Chapter 7.90 AIRCRAFT OPERATION This chapter is included in your selections. Sections: 7.90.010 Engine maintenance tests. 7.90.020 Certification. 7.90.030 Equipment. 7.90.040 Runway and taxiway use. 7.90.050 Helicopters. 7.90.060 Aircraft repair. 7.90.070 Boundary crossing. 7.90.080 Noise abatement. 7.90.090 Aircraft deicing.