Hartzell CD15K - 8.7 HEATER DISABLING

2900 Selma Highway, Montgomery AL 36108 USA
PH: +1.334.386.5400 (option 2) FAX: +1.334.386.5450 WEB: www.hartzell.aero
Page | 23
MM10001
Dated 1/1/08
Rev L dated 5/21/15
8.7 HEATER DISABLING
In the event the heater is determined to be unsafe for use it must be disabled until repairs can be
made. To properly disable the heater complete the following:
 Disengage the heater circuit breaker. Disable the heater by disconnecting the electrical wires
at the heater and ensure that the electrical connections are properly insulated/secured to
eliminate the possibility of electrical spark or structural damage.
 Disconnect and cap/plug off fuel to the heater as close to fuel source as possible
 Inspect and test to ensure that the cabin heater is disabled and that there are no fuel leaks or
other aircraft systems affected by this action.
 Placard with date near heater control “HEATER DISABLED XX/XX/XX”