Cessna Skyhawk 172N Owner's manual

CESSNA
CONGRATULATIONS
MODEL 172N
-
CONGRATULATIONS
• • • •
Welcome to the ranks of Cessna owners! Your Cessna has been designed and
constructed
to give you the most in performance,economy, and comfort. It isourdesire that
you
will find flying it, either for business or pleasure, a pleasant and profitable experience.
This Pilot's
Operating Handbook has been prepared as a guide to help you getthe mas!
pleasure and
utility from your airplane. It contains information about your Cessna's
equipment, operating procedures, and performance; and suggestions for it; servicing and
care. We urge you
to read it from cover to cover, and to refer to it frequently.
Our interest in your flying pleasure has not ceased with your purchase of a Cessna.
World-wide, the Cessna Dealer Organization backed by the Cessna Customer Services
Department stands ready to serve you. The following services are offered by most Cessna
Dealers:
•
THE CESSNA WARRANTY, which providescoverage for parts and labor, is available at
Cessna Dealers worldwide. Specific benefits and provisions of warranty, plus other
important benefits for you, are contained in your Customer Care Program book,
supplied with your airplane. Warranty service is available to you at authorized Cessna
Dealers throughout the world upon presentation of your CustomerCare Card which
establishes your eligibility under the warranty.
• FACTORY TRAINED
PERSONNEL to provide you with courteous expert service.
• FACTORY APPROVED
SERVICE EQUIPMENT to provide you efficient and accurate
workmanship.
• A STOCK
OF GENUINE CESSNA SERVICE PARTS on hand when you need them.
•
THE LATEST AUTHORITATIVE INFORMATION FOR SERVICING CESSNA AIR-
PLAN ES. since Cessna. Dealers have all of the Service Manuals and Parts Catalogs, kept
current by Service Letters and Service News Letters, published by Cessna Aircraft
Company.
We
urge all Cessna owners to use the Cessna Dealer Organization to the fullest.
A
current Cessna Dealer Directory accompanies your new airplane. The Directory is
revised frequently, and a current copy can be obtained from your Cessna Dealer. Make your
Directory one of your cross-country flight planning aids; a warm welcome awaits you at
every Cessna Dealer.
1 July 1978

EC-IUD
17270396
AMENDED BY
SUPPLEMENT

PERFORMANCE-
CESSNA
SPECIFICATIONS
MODEL 172N
PERFORMANCE - SPECIFICATIONS
SPEED:
Maximum at Sea Level . . . . . . . . . . . . . . .
Cruise, 75% Power at 8000 Ft ............
CRUISE: Recommended lean mixture with fuel allowance for
engine start, taxi, takeoff, climb and 45 minutes
reserve at 45% power.
75% Power at 8000 Ft . . ·
Range
40 Gallons Usable Fuel
Time
75% Power at 8000 Ft . . . ·
Range
50 Gallons Usable Fuel
Time
Maximum Range at 10,000 Ft
· Range
40 Gallons Usable Fuel
Time
Maximum Range at 10,000 Ft
· Range
50 Gallons Usable Fuel
Time
RATE OF CLIMB AT SEA LEVEL
SERVICE CEILING
TAKEOFF PERFORMANCE:
Ground Roll . . . . . .
Total Distance Over 50-Ft Obstacle
LANDING PERFORMANCE:
Ground Roll . . . . . . . . . .
Total Distance Over 50-Ft Obstacle
STALL SPEED (CAS):
Flaps Up, Power Off
Flaps Down, Power Off
MAXIMUM WEIGHT:
Ramp ....... .
Takeoff or Landing . .
STANDARD EMPTY WEIGHT:
Skyhawk ...... .
Skyhawk II ..... .
MAXIMUM USEFUL LOAD:
Skyhawk ..... .
Skyhawk II ..... .
BAGGAGE ALLOWANCE
WING LOADING: Pounds/Sq Ft
POWER LOADING: Pounds/HP
FUEL CAPACITY: Total
Standard Tanks
Long Range Tanks
OIL CAPACITY
ENGINE: Avco Lycoming
160 BHP at 2700 RPM
PROPELLER: Fixed Pitch, Diameter
125 KNOTS
122 KNOTS
485NM
4.1 HRS
630 NM
5.3 HRS
575NM
5.7 HRS
750NM
7.4 HRS
770 FPM
14,200 FT
805 FT
1440 FT
520 FT
1250 FT
50 KNOTS
44 KNOTS
2307 LBS
2300 LBS
1397 LBS
1424 LBS
910 LBS
883 LBS
120 LBS
13.2
14.4
43
GAL.
54 GAL.
6 QTS
0-320-H2AD
75 IN.
1 July 1978
ii

CESSNA
COVERAGE/REVISIONS/
MODEL 172N
LOG OF EFFECTIVE PAGES
COVERAGE
The Pilot's Operating Handbook in the airplane at the time of delivery from Cessna Aircraft
Company contains information applicable to the 1979 Modell72N airplane designated by the serial
number and registration number shown on the Title Page of this handbook.
REVISIONS
Changes andlor additions to this handbook will be covered by revisions published by Cessna
Aircraft Company. These revisions are distributed to all Cessna Dealers and to owners of U. S.
Registered aircraft according to FAA records at the time of revision issuance.
Revisions should be examined immediately upon receipt and incorporated in this handbook.
NOTE
It is the responsibility of the owner to maintain this handbook in a current
status when it is being used for operational purposes.
Owners should contact their Cessna Dealer whenever the revision status of their handbook is in
question.
A revision bar wi II extend the full length of new or revised text and/or illustrations added on new
or presently existing pages. This bar will be located adjacent to the applicable revised area on the
outer margin of the page.
All reVISed pages will carry the revision number and date on the applicable page.
The following Log of Effective Pages provides the dates of issue for original and revised
a listing of ali pages in the handbook. Pages aHected by the current revision are
......... asterisk (') preceding the pages listed.
LOG OF EFFECTIVE PAGES
Dates of issue for original and revised pages are:
Original. .1 July 1978
Page Date Page
Date
Title. . . . . . . . . . . . . . . . . .. .. 1 July 1978
6-1 .............. . ...... 1 luly 1978
Assignment Record ........ 1 July 1978
6-2 Blank ................. 1 July 1978
i
thru iv ................. 1 July 1978 6-3 thru 6-23. . .. . ....... 1 July 1978
1-1
thru 1-9 ............... 1 July 1978 6-24 Blank. . . . . . .. ... . .. 1 July 1978
1-1D
Blank ................ 1 July 1978 7-1
thru 7-38...... . .... 1 July 1978
2-1 ....................... 1 July 1978 8-1 . . . . . . . . . . . . . . . . .
.. . .. 1 July 1978
2-2
Blank. . . . . . . . .. . ..... 1 July 1978 8-2 Blank. . .. . ........... 1 July 1978
2-3
thru 2-12 .............. 1 July 1978 8-3
thru 8-14 .............. 1 July 1978
3-1 thru 3·9 ...... · ......... 1 July 1978
9-1 thru 9-2 .............. 1 July 1978
3-1D Blank ................ 1 July 1978
3-11 thru 3-18 ............. 1 July 1978
4-1
thru 4-24 .............. 1 July 1978
5-1 . . . . . . . . . . . . . . . . . . . .
.. 1 July 1978 NOTE
5-2 Blank
................. 1 July 1978 Refer to Section 9 Table of Contents
5-3 thru 5-21 .............. 1 July 1978 for supplements applicable to optional
5-22
Blank ................ 1 July 1978 systems.
1 July 1978
iii

1
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TABLE OF CONTENTS
CESSNA
MODEL 172N
TABLE OF CONTENTS
SECTION
GENERAL
............................. 1
WEIGHT & BALANCE/
AIRPLANE & SYSTEMS
AIRPLANE
HANDLING,
SUPPLEMENTS
(Optional Systems Description
LlMITATIONS ......................... 2
EMERGENCY PROCEDURES
............ 3
NORMAL PROCEDURES ............... 4
PERFORMANCE ....................... 5
EQUIPMENT LIST ................. 6
DESCRiPTIONS
................... 7
SERVICE &
MAINTENANCE ........ 8
&
Operating Procedures) .......... 9
1 July 1978
iv

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CESSNA
SECTION 1
MODEL 172N
GENERAL
SECTION 1
GENERAL
TABLE OF CONTENTS
Page
Three View 1-2
Introduction 1-3
Descriptive Data 1-3
Engine 1-3
Propeller 1-3
Fuel . . 1-3
Oil 14
Maximum Certificated Weights 1-5
Standard Airplane Weights 1-5
Cabin And Entry Dimensions . 1-5
Baggage Space And Entry Dimensions 1-5
Specific Loadings ......... 1-5
Symbols, Abbreviations And Terminology 1-6
General Airspeed Terminology And Symbols 1-6
Meteorological Terminology ....... 1-6
Engine Power Terminology . . . . . . . . 1-7
Airplane Performance And Flight Planning Terminology 1-7
Weight And Balance Terminology . . . . . . . . . . . 1-8
1
July 1978 1-1

SECTION 1
CESSNA
GENERAL
MODEL 172N
26'.11"--~---- L _____
Maximum height shown with nos.e
gear depressed, all tires and nose
strut properly inflated, and flashing
beacon installed.
3. Wheel base length is 65"
4. Propeller ground clearance is 11 3/4".
5. Wing area is 174 square feet.
6. Minimum turning radius (* pivot point
to outboard wing tip. is 27'~51/2".
PIVOT POINT PIVOT POINT
* *
Figure 1-1. Three View
1-2 1 July 1978

CESSNA
SECTION 1
MODEL 172N
GENERAL
INTRODUCTION
_ This handbook contains 9 sections, and includes the material required
to be furnished to the pilot by CAR Part 3. It also contains supplemental
data supplied by Cessna Aircraft Company.
Section 1 provides basic data and information of general interest. It
also contains definitions or explanations of symbols, abbreviations, and
terminology commonly used.
-
DESCRIPTIVE DATA
ENGINE
_ Number of Engines: 1.
Engine Manufacturer: A vco Lycoming.
Engine Model Number: 0-320-H2AD.
Engine Type: Normally-aspirated, direct-drive, air-cooled, hor~
opposed, carburetor equipped, four-cylinder engine with 320 cu. m.
displacement.
Horsepower Rating and Engine Speed: 160 rated BHP at 2700 RPM.
-PROPELLER
Propeller Manufacturer: McCauley Accessory Division.
Propeller Model Number: 1C160/DTM7557.
Number of Blades: 2.
Propeller Diameter, Maximum: 75 inches.
Minimum: 74 inches.
Propeller Type: Fixed pitch.
FUEL
Approved Fuel Grades (and Colors):
100LL Grade Aviation Fuel (Blue).
100 (Formerly 100/130) Grade Aviation Fuel (Green).
1 July 1978 1-3

SECTION 1
CESSNA
GENERAL
MODEL 172N
Fuel Capacity:
Standard Tanks:
Total Capacity: 43 gallons.
Total Capacity Each Tank: 21.5 gallons.
Total Usable: 40 gallons.
Long Range Tanks:
Total Capacity: 54 gallons.
Total Capacity Each Tank: 27 gallons.
Total Usable: 50 gallons.
NOTE
To ensure maximum fuel capacity when refueling and
minimize cross-feeding when parked on a sloping surface,
place the fuel selector valve in either LEFT or RIGHT
position.
OIL
Oil Grade (Specification):
MIL-L-6082 Aviation Grade Straight Mineral Oil: Use to replenish
-su:{Sply during first 25 hours and at the first 25-hour oil change.
Continue to use until a total of 50 hours has accumulated or oil
consumption has stabilized.
NOTE
The airplane was delivered from the factory with a corro-
sion preventive aircraft engine oil. This oil should be
drained after the first 25 hours of operation.
MIL-L-22851 Ashless Dispersant Oil: This oil must be used after first
50 hours or consumption has stabilized.
Recommended Viscosity for Temperature Range:
MIL-L-6082 Aviation Grade Straight Mineral Oil:
SAE 50 above 16°C (60°F).
SAE 40 between _1°C (30°F) and 32°C (90°F).
SAE 30 between -18°C (OOF) and 21°C (70°F).
SAE 20 below -12°C (10°F).
MIL-L-22851
Ashless Dispersant Oil:
SAE 40 or SAE 50 above 16°C (60°F).
SAE 40 between -1°C (30°F) and 32°C (90°F).
SAE 30 or SAE 40 between -18°C (O°F) and 21°C (70°F).
SAE 30 below -12°C (lOOF).
Oil Capacity:
Sump: 6 Quarts.
Total: 7 Quarts (if oil filter installed).
1-4 1
July 1978

CESSNA
SECTION 1
MODEL 172N
GENERAL
MAXIMUM CERTIFICATED WEIGHTS
Ramp, Normal Category: 23071bs.
Utility Category: 2007 lbs.
Takeoff, Normal Category: 2300 lbs.
Utility Category: 2000 lbs.
Landing, Normal Category: 2300 lbs.
Utility Category: 2000 lbs.
Weight in Baggage Compartment, Normal Category:
Baggage Area 1 (or passenger on child's seat) - Station 82 to 108: 120
lbs. See note below.
Baggage Area 2 - Station 108 to 142: 50 lbs. See note below.
NOTE
The maximum combined weight capacity for baggage
areas 1 and 2 is 120 lbs.
Weight in Baggage Compartment, Utility Category: In this category, the
baggage compartment and rear seat must not be occupied.
STANDARD AIRPLANE WEIGHTS
Standard Empty Weight, Skyhawk: 13971bs.
Skyhawk II: 14241bs.
Maximum Useful Load:
Normal Category
Utility Category
Skyhawk:
9101bs. 6101bs.
Skyhawk II:
8831bs.
5831bs.
CABIN AND ENTRY DIMENSIONS
Detailed dimensions of the cabin interior and entry door openings are
illustrated in Section 6.
BAGGAGE SPACE AND ENTRY DIMENSIONS
Dimensions of the baggage area and baggage door opening are
illustrated in detail in Section 6.
SPECIFIC LOADINGS
Wing Loading: 13.2 lbs./ sq. ft.
Power Loading: 14.4 lbs./hp.
1 July 1978 1-5

SECTION 1
CESSNA
GENERAL
MODEL 172N
SYMBOLS, ABBREVIATIONS AND
TERMINOLOGY
GENERAL AIRSPEED TERMINOLOGY AND SYMBOLS
KCAS
KIAS
KTAS
V
NE
Knots Calibrated Airspeed is indicated airspeed corrected
for position and instrument error and expressed in knots.
Knots calibrated airspeed is equal to KT AS in standard
atmosphere at sea level.
Knots Indicated Airspeed is the speed shown on the
airspeed indicator and expressed in knots.
Knots True Airspeed is the airspeed expressed in knots
relative to undisturbed air which is KCAS corrected for
altitude and temperature.
Manuevering Speed is the maximum speed at which you
may use abrupt control travel.
Maximum Flap Extended Speed is the highest speed
permissible with wing flaps in a prescribed extended
position.
Maximum Structural Cruising Speed is the speed that
should not be exceeded except in smooth air, then only with
caution.
Never Exceed Speed is the speed limit that may not be
exceeded at any time.
Stalling Speed or the minimum steady flight speed at
which the airplane is controllable.
Stalling Speed or the minimum steady flight speed at
which the airplane is controllable in the landing configu-
ration at the most forward center of gravity.
Best Angle-of-Climb Speed is the speed which results in
the greatest gain of altitude in a given horizontal distance.
Best Rate-of-Climb Speed is the speed which results in the
greatest gain in altitude in a given time.
METEOROLOGICAL TERMINOLOGY
OAT
Outside Air Temperature is the free air static tem perature.
1-6 1
July 1978

CESSNA
MODEL 172N
Standard
Tempera-
ture
Pressure
Altitude
SECTION 1
GENERAL
It is expressed in either degrees Celsius or degrees Fah-
renheit.
Standard Temperature is 15°C at sea level pressure alti-
tude and decreases by 2°C for each 1000 feet of altitude.
Pressure Altitude is the altitude read from an altimeter
when the altimeter's barometric scale has been set to 29.92
inches of mercury (1013 mb).
ENGINE POWER TERMINOLOGY
BHP
Brake Horsepower is the power developed by the engine.
RPM
Revolutions Per Minute is engine speed.
Static
Static RPM is engine speed attained during a full-throttle
RPM
engine runup when the airplane is on the ground and
stationary.
AIRPLANE PERFORMANCE AND FLIGHT PLANNING
TERMINOLOGY
Demon-
strated
Crosswind
Velocity
Usable Fuel
Unusable
Fuel
GPH
NMPG
g
1
July 1978
Demonstrated Crosswind Velocity is the velocity of the
crosswind component for which adequate control of the
airplane during takeoff and landing was actually demon-
strated during certification tests. The value shown is not
considered to be limiting.
Usable Fuel is the fuel available for flight planning.
Unusable Fuel is the quantity of fuel that can not be safely
used in flight.
Gallons Per Hour is the amount of fuel (in gallons)
consumed per hour.
Nautical Miles Per Gallon is the distance (in nautical
miles) which can be expected per gallon of fuel consumed
at a specific engine power setting and! or flight configura-
tion.
g is acceleration due to gravity.
1-7

SECTION 1
CESSNA
GENERAL
MODEL 172N
WEIGHT AND BALANCE TERMINOLOGY
Reference
Datum
Station
Arm
Moment
Center of
Gravity
(C. G.)
C.G.
Arm
C.G.
Limits
Standard
Empty
Weight
Basic Empty
Weight
Useful
Load
Maximum
Ramp
Weight
Maximum
Takeoff
Weight
Reference Datum is an imaginary vertical plane from
which all horizontal distances are measured for balance
purposes.
Station is a location along the airplane fuselage given in
terms of the distance from the reference datum.
Arm is the horizontal distance from the reference datum to
the center of gravity (C.G.) of an item.
Moment is the product of the weight of an item multiplied
by its arm. (Moment divided by the constant 1000 is used in
this handbook to simplify balance calculations by reduc-
ing the number of digits.)
Center of Gravity is the point at which an airplane, or
equipment. would balance if suspended. Its distance from
the reference datum is found by dividing the total moment
by the total weight of the airplane.
Center of Gravity Arm is the arm obtained by adding the
airplane's individual moments and dividing the sum by
the total weight.
Center of Gravity Limits are the extreme center of gravity
locations within which the airplane must be operated at a
given weight.
Standard Empty Weight is the weight of a standard air-
plane, including unusable fuel, full operating fluids and
full engine oil.
Basic Empty Weight is the standard empty weight plus the
weight of optional equipment.
Useful Load is the difference between ramp weight and the
basic empty weight.
Maximum Ramp Weight is the maximum weigh t approved
for ground maneuver. (It includes the weight of start, taxi,
and runup fuel.)
Maximum Takeoff Weight is the maximum weight ap-
proved for the start of the takeoff run.
1 July 1978
1-8

CESSNA
MODEL 172N
Maximum
Landing
Weight
Tare
-
-
-
-
-
SECTION 1
GENERAL
Maximum Landing Weight is the maximum weight ap-
proved for the landing touchdown.
Tare is the weight of chocks, blocks, stands, etc. used when
weighing an airplane, and is included in the scale read-
ings. Tare is deducted from the scale reading to obtain the
actual (net) airplane weight.
1 July 1978
1-9/ (1-10 blank)

CESSNA
SECTION 2
MODEL 172N
LIMITATIONS
SECTION 2
LIMIT ATIONS
TABLE OF CONTENTS
Page
Introduction . . . . . . . . 2-3
Airspeed Limitations
2-4
Airspeed Indicator Markings 2-5
Power Plant Limitations 2-5
Power Plant Instrument Markings
2-6
Weight Limits .....
2-6
Normal Category . . 2-6
Utility Category . . 2-7
Center Of Gravity Limits
2-7
Normal Category
2-7
Utility Category
2-7
Maneuver Limits
2-7
Normal Category
2-7
Utility Category
2-7
Flight Load Factor Limits
2-8
Normal Category . . . 2-8
Utility Category
2-8
Kinds Of Operation Limits
2-9
Fuel Limitations . . 2-9
Other Limitations
2-9
Flap Limitations
2-9
Placards .....
2-10
1
July 1978 2-1/(2-2
blank)

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