(j ~ichita~hraft Certification Office Federal Aviation Administration

, 6- AIR PLAMS SERVICES, CORP WELLrfiCTON ALRPORT ItTLLINGTON, U.67 152 SUPPLEhENTXL AIRPLANE FLIGHT MAMJAL C180 Serial Numhers: 18051446 through I8052103 STC SA0078AT F.A.A. APPROVED Reg. No. Ser. No. FOR CESSNA I&OH, Serial No. 18051446 through 18052103 This Supplemental Airplane Fjight Manual (AFM) applies to the airplanes noted above when a Continental Model 10-550-D engine and one of the following propellers and associated spinner is installed on Cessna 180 aircraft in accordance with Supplemental Type Certificate (STC) No. SA00785AT. The information herein supplements or supersedes the information presented in the flight manual and on placards in the airplane. For Limitations, Procedures and Performance information not contained in the Supplemental AFM, consult the flight manual or placards in the airplane. 1 (j ~ichita~hraft Certification Office Federal Aviation Administration Dated: 51" 110 I

F.A.A. APPROVED FOR CESSNA 180H, Serial No. 18051446 through 18052103 Reg. No. Ser. No. This Supplemental Airplane Flight Manual (AFM) applies to the airplanes noted above when a Continental Model IO-550-D engine and one of the following propellers and associated spinner is installed on Cessna 180 aircraft in accordance with Supplemental Type Certificate (STC) No. SA00785AT. Hartzell PHC-C3YF-1RF/F8468A ( )-6R Hartzell PHC-C3YF-1RF/F7691 ( ) McCauley D3A34C401/90DFA-10 The information herein supplements or supersedes the information presented in the flight manual and on placards in the airplane. For Limitations, Procedures and Performance information not contained in the Supplemental AFM, consult the flight manual or placards in the airplane. FAA APPROVED: Ronald K. Rathgeber, Manager Wichita Aircraft Certification Office Federal Aviation Administration Dated: DOCUMENT NUMBER C180-550-APSFM3 Page 1 of 21

,,, A!R PLAINS SERVICES, CORP STC SAO0785AT FAA APPROVED SUPPLEMENTAL FLIGHT MANUAL LOG OF REVISIONS -- ~ev.ny r pages-!1 Description Date Orig All i For the indicated C180 aircraft 05121101 G. M.Baker modified taw Air Plains Services, Corp. Master Drawing List Document I I 1 I01GDL-APS.! Rev I 1 2,8,40,12,14, I Added fuel shut off valve, I June23,2005 Added placard, Revised footer for document number i *For Manager, Wichita Aircraft Certification Office DOCUMENT NUMBER C180-550-APSFM3 Page 2 of '1 Rev 1, Dated: June 28,2005

INDEX Description Page SECTION I. OPERATING CHECK LIST...4 SECTION II. DESCRIPTION AND OPERATING DETAILS...8 SECTION III. OPERATING LIMITATIONS...17 SECTION IV. CARE OF THE AIRPLANE...21 SECTION V. OPERATIONAL DATA...21 SECTION VI. OPTIONAL SYSTEMS...21 DOCUMENT NUMBER C180-550-APSFM3 Page 3 of 21

SECTION I. OPERATING CHECK LIST Make the following changes to the Check List in your Cessna Owner s Manual. Starting Engine - Replace with list below. 1. Throttle OPEN half way. 2. Propeller -- HIGH RPM. 3. Mixture -- RICH 4. Propeller Area CLEAR 5. Master Switch ON 6. Auxiliary Fuel Pump ON until positive fuel flow, then OFF. 7. Throttle OPEN ½ Inch. 8. Ignition Switch START, Release on engine start 9. Throttle - RETARD slowly to 1000 RPM or less. Note The engine should start in two to three revolutions. If it does not continue running, start again at step 4 above. If the engine still does not start, leave auxiliary fuel pump switch off, set mixture to idle cut-off, open throttle, and crank until engine fires or for approximately 15 seconds. If still unsuccessful, start again using the normal starting procedure after allowing the starter motor to cool. NOTE After starting, check for oil pressure within 30 seconds in normal temperatures and 60 seconds in cold temperatures. If no indication appears, shut off engine and investigate. 10. Throttle -- ADJUST for 1000 RPM or less. 11. Oil Pressure -- CHECK. (10 PSI min. within 30 seconds at moderate temperatures). 12. Starter -- CHECK DISENGAGED (if starter were to remain engaged, ammeter would indicate full scale charge with engine running at 1000 RPM). 13. Avionics -- ON. 14. Navigation Lights and Flashing Beacon -- ON as required. Before Takeoff - Add before runup. Auxiliary Fuel Pump -- OFF. SECTION I. OPERATING CHECK LIST, (Cont d) DOCUMENT NUMBER C180-550-APSFM3 Page 4 of 21

Climb: Cruising: Full throttle and 2700 RPM Max take-off 25, 2500 RPM Cruise climb. Power 15 to 25 Hg, 2200 to 2500 RPM. Let-Down: - Add Auxiliary Fuel Pump -- OFF. Before Landing - Add Auxiliary Fuel Pump -- OFF. AMPLIFIED PROCEDURES Starting Engine Proper fuel management and throttle adjustments are the determining factors in securing an easy start from your continuous-flow fuel-injection engine. The procedure outlined in the checklist should be followed closely as it is effective under nearly all operating conditions, including hot and cold weather conditions. Slight variations from this procedure may be necessary at times to compensate for extreme conditions. Conventional full rich mixture and high RPM propeller settings are used for starting; the throttle, however, should be fully closed initially. When ready to start, advance the throttle half way, place the auxiliary fuel pump switch in the PRIME position until positive fuel flow is observed on the fuel flow indicator. Then promptly turn off the auxiliary fuel pump and return the throttle to the 1/2 inch open position. Rotate the ignition switch to the START position. Return the ignition switch to the both position when the engine starts and slowly retard the throttle to 1000 RPM or less. Engine starting in hot weather or with a hot engine is sometimes hampered by vapor formation in the fuel lines. To purge the vapor, move the mixture control to full rich, open the throttle 1 1/2 inches, and prime with the auxiliary fuel pump switch in the PRIME position until the fuel flow indicator reads 8-10 gal/hr. Then turn off the fuel pump switch and engage the starter. As the flooded mixture becomes progressively leaner, reaching a combustible mixture, the engine will start. If the engine tends to die, DOCUMENT NUMBER C180-550-APSFM3 Page 5 of 21

SECTION I. OPERATING CHECK LIST, (Cont d) turn the auxiliary fuel pump switch momentarily to ON at appropriate intervals until the vapor is fully cleared and the engine runs smoothly. If prolonged cranking is necessary, allow the starter motor to cool at frequent intervals, since excessive heat may damage the armature. If oil pressure is not indicated within 30 seconds in normal temperatures and 60 seconds in cold temperatures, shut off engine and investigate the cause. Takeoff For maximum engine power, the mixture should be adjusted during the initial take off roll to the fuel flow corresponding to the field elevation. The power increase is significant above 3000 feet and this procedure always should be employed for field elevations greater than 5000 feet above sea level. Maximum Performance Climb The mixture should be leaned as shown by the 2700 RPM line on the fuel flow placard, located on the instrument panel or leaned for maximum power and smooth operation before takeoff. Engine Roughness During Climb or Cruise If engine roughness, fuel flow fluctuations or low fuel occur, turn Auxiliary Fuel Pump ON and manually lean to the following fuel flow schedule: MIN. FUEL FLOWS AT FULL THROTTLE RPM SL 4000 8000 12000 2700 24 GPH 22 GPH 20 GPH 18 GPH Manual leaning fuel flows for full throttle and 2500 RPM are 1 gph less than those shown on the schedule. DOCUMENT NUMBER C180-550-APSFM3 Page 6 of 21

SECTION I. OPERATING CHECK LIST, (Cont d) NOTE This schedule provides mid-range Full Rich Mixture; further adjustment of the mixture may be necessary to obtain smooth engine operation Leaning With A Cessna Economy Mixture Indicator (EGT) Exhaust gas temperature (EGT) as shown on the optional Cessna Economy Mixture Indicator may be used as an aid for mixture leaning in cruising flight at 75% power or less. To adjust the mixture, using this indicator, lean to establish the peak EGT as a reference point and then enrichen the mixture by a desired increment based on data in the table below. MIXTURE DESCRIPTION BEST POWER (Maximum Speed) RECOMMENDED LEAN (75% Power or Less) BEST ECONOMY (65% Power or Less) EGT Table EXHAUST GAS TEMPERATURE 100 0 F Rich of Peak EGT 50 o F Rich of Peak EGT Peak EGT Continuous operation at peak EGT is authorized only at 65% power or less. This best economy mixture setting results in approximately 6% greater range accompanied by approximately 3 knots decrease in speed. Note Operation on the lean side of peak EGT is not approved. When leaning the mixture, if a distinct peak is not obtained, use the corresponding maximum EGT as a reference point for enrichening the mixture to the desired cruise setting. Any change in altitude or power will require a recheck of the EGT indication. DOCUMENT NUMBER C180-550-APSFM3 Page 7 of 21

SECTION II. DESCRIPTION AND OPERATING DETAILS GENERAL NOTES. Coordinate your Owner s Manual with this supplement. This supplement supersedes the information in your Owner s Manual where the text is discussing engine operation. Limitations -- This STC DOES NOT CHANGE ANY AIRSPEED OR WEIGHT LIMITS. Cooling -- With the higher horsepower IO-550-D engine, additional care must be taken to ensure proper cooling After maintenance, ensure the proper reinstallation of all baffling and check to see that soft baffle seals tightly seal up gaps. During preflight walk around, check for obstructions at the cooling air intake locations and oil cooler face. Also check for bird nest debris or other obstructions inside the cowling. On hot days, minimize taxi and runup time. During climb, maintain 95-105 KIAS, 100-120 MPH after obstacle clearance. Mixture Management -- The mixture is set to specific fuel flows with the vernier or by EGT as described in the Amplified Check List. Throughout your Owner s Manual the following deletions and substitutions apply: Carburetor... Deleted (Engine has injection system) Carburetor Heat... Substitute - Alternate Air Carburetor Air Filter... Substitute -- Induction Air Filter Engine Primer... Substitute -- Manual Primer (Optional) Mixture Control... Substitute -- Mixture Control (With Vernier Adjustment) Full Throttle, xxxx RPM... Substitute -- Full Throttle, 2700 RPM Oil Filter Screen... Engine is equipped with disposable spin-on filter or oil screen Fuel Selector Off... Substitute Fuel Shut off Control OFF (OUT) Fuel Selector On... Substitute Fuel Shut off Control On (IN) DOCUMENT NUMBER C180-550-APSFM3 Page 8 of 21 Rev 1, Dated: June 28 2005

SECTION II. DESCRIPTION AND OPERATING DETAILS, (Cont d) ENGINE Number of Engines: 1 Engine Manufacturer: Teledyne Continental Engine Model Number: IO-550-D Engine Type: Normally-aspirated, direct-drive, air-cooled, horizontally opposed, fuel-injected, six-cylinder engine with 550 cu. in. displacement. Horsepower Rating and Engine Speed: Maximum continuous power 300 rated BHP at 2700 RPM. PROPELLER Propeller Manufacturer: Hartzell Propeller Model Number: PHC-C3YF-1RF/F8468A ( )-6R Number of Blades: 3 Propeller Diameter: Maximum: 80 inches Minimum: 77 inches Propeller Type: Constant speed and hydraulically actuated with a low pitch setting of 13.0 +-0.2 and a high pitch setting of 30-32 (30 inch station). Propeller Manufacturer: Hartzell Propeller Model Number: PHC-C3YF-1RF/F7691 ( ) Number of Blades: 3 Propeller Diameter: Maximum: 78 inches Minimum: 77 inches Propeller Type: Constant speed and hydraulically actuated with a low pitch setting of 14.5 + 0.2 and a high pitch setting of 30-32 (30 inch station). Propeller Manufacturer: McCauley Propeller Model Number: D3A34C401/90DFA-10 Number of Blades: 3 Propeller Diameter: Maximum: 80 inches Minimum: 78 inches Propeller Type: Constant speed and hydraulically actuated with a low pitch setting of 11.2 + 0.2 and a high pitch setting of 28.5 +.5 (30 inch station). DOCUMENT NUMBER C180-550-APSFM3 Page 9 of 21

SECTION II. DESCRIPTION AND OPERATING DETAILS, (Cont d) FUEL Approved Fuel Grades (and Colors): 100LL Grade Aviation Fuel (Blue). 100 (Formerly 100/130) Grade Aviation Fuel (Green). OIL NOTE Isopropyl alcohol and ethylene glycol monomethyl ether may be added to the fuel supply. Additive concentrations shall not exceed 1% for isopropyl alcohol or.15% for ethylene glycol monomethyl ether. To ensure maximum fuel capacity when refueling and minimize cross-feeding when parked on a sloping surface, place the fuel selector value in the the RIGHT or LEFT position. Oil Specification: The engine was delivered from the factory with corrosion-preventive aircraft engine oil. This oil should be drained after the first 25 hours of operation. MIL-L-6082 Aviation Grade Straight Mineral Oil: Use to replenish supply during the first 25 hours. Continental Motors Specification MHS-24 Aviation Grade Ashless Dispersant Oil: Oil conforming to Continental Motors Specification MHS-24, and all revisions or supplements thereto, must be used after first 25 hours. Refer to Continental Aircraft Engine Service Bulletin M82-8, and any superseding bulletins, revisions, or supplements thereto, for further recommendations. Recommended Viscosity for Temperature Range: All temperatures, use multi-viscosity oil or Above 4 o C (40 o F), use SAE 50. Below 4 o C (40 o F), use SAE 30. NOTE When operating temperatures overlap, use the lighter grade of oil. Multiviscosity oil is recommended for improved starting in cold weather. DOCUMENT NUMBER C180-550-APSFM3 Page 10 of 21 Rev 1, Dated: June 28 2005

SECTION II. DESCRIPTION AND OPERATING DETAILS, (Cont d) Oil Capacity: Sump: 12 Quarts Total: 13 Quarts Engine Controls Throttle and Propeller Controls -- No Change. The mixture control, located on the lower center portion of the instrument panel, is a red knob with raised points around the circumference and is equipped with a lock button in the end of the knob. The rich position is full forward, and full aft is the idle cut-off position. For small adjustments, the control may be moved forward by rotating the knob clockwise, and aft by rotating the knob counterclockwise. For rapid or large adjustments, the control may be moved forward or aft by depressing the lock button in the end of the control, and then positioning the control as desired. Engine Instruments Engine operation is monitored by the following instruments: oil pressure gauge, oil temperature gauge, cylinder head temperature gauge, tachometer, and manifold pressure/fuel flow indicator. An economy mixture (EGT) indicator is also available. Air Induction System The engine air induction system receives ram air through an intake in the lower front portion of the engine cowling. The intake is covered by an air filter which removes dust and other foreign matter from the induction air. Airflow passing through the air filter enters an air box which has a cable controlled alternate air valve. If the induction air filter should become blocked, actuating the alternate air control will open the alternate air valve and draw unfiltered air from inside the cowl area. Fuel Injection System The engine is equipped with a fuel injection system. The system is comprised of an engine driven fuel pump, fuel/air control unit, fuel manifold, fuel flow indicator and air bleed type injector nozzles. Fuel is delivered by the engine driven fuel pump to the fuel/air control unit on the bottom of the engine. The fuel/air control unit correctly proportions the fuel flow to the induction air flow. After passing through the control unit, induction air is delivered to the cylinders through intake manifold tubes and metered fuel is delivered to a fuel manifold. DOCUMENT NUMBER C180-550-APSFM3 Page 11 of 21

SECTION II. DESCRIPTION AND OPERATING DETAILS, (Cont d) The fuel manifold, through spring tension on a diaphragm and valve, evenly distributes the fuel to an air-bleed type injector nozzle in the intake valve chamber of each cylinder. A pressure line is also attached to the fuel manifold, and is connected to a fuel flow indicator on the instrument panel. Optional Hand Pump Priming System -- No Change. FUEL SYSTEM IN ADDITION TO THE INFORMATION PROVIDED IN THE OWNERS HANDBOOK THE FOLLOWING INFORMATION IS APPLICABLE. Fuel flows by gravity from the wing tanks to a three-position selector valve, labeled LEFT, RIGHT and BOTH. With the fuel selector in the LEFT, RIGHT, or BOTH position fuel flows through a reservoir tank, the fuel shut off valve, through a bypass in the auxiliary fuel pump (when it is not in operation), the fuel strainer and to an engine driven fuel pump. The engine driven fuel pump delivers the fuel to the fuel control unit where it is metered and directed to a manifold which distributes it to each cylinder. Vapor and excess fuel from the engine driven fuel pump and fuel control unit are returned by way of a vapor return line to the wing tank vent line NOTE Wing heavy conditions may occur during cruising flight. Wing heavy conditions can be alleviated gradually by turning the fuel selector to the heavy wing until balance is achieved then returning the fuel selector to BOTH. An additional fuel sump drain is installed in the aircraft belly aft of the firewall. This drain allows water and or contaminates to be drained from the reservoir tank. An electric fuel pump is used for normal engine starting, minor vapor purging and continued engine operation in the event of an engine driven fuel pump failure. The fuel pump is controlled with a three position toggle switch located in the lower section of the instrument panel. The center position is OFF, up is the PRIME (emergency position), and down is ON. With the fuel pump in the ON position the pump operates at one of two flow rates that are dependent upon the setting of the throttle. With the throttle open to a cruise setting the pump operates at a high enough capacity to supply sufficient fuel flow to maintain flight with an inoperative engine driven fuel pump. When the throttle is moved toward the closed position the flow rate is automatically reduced, preventing an excessive rich mixture during those periods of reduced engine speed. DOCUMENT NUMBER C180-550-APSFM3 Page 12 of 21 Rev 1, Dated: June 28 2005

SECTION II. DESCRIPTION AND OPERATING DETAILS, (Cont d) NOTE With the engine pump operating and the electric fuel pump placed in the ON position an excessively rich fuel mixture will be produced unless the mixture is leaned. The electric fuel pump switch should be OFF for takeoff. Operating the electric fuel pump with the engine OFF will result in flooding of the intake manifold. If a fuel tank is completely exhausted of fuel the electric fuel pump will be needed to assist in restarting the engine. Prior to running a fuel tank dry an operational check of the electric fuel pump should be accomplished Cold Weather Operation The fuel injection system on this engine is considered to be non-icing. In the event that icing conditions cause the intake air filter to become clogged or iced over, the alternate air source should be manually opened. Due to the lower intake pressure available through the alternate air valve, full throttle manifold pressure can decrease approximately 1.5 inches Hg. Engine-Driven Fuel Pump Failure Failure of the engine-driven fuel pump will be evidenced by a sudden reduction in the fuel flow indication prior to a loss of power, while operating from a fuel tank containing adequate fuel. In the event of an engine-driven fuel pump failure during takeoff, immediately hold the auxiliary fuel pump switch in the PRIME position until the airplane is well clear of obstacles. Upon reaching a safe altitude and reducing the power to a cruise setting, release the PRIME position of the switch. The ON position will then provide sufficient fuel flow to maintain engine operation while maneuvering for a landing. If an engine-driven fuel pump failure occurs during cruising flight, apply full rich mixture and hold the auxiliary fuel pump switch in the PRIME position to re-establish fuel flow. Then the normal ON position (down) may be used to sustain level flight. If necessary, additional fuel flow is obtainable by holding the pump switch in the PRIME position. by momentarily switching the pump ON and watching for a slight rise in fuel flow. DOCUMENT NUMBER C180-550-APSFM3 Page 13 of 21

SECTION II. DESCRIPTION AND OPERATING DETAILS, (Cont d) FIRE DURING STARTING OR DURING FLIGHT Improper starting procedures during a difficult or cold start may lead to a backfire which could ignite the fuel in the induction system. If an engine fire occurs during starting turn the Electric Fuel Pump OFF and place the Fuel Shut Off control in the OFF (full out) position. Continue cranking until the fire is out. Secure the aircraft and inspect for damage prior to continuing. If a fire occurs during flight turn the electric fuel pump OFF.. Place the shut off control out (OFF Position), and execute an immediate forced landing. DOCUMENT NUMBER C180-550-APSFM3 Page 14 of 21 Rev 1, Dated: June 28 2005

SECTION II. DESCRIPTION AND OPERATING DETAILS, (Cont d) FUEL SYSTEM DOCUMENT NUMBER C180-550-APSFM3 Page 15 of 21 Rev 1, Dated: June 28 2005

SECTION II. DESCRIPTION AND OPERATING DETAILS, (Cont d) OIL DIPSTICK CALIBRATIONS The oil dipstick is calibrated for both landplane and floatplane/amphibian use. Oil level readings for the floatplane/amphibian will register below the calibrations for the landplane due to the difference in attitude of the airplane. When checking the oil level, take precautions to assure that you are using the correct calibrations for your airplane. The landplane side of the dipstick is marked with four lines representing six, eight, ten and twelve quarts. The bottom line is the six quart level; the top line is the twelve quart (full) level. The floatplane/amphibian side of the dipstick has two x marks. The lower mark indicates nine quarts and the upper mark indicates twelve quarts. DOCUMENT NUMBER C180-550-APSFM3 Page 16 of 21

SECTION III. OPERATING LIMITATIONS. ENGINE OPERATION LIMITATIONS ENGINE This 180 is powered by one Teledyne Continental Motors Corporation model IO-550-D, fuel-injected, direct drive, air-cooled, horizontally opposed, six-cylinder, 550 cubic inch displacement, engine rated at 300 horsepower. OPERATING LIMITATIONS Take-off and Maximum Continuous Power... Full throttle, 2700 RPM Cylinder Head Temperature Maximum...460 o F Oil Temperature Minimum (Take-off)...100 o F Maximum...240 o F Oil Pressure Minimum (Idle)... 10 PSI Maximum... 100 PSI Fuel Flow Maximum... 19.54 PSI...(25.2 gal/hr) POWER PLANT INSTRUMENT MARKINGS OIL TEMPERATURE GAUGE Operation Range (Green ARC)...100 to 240 F Maximum (Red Radial)... 240 F OIL PRESSURE GAUGE Minimum(Idle) (Red Radial)... 10 PSI Operating Range (Green ARC)... 30 to 60 PSI Maximum (Red Radial)... 100 PSI DOCUMENT NUMBER C180-550-APSFM3 Page 17 of 21

SECTION III. OPERATING LIMITATIONS (Cont d). TACHOMETER (Hartzell Propeller) (PHC-C3YF-1RF/8468A ( )-6R) Operating Range (Green ARC)... 2200 to 2500 RPM Maximum (Red Radial)...2700 RPM TACHOMETER (Hartzell Propeller) (PHC-C3YF-1RF/F7691 ( )) Operating Range (Green ARC)... 2200 to 2500 RPM Maximum (Red Radial)...2700 RPM TACHOMETER (McCauley) (D3A34C401/90DFA-10) Operating Range (Green ARC)... 2200 to 2500 RPM Maximum (Red Radial)...2700 RPM CYLINDER HEAD TEMPERATURE Operating Range (Green ARC)...200 to 460 F Maximum (Red Radial)... 460 F MANIFOLD PRESSURE Normal Operating (Green ARC)... 15.0 to 25.0" HG FUEL FLOW Operating Range (Green ARC)... 7.0 to 17.0 GPH Maximum (Red Radial)... 25.2 GPH...(19.5 PSI) No other powerplant limitation changes. AUX FUEL PUMP The PRIME position of the Auxiliary Fuel Pump Switch is not to be used during flight except when failure of the engine-driven fuel pump occurs. Use the ON position of the Start side of the switch for fuel vaporization problems. DOCUMENT NUMBER C180-550-APSFM3 Page 18 of 21

SECTION III. OPERATING LIMITATIONS (Cont d). MANEUVER LIMITS This is a normal category airplane, Spins are prohibited. No aerobatic maneuvers are approved except those listed under Approved Maneuvers. On the instrument panel close to the Fuel flow gage. MIN. FUEL FLOWS AT FULL THROTTLE RPM SL 4000 8000 12000 2700 24 GPH 22 GPH 20 GPH 18 GPH Near the fuel selector valve: On the instrument panel next to the manifold pressure gage. (For Hartzell Prop: PHC-C3YF-1RF/F7691() Land or Amphib) On the instrument panel above the alternate air control ALT. AIR Adjacent to the fuel shut off control FUEL SHUT OFF DOCUMENT NUMBER C180-550-APSFM3 Page 19 of 21 Rev 1, Dated: June 28 2005

SECTION III. OPERATING LIMITATIONS (Cont d). On oil filler cap (not required if appropriate markings are on cap as received.) Surrounding the Fuel Pump Switch: Fuel Pump Switch - Prime (above switch) - Off (center of switch) - On (below Switch) Near the Auxiliary Fuel Pump Switch: NOISE LEVEL The corrected noise level of this aircraft with this engine and propeller is equivalent to that of production Cessna 180 airplanes. No determination has been made by the Federal Aviation Administration that the noise levels of this airplane are or should be acceptable or unacceptable for operation at, into, or out of, any airport. The above statement notwithstanding, the relative noise level of the modified aircraft has been verified by and approved by the Federal Aviation Administration by comparative means to Production Cessna 180 airplanes. WEIGHT & BALANCE/EQUIPMENT LIST Refer to current weight & balance/equipment list. DOCUMENT NUMBER C180-550-APSFM3 Page 20 of 21

SECTION IV. CARE OF THE AIRPLANE NO CHANGE. SECTION V. OPERATIONAL DATA Performance with the Teledyne Continental IO-550-D Engine and any of the listed propellers equals or exceeds the performance with the original engine and propeller. SECTION VI. OPTIONAL SYSTEMS NO CHANGE. DOCUMENT NUMBER C180-550-APSFM3 Page 21 of 21