1. 8524. Which is considered a good practice concerning the inspection of heating and exhaust systems of aircraft utiliz ing a jacket around the engine exhaust as a heat source? A. Supplement physical inspections with periodic operational carbon monoxide detection tests. B. All exhaust system components should be removed periodically, and their condition determined by the magnetic-particle inspection method. C. All exhaust system components should be removed and replaced at each 100-hour inspection period.