AC 90-89A

Historical

Advisory circular · Amateur-Built Aircraft and Ultralight Flight Testing Handbook

A newer version is currentThis is a historical version. AC 90-89C is the version in force, approved February 14, 2023.
Approved
May 24, 1995
Last reviewed
July 19, 2024
Cancels
AC90-89
Cancelled by
AC90-89B
Family
AC 90-89 · 3 versions
Revision
A
14 CFR parts
21, 103, 91, 43

Guidance, not mandatory unless a rule or AD requires it. DRS record last changed November 22, 2025.

Show pages 78–89

5 5/24/95 AC 90-89A Appendix 1 APPENDIX 1. SAMPLE CHECKLIST FOR A CONDITION INSPECTION—Continued S = SATISFACTORY U = UNSATISFACTORY (correct all unsatisfactory items prior to flight) Builder/Inspector

S U S U ENGINE:

PERFORM COMPRESSION TEST #1 /emlowln/emlowln/emlowln/wdspc #2 /emlowln/emlowln/emlowln #3 /emlowln/emlowln/emlowln/wdspc #4 /emlowln/emlowln/emlowln/wdspc #5 /emlowln/emlowln/emlowln/wdspc #6 /emlowln/emlowln/emlowln

CHANGE OIL AND FILTER (CHECK FOR METAL)

INSPECT IGNITION HARNESS FOR CONDITION AND CONTINUITY

CHECK IGNITION LEAD CIGARETTES FOR CONDITION/CRACKS

CLEAN AND GAP SPARK PLUGS

CHECK MAGNETO TIMING/POINTS/OIL SEAL/DISTRIBUTOR

INSPECT ENGINE MOUNT/BUSHINGS

INSPECT ENGINE MOUNT ATTACHMENT BOLT TORQUE

INSPECT ALTERNATOR/GENERATOR ATTACHMENT

CHECK ALTERNATOR/GENERATOR BELT CONDITION

INSPECT CYLINDERS FOR CRACKS/BROKEN FINS/ EXHAUST STAINS

INSPECT ENGINE BAFFLES FOR CRACKS/CONDITION

CHECK FOR OIL LEAKS INSPECT VACUUM PUMP AND LINES

INSPECT OIL VENT LINES

INSPECT ALL CABIN HEAT/CARB HEAT/DEFROSTER DUCTS FOR CONDITION

INSPECT CARBURETOR FOR SECURITY & CLEAN INLET SCREEN

INSPECT INTAKE HOSES/SEALS FOR SECURITY/LEAKS

INSPECT THROTTLE/MIXTURE/CARB HEAT/CONTROL FOR

PROPER TRAVEL AND SECURITY

INSPECT CARB HEAT AIR BOX FOR CRACKS/OPERATION

INSPECT CONDITION OF FLEXIBLE FUEL AND OIL LINES

INSPECT OIL COOLER FOR LEAKS AND CONDITION

CHECK EXHAUST SYSTEM FOR ATTACHMENT AND CONDITION

CHECK MUFFLER/INTERNAL BAFFLE/ FOR SECURITY

CHECK EXHAUST PIPES/FLANGES FOR SECURITY & ATTACHMENT

REPACK EXHAUST GASKETS AS REQUIRED

CHECK COWLING FOR CRACKS AND SECURITY

6 5/24/95 AC 90-89A Appendix 1 APPENDIX 1. SAMPLE CHECKLIST FOR A CONDITION INSPECTION—Continued S = SATISFACTORY U = UNSATISFACTORY (correct all unsatisfactory items prior to flight) Builder/Inspector

S U S U FOR U/L:

CHECK CARB BOOTS ON 2 CYCLE ENGINES FOR CRACKS

CHECK SAFETIES ON EXHAUST SPRINGS PERFORM 2 CYCLE COMPRESSION TEST TO CHECK SEALS

ENSURE SPARK PLUG CAPS ARE SAFETIED ON INVERTED ENGINES PROPELLER:

CHECK SPINNER AND BACK PLATE FOR CRACKS

INSPECT FOR CRACKS/STONE DAMAGE/NICKS

CHECK FOR DELAMINATION (WOOD/COMPOSITE BLADES)

CHECK PROP BOLTS TORQUE/SAFETY WIRE

CHECK FOR OIL LEAKS (CRANKCASE NOSE SEAL)

GREASE LEAKS (CONSTANT SPEED PROP)

CHECK PROPELLER GOVERNOR FOR LEAKS AND OPERATION

CHECK PROP TRACK

CHECK PROP BALANCE (WOOD PROP)

ELECTRICAL

SPARE FUSES AVAILABLE

BATTERY SERVICED AND FREE FROM CORROSION

BATTERY BOX FREE FROM CORROSION

ELT BATTERY FREE FROM CORROSION AND CURRENT BATTERY

CHECK LANDING LIGHT OPERATION

CHECK POSITION LIGHTS OPERATION

CHECK ANTI COLLISION LIGHT FOR OPERATION

INSPECT ALL ANTENNA MOUNTS AND WIRING FOR SECURITY

CHECK ALL GROUNDING WIRES (ENGINE TO AIRFRAME, WING TO AILERON/ FLAP, ETC.)

INSPECT RADIOS/LEADS/WIRES FOR ATTACHMENT & SECURITY

INSPECT CIRCUIT BREAKERS/FUSES PANELS FOR CONDITION

7 5/24/95 AC 90-89A Appendix 1 APPENDIX 1. SAMPLE CHECKLIST FOR A CONDITION INSPECTION—Continued S = SATISFACTORY U = UNSATISFACTORY (correct all unsatisfactory items prior to flight) Builder/Inspector

S U S U OPERATIONAL INSPECTION:

VISUAL INSPECTION OF THE ENGINE/PROPELLER

ALL INSPECTION PANELS AND FAIRINGS SECURE

PERSONNEL WITH FIRE BOTTLE STANDING BY

BRAKE SYSTEM CHECK

PROPER FUEL IN TANKS

ENGINE START PROCEDURES

OIL PRESSURE/OIL TEMPERATURE WITHIN LIMITS

VACUUM GAUGE CHECK

MAGNETO CHECK/HOT MAG CHECK

IDLE RPM/MIXTURE CHECK

STATIC RPM CHECK

ELECTRICAL SYSTEM CHECK

COOL DOWN PERIOD/ENGINE SHUT DOWN

PERFORM OIL, HYDRAULIC, AND FUEL LEAK CHECK PAPERWORK:

AIRWORTHINESS DIRECTIVES

RECORD FINDINGS AND SIGN OFF INSPECTION AND

MAINTENANCE IN AIRCRAFT LOG BOOKS

8 5/24/95 AC 90-89A Appendix 1

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1 5/24/95 AC 90-89A Appendix 2 APPENDIX 2. ADDRESSES FOR ACCIDENT/INCIDENT

INFORMATION Accident/incident reports for all U.S.-registered make and model aircraft are available from the following sources:

Federal Aviation Administration (FAA) Information Management Section, AFS-624 P.O. Box 25082 Oklahoma City, OK 73125 FAX: (405) 954-4655 Experimental Aircraft Association (EAA) P.O. Box 3086 Attention: Information Services Wittman Airfield Oshkosh, WI 54903-3086 TEL: (414) 426-4821 National Transportation Safety Board (NTSB) Public Inquiry Section RE-51 490 L’Enfant Plaza, SW.

Washington, DC 20594 TEL: (202) 382-6735 Upon writtern request, the FAA will supply summary formatted computer print-outs on all accidents and incidents concerning all makes and models of general aviation and amateur-built aircraft. Reports for an individual aircraft accident/incident, or a summary accident/incident report on all aircraft accidents and incidents for a particular make and model, are also available. Requests must be in writing via mail or FAX.

The FAA, EAA, and the NTSB require the date, location of the accident, and if possible, the ‘‘N’’ number for a single aircraft accident. Identify the make and model aircraft (e.g., Poteen Rocket, model OB-1) only if ALL the accidents/incidents for a particular aircraft design are being requested.

A single, computerized report runs approximately 2 pages in length. If the accident is over 18 months old, the report will list probable causes.

A processing fee may be charged for each request based on the number and length of the reports requested.

For Ultralight Accident/Incident information, call or write to the following address:

FAA Safety Data Exchange ACE-103 Attention: Ben Morrow 1201 Walnut Street, Suite 900 Kansas City, MO 64106 TEL: (816) 426-3580 Service reports and service information also are available by computer by dialing the FAA Safety Data Exchange telephone, (800) 426-3814. The system operates at 1200 thru 9600 Baud rates, and the other parameters are: 8 N 1. It is suggested ANSI or VT100 emulations be used.

2 5/24/95 AC 90-89A Appendix 2

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1 5/24/95 AC 90-89A Appendix 3 APPENDIX 3. ADDITIONAL REFERENCES ON FLIGHT

TESTING The following references comprise selected additional information sources on flight testing and first flight experiences for amateur-built and ultralight aircraft. This list of informational material may help amateurbuilders in preparing the FLIGHT TEST PLAN for their aircraft.

INDUSTRY PUBLICATIONS: Amateur-Built Askue, Vaughan, Flight Testing Homebuilt Aircraft, (Ames, IA: State University Press, 1992) Ariosto, James, ‘‘A Two Minute Test-Hop Reveals All Wrongs,’’ Sport Aviation , (May 1970), pp. 29-30.

Bingelis, Antoni, ‘‘A Report on the 1973 Oshkosh Safety and Courtesy Inspections,’’ Sport Aviation, (November 1973), pp. 35-37.

/emlowln/emlowln/emlowln/emlowln/wdspc ‘‘After the First Test Flight,’’ Sport Aviation, (April 1988), pp. 27-30.

/emlowln/emlowln/emlowln/emlowln/wdspc ‘‘Flight Testing Homebuilts-Stage One: Making Preparations for Flight Testing,’’ Sport Aviation , (January 1989), pp. 27-30.

/emlowln/emlowln/emlowln/emlowln/wdspc ‘‘Flight Testing Homebuilts-Stage Two: Making the Initial Flight Test,’’ Sport Aviation, (February 1989), pp. 27-30.

/emlowln/emlowln/emlowln/emlowln/wdspc ‘‘Flight Testing Homebuilts-Stage Three: Expanding the Flight Envelope,’’ Sport Aviation, (March 1989), pp. 28-31, 66.

Colby, Doug (1986), ‘‘Into the air, Junior Birdman!’’ Homebuilt Aircraft, V. 13, No ?, pp. 44-47.

Dewey, A. J., and Downie, Don, ‘‘Flight Testing the Deweybird,’’ Air Progress Homebuilt Aircraft , (Spring- Summer 1967), pp. 4-9.

Donofrio, P. R., ‘‘Checkmate,’’ Sport Aviation, (June 1978), pp. 30-31.

Dwiggins, Don, ‘‘Flight Testing Your Homebuilt,’’ Homebuilt Aircraft, (July 1985), pp. 40-43.

/emlowln/emlowln/emlowln/emlowln/wdspc ‘‘Flight Testing Your Homebuilt,’’ Plane and Pilot, (Annual, 1974), pp. 56-61.

Enman, Ann, ‘‘The Moment of Truth! The Test Flight,’’ Air Progress 1989 Guide to Sport Aircraft Kits , pp. 16-19.

Experimental Aircraft Association, Pilot Reports and Flight Testing , V. 1, pg. 72 (1977). Selected first flight reports and flight testing procedures.

Friedman, Peter, ‘‘High Tech-First flight,’’ Sport Pilot, (February 1989), pp. 16, 17, 72, 73.

Goyar, Norman, ‘‘Free Insurance and How to Get It,’’ Sport Pilot, j. 5, No. 3 (1989), pp. 44-49.

Hamlin, Benson, Flight Testing Conventional and Jet-Propelled Airplanes, (New York: The MacMillan Company, 1946) Heintz, Chris, ‘‘The First Flight of Your Aircraft,’’ EAA Light Plane World, (May 1986), pp. 7-9.

/emlowln/emlowln/emlowln/emlowln/wdspc ‘‘Performance Testing Your Aircraft,’’ EAA Light Plane World, (July 1986), pp. 13-15.

Hurt, H. H., Jr., Aerodynamics for Naval Aviators, (California: University of Southern California, 1960 [revised 1965]). NAVAIR 00-80T-80. Issued by the Office of the Chief of Naval Operations, Aviation Training Division.

2 5/24/95 AC 90-89A Appendix 3 APPENDIX 3. ADDITIONAL REFERENCES ON FLIGHT TESTING—Continued Jacquemin, G., ‘‘Flight-testing for the Amateur,’’ Sport Aviation, (April 1965), pg. 4.

Kerley, Jim, ‘‘Thoughts on Test Flying,’’ Sport Aviation, (March 1970), pp. 34-35.

Ladd, Robert W., ‘‘The Test Flight of Chihuahua,’’Sport Aviation, (February 1968), pg. 4.

Macq, Harvey, ‘‘Test Flight,’’ Sport Aviation, (March 1960), pg. 3.

Mason, Sammy, Stalls, Spins, and Safety, (New York: Macmillan Publishing Company, 1985) Mitchell, C.G.B., ‘‘Design of the ‘Kittiwake’ Family of Light Aircraft,’’ (Part 2) Sport Aviation , (March 1969), pp. 36-37.

Rhodes, Mike, ‘‘First Flight—Trial by Fire,’’ (Part 1) Sport Aviation, (August 1988), pp. 26, 27, 29.

Smith, Hubert, Performance Flight Testing , (Blue Ridge Summit: Tab Books, Inc. [Modern Aviation Series], 1982), pg. 131.

Sport Aviation, ‘‘Pointers on Test Flying Complied by Chapter 32, St. Louis, MO,’’ Sport Aviation, (December 1960), pg. 3.

Sport Planes, ‘‘The Sacramento Seaplanes,’’ Sport Planes, (Fall 1970), pp. 16-27.

Taylor, M. B., ‘‘Testing your Homebuilt,’’ Sport Aviation, (January 1977), pg. 24-27.

Tausworthe, Jim, ‘‘The Brotherhood of Flight,’’ Sport Aviation, (August 1969), pg. 22.

Thorp, J. W., ‘‘Structural Flight Testing,’’ Sport Aviation, (November 1961), pg. 2.

Wendt, H. O., ‘‘Designing, Building, and Flight Testing of the Wendt Wh-1 Traveler,’’ Sport Aviation , (March 1973), pg. 10-15.

White, E. J., ‘‘Super Coot—The Fishermans Homebuilt,’’ Homebuilt Aircraft, (September 5, 1981), pg. 18-

21.

Wood, Karl D., Technical Aerodynamics, (New York: McGraw Hill, 1947) INDUSTRY PUBLICATIONS: Ultralight Brooke, Rob, ‘‘Greatest Peril,’’ Ultralight Flying, (September 1993), pp. 42-43.

Cannon, Mike, ‘‘Learning to Fly—Again,’’ Ultralight Flying, (June 1988), pp. 5 /emlowln/emlowln/emlowln/emlowln/wdspc ‘‘Keeping Cool in the Summer Time,’’ Ultralight Flying, (August 1988), pp. 16-17.

Cartier, Kerry, ‘‘Power Failure on Take-off,’’ Ultralight Flying, (January 1988), pp. 25.

Chapman, John, and Smith, Clark, ‘‘Preparing for the In-Flight Emergency,’’ Ultralight Flying, (March 1989), pp. 32.

Demeter, Dennis, ‘‘Risk Management,’’ Ultralight Flying, (July 1993), pp. 48-49.

/emlowln/emlowln/emlowln/emlowln/wdspc ‘‘Don’t Forget the Pre-flight,’’ Ultralight Flying, (May 1993), pp. 70-71.

Grunnarson, Tom, ‘‘Getting into Ultralight Float Flying,’’ Ultralight Flying, (April 1989), pp. 27-29.

Johnson, Don, ‘‘Getting the Most out of Flight Reviews,’’ Ultralight Flying, (March 1989), pp. 20-23.

Loveman, Dave, ‘‘Problem-Solving the Cayuna 430R,’’ Ultralight Flying, (June 1988), pp. 24-25.

3 5/24/95 AC 90-89A Appendix 3 APPENDIX 3. ADDITIONAL REFERENCES ON FLIGHT TESTING—Continued Pagen, Dennis, ‘‘‘G’ forces and your Ultralight,’’ Ultralight Flying, (August 1989), pp. 37.

/emlowln/emlowln/emlowln/emlowln/wdspc ‘‘Weight and Speed,’’ Ultralight Flying, (May 1989), pp. 20-21.

Peghiny, Tom, ‘‘Effects of Sunlight on Polyester Sail Cloth,’’ Ultralight Foundation , Volume 2, Number 1, pp. 49-50, (1986).

GOVERNMENT PUBLICATIONS:

Send a written request for free Advisory Circulars to the FAX or address listed below.

Department of Transportation (DOT) Property Use and Storage Section, M-45.3 Washington, DC 20590 FAX: (202) 366-2795 Advisory Circulars (AC) with a stock number and dollar amount can be obtained from:

New Orders Superintendent of Documents P.O. Box 371954 Pittsburgh PA 15250-7954 TEL: (202) 783-3238 (Order Desk) NOTE: Make the check payable to the Superintendent of Documents.

AC 00-2.8 ‘‘Advisory Circular Checklist (and Status of Other FAA Publications)’’ AC 20-27 ‘‘Certification and Operation of Amateur-Built Aircraft’’ AC 20-32 ‘‘Carbon Monoxide (CO) Contamination in Aircraft—Detection and Prevention’’ AC 20-34, ‘‘Prevention of Retractable Landing Gear Failures’’ AC 20-35, ‘‘Tiedown Sense’’ AC 20-37, ‘‘Aircraft Metal Propeller Maintenance’’ AC 20-42, ‘‘Hand Fire Extinguishers for Use in Aircraft’’ AC 20-103, ‘‘Aircraft Engine Crankshaft Failure’’ AC 20-105, ‘‘Engine Power-Loss Accident Prevention’’ AC 20-106, ‘‘Aircraft Inspection for the General Aviation Aircraft Owner’’ AC 20-125, ‘‘Water in Aviation Fuels’’ AC 23-8, ‘‘Flight Test Guide for Certification of Part 23 Airplanes’’ (Available from the Sup. Docs., SN 050-007-00817-1, cost $12.00) AC 23.955-1,‘‘Substantiating Flow Rates and Pressures in Fuel Systems of Small Airplanes’’ AC 23.959-1,‘‘Unusable Fuel Test Procedures for Small Airplanes’’ AC 61-21A, ‘‘Flight Training Handbook’’ (Available from the Sup. Docs., SN 050-007-00504-1, cost $17.00)

4 5/24/95 AC 90-89A Appendix 3 APPENDIX 3. ADDITIONAL REFERENCES ON FLIGHT TESTING—Continued AC 61-23B, ‘‘Pilot’s Handbook of Aeronautical Knowledge’’ (Available from the Sup. Docs., SN 050-011- 00077-1, cost $10.00) AC 61-107, ‘‘Operations of Aircraft at Altitudes Above 25,000 Feet MSL and/or Mach Numbers (Mmo) Greater Than .75’’ AC 91-23A, ‘‘Pilot’s Weight and Balance Handbook’’ (Available from the Sup. Docs., SN 050-007-00405- 2, cost $5.00) AC 91-46, ‘‘Gyroscopic Instruments—Good Operating Practices’’ AC 91-48, ‘‘Acrobatics—Precision Flying With a Purpose’’ AC 91-59, ‘‘Inspection and Care of General Aviation Aircraft Exhaust Systems’’ AC 91-61, ‘‘A Hazard in Aerobatics: Effects or G-Forces of Pilots’’ AC 103-6, ‘‘Ultralight Vehicle Operations-Airports, Air Traffic Control (ATC), and Weather’’ AC 103-7, ‘‘The Ultralight Vehicle’’ Airman’s Information Manual (AIM): Official Guide to Basic Flight Information and ATC Procedures. For price and availability, call (202) 783-3238.