AD 79-19-12

79-19-12 CESSNA: Amendment 39-3574. Applies to Model 441 (Serial Numbers 441-0001 through 441-0109) airplanes.

COMPLIANCE: Required as indicated unless already accomplished.

To preclude an unplanned engine stoppage, accomplish the following:

A) Prior to the next flight

1) Rewire the engine control wiring in accordance with the instructions provided by Cessna Propjet Service Information Letter PJ79-27, dated July 30, 1979.

2) Temporarily insert the following procedures, which supersede the existing procedures of the same subject in Section 4 of Revision 6 of the Pilot's Operating Handbook and FAA Approved Airplane Flight Manual, and operate the airplane in accordance with these insertions:

GROUND OPERATIONS ENGINE CLEARING PROCEDURE

Natural draining of fuel and fuel vapors from the engine will occur by allowing the engine to remain static for a minimum of three minutes.

If a motoring procedure is preferred:

1. Battery Switch - ON.2. Engine Stop Button - PUSH momentarily to close electric fuel shutoff.

3. Ignition Override Switch - CHECK OFF.

4. Propeller - CLEAR and on start locks.

CAUTION: Use of the Starter Motor Switch prior to pushing the engine stop button will result in unwanted fuel in the engine and a possible engine start-up. Ensure that fuel and ignition are shut off prior to activating the Starter Motor Switch.

5. Starter Motor Switch - LIFT cover guard and hold switch in desired position until engine reaches 15% RPM.

6. Battery Switch - OFF.

NOTE: Do not attempt a restart until EGT is less than 200 degrees C. Do not exceed starter duty cycle presented in Section 2.

INFLIGHT ENGINE CLEARING PROCEDURE

NOTE: The STARTER MOTOR switch is deactivated in flight. Engine rotation is accomplished through use of the unfeathering pump switch.

Natural draining of fuel and fuel vapors from the engine will occur by allowing the engine to remain static for a minimum of 30 seconds.

1. Engine Stop Button - PUSH momentarily to close electric fuel shutoff.

2. Ignition Override Switch - CHECK OFF.

3. Condition Lever - TAKEOFF, CLIMB AND LANDING.

CAUTION: Use of the Unfeathering Pump Switch prior to pushing the engine stop button will result in unwanted fuel in the engine and a possible engine start-up. Ensure that fuel and ignition are shut off prior to activating the Unfeathering Pump Switch.

Do not allow the engine to continuously NTS between 18% and 28% RPM.

4. Unfeathering Pump Switch - ACTUATE and hold until 10% to 15% RPM is achieved.

5. Condition Lever - EMER. SHUTOFF.

NOTE: Do not attempt a restart until EGT is less than 200 degrees C.

NOTE: This Airworthiness Directive, or a duplicate thereof may be used as a temporary amendment to the Pilot's Operating Handbook and FAA Approved Airplane Flight Manual and carried in the aircraft as a part of the Pilot's Operating Handbook and FAA Approved Airplane Flight Manual until replaced by a permanent copy of Revision 7, dated August 7, 1979, to the Pilot's Operating Handbook and FAA Approved Airplane Flight Manual, which is attached to Cessna Propjet Service Information Letter PJ79-24, dated August 7, 1979.

B) Any equivalent method of compliance with this AD must be approved by the Chief, Engineering and Manufacturing Branch, FAA Central Region.

This amendment becomes effective October 1, 1979.