When will air conditioning not be available in the TH-73?

• A. During engine start-up
• B. If the primary generator fails
• C. If the auxiliary generator is the only power source
• D. When the rotor blades are not spinning

Answer: (C)

Air conditioning in the TH-73 is dependent on the availability of electrical power from its generators. The auxiliary generator serves as a backup power source, but it does not have the capacity to support the air conditioning system when it is the only power source available. This limitation means that if the primary generator fails and the auxiliary generator is the only source providing electricity, the system is unable to operate the air conditioning unit effectively due to insufficient power capacity. Understanding the reliance on generator systems helps clarify why air conditioning would not be functional in this context.