Hartzell CD15K - 8.2 100 HOUR;ANNUAL HEATER INSPECTION AND OPERATIONAL CHECK; 8.2.1 Perform the following checks at the end of 100 hours of heater operation or annual inspection:; 8.3 250 HOUR; 2 YEAR HEATER INSPECTION

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MM10001
Dated 1/1/08
Rev L dated 5/21/15
8.2 100 HOUR/ANNUAL HEATER INSPECTION AND OPERATIONAL CHECK
NOTE: This inspection must be recorded in accordance with FAR43.9 and maintained as required by
FAR 91.417.
8.2.1 Perform the following checks at the end of 100 hours of heater operation or annual
inspection:
 Check that the combustion air and ventilating air inlets are free of any obstructions
or damage of any kind.
 Check that the exhaust outlet is free of obstructions or constrictions, is secure, is free
of excessive carbon formations, abnormal stains and/or discoloration, which would
indicate poor heater operation.
 Check that the fuel drain lines are free of obstructions, constrictions and damage.
 Check the entire length of all fuel lines for security and any visible signs of leakage.
Be sure all joints and shrouds are secure and in good condition.
 Check that the heater wiring has no loose connections, cracked or broken wires, or
frayed insulation and is secure at the attachment points.
 Check the ignition system for security at the spark plug, making sure there is no
evidence of burning or discoloration of the lead.
 Perform the Preflight/operational check to assure correct heater performance.
8.3 250 HOUR/ 2 YEAR HEATER INSPECTION
NOTE: Once the combustion heater has reached 1000 hrs. time in service, pressure decay tests are
required every 250 hours or four years (whichever comes first).
 Replace the heater fuel filter by installing filter kit CD21346
 Verify the torque of the ignition lead both at the igniter plug (15-20 ft. lbs.) and ignition unit
(12-15 ft. lbs.).
 Complete 100hr/Annual inspection and operational check.