According to JAR-OPS 1, a windshield wiper or equivalent means to maintain a clear portion of the windshield during precipitation is required at each pilot station to operate an aeroplane with a:
Domanda 100, Operational Procedures - ATPL - Airline Transport Pilot license
| Maximum certificated take-off mass is greater than 15,000 kg |
| Maximum certificated take-off mass is greater than 5,700 kg |
| Maximum approved passenger seating configuration is greater than 30 after January 1st, 2000 |
| Maximum approved passenger seating configuration is greater than 9 |
