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Detail Steps/Work Items Key Items/References
WARNING: DO NOT STAND WITHIN THE DANGER AREA OF THE PROPELLER. IF THE ENGINE STARTS, THE PROPELLER CAN CAUSE DEATH OR INJURY TO PERSONS. WARNING: YOU MUST MAKE SURE THAT THE ENGINE IS SAFE BEFORE YOU DO WORK ON THE ENGINE CONTROLS. IF THE PROPELLER TURNS IT CAN CAUSE INJURY TO PERSONS.
(1) Make sure that the engine is safe: S Set the ELECTRIC MASTER key switch to OFF. S Set the ENGINE MASTER switch to OFF. S Set the power lever to IDLE.
(2) Remove the engine cowlings. Refer to Section 71-11.
(3) Disconnect the airplane main battery. Refer to Section 24-34.
(4) Remove the alternate air valve. Refer to Paragraph 3.
(5) Remove the firewall feed-thru from the engine side of the firewall: S Remove the firewall sealant from the feed-thru. S Drill out the two rivets which hold the shields to the firewall. S Remove the shields. S Pull the 2 parts of the feed-thru clear of the firewall. Keep the 2 parts of the feed-thru.
(6) Disconnect the control cable at the alternate air lever in the cockpit. On the pilot's side under the instrument panel.
(7) Move the control cable clear of the airplane.
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Detail Steps/Work Items Key Items/References
(1) Move the alternate air control cable in position in the airplane. Through the hole in the firewall and the slot in the floor area near the alternate air lever.
(2) Connect the alternate air control cable to the alternate air lever in the cockpit.
(3) Install the feed-thru to the engine side of the firewall with firewall sealant: S Put the 2 parts of the feed-thru round the control cable. S Push the feed-thru in the firewall. S Put the 2 shields in position over the feed-thru. Apply firewall sealant. S Install 2 pop-rivets to attach the shields to the firewall. Use PR 812 (MIL-S-38249 Type 1) Firewall Sealant.
(4) Install the alternate air valve. Refer to Paragraph 3.
(5) Adjust the alternate air control cable. Refer to Paragraph 5.
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DA 40 Series
Detail Steps/Work Items Key Items/References
WARNING: DO NOT STAND WITHIN THE DANGER AREA OF THE PROPELLER. IF THE ENGINE STARTS, THE PROPELLER CAN CAUSE DEATH OR INJURY TO PERSONS. WARNING: YOU MUST MAKE SURE THAT THE ENGINE IS SAFE BEFORE YOU DO WORK ON THE ENGINE CONTROLS. IF THE PROPELLER TURNS IT CAN CAUSE INJURY TO PERSONS.
(1) Make sure that the engine is safe: S Set the ELECTRIC MASTER key switch to OFF. S Set the ENGINE MASTER switch to OFF. S Set the power lever to IDLE.
(2) Remove the engine cowlings. Refer to Section 71-11.
(3) Disconnect the airplane main battery. Refer to Section 24-34.
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