If the APU is inoperative and a Huffer cart is used to start the right engine, what procedure should be used to start the left engine?

• A. Normal engine start procedure.
• B. Cross-bleed start is mandatory.
• C. Use APU bleed start only.
• D. Do not attempt to start the left engine.

Answer: (A)

Starting one engine with external air does not force you to start the other engine via bleed air from that engine. You can and should use the left engine’s normal start procedure, provided you have the necessary power to the starter. With the APU inoperative, you can’t rely on APU bleed, but that doesn’t prevent a normal, independent start for the second engine. Cross-bleed start would only be necessary if you needed bleed air from the other engine or APU to start it and you didn’t have an independent start source; here, the left engine is ready for its standard start.