Feb 2019 |
| Airplane wing warning | ||
| Caution on an airplane wing | New York Times | 16 Sep 2018 |
| Caution on an airplane wing | ||
| Oft-ignored ladder warning | ||
| Words on an airplane wing decal | ||
| Jet wing warning | ||
| Warning on an airplane wing | ||
| Warning on an airplane wing |