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 73–84

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1 5/24/95 AC 90-89A Appendix 1 APPENDIX 1. SAMPLE CHECKLIST FOR A CONDITION

INSPECTION AIRCRAFT IDENTIFICATION:

TYPE/SN. /emlowln/emlowln/emlowln/emlowln/emlowln/emlowln/emlowln/emlowln/emlowln/emlowln/emlowln ENGINE MODEL/SN. /emlowln/emlowln/emlowln/emlowln/emlowln/emlowln/emlowln/emlowln/emlowln/emlowln/emlowln N NUMBER /emlowln/emlowln/emlowln/emlowln/emlowln/emlowln/emlowln/emlowln/emlowln/emlowln/emlowln/emlowln PROPELLER MODEL/SN. /emlowln/emlowln/emlowln/emlowln/emlowln/emlowln/emlowln/emlowln/emlowln/emlowln A/F TOTAL TIME /emlowln/emlowln/emlowln/emlowln/emlowln/emlowln/emlowln/emlowln/emlowln/emlowln ENGINE TOTAL TIME /emlowln/emlowln/emlowln/emlowln/emlowln/emlowln/emlowln/emlowln/emlowln/emlowln OWNER /emlowln/emlowln/emlowln/emlowln/emlowln/emlowln/emlowln/emlowln/emlowln/emlowln/emlowln/emlowln/emlowln/emlowln PROPELLER TOTAL TIME /emlowln/emlowln/emlowln/emlowln/emlowln/emlowln/emlowln/emlowln/emlowln GENERAL:

S = SATISFACTORY U = UNSATISFACTORY (correct all unsatisfactory items prior to flight) Builder/Inspector

S U S U

REGISTRATION/AIRWORTHINESS/OPERATION LIMITATIONS

AIRCRAFT IDENTIFICATION PLATES INSTALLED

EXPERIMENTAL PLACARD INSTALLED

WEIGHT AND BALANCE/EQUIPMENT LIST (updated for each flight)

RADIO LICENSE WINGS:

REMOVE INSPECTION PLATES/FAIRINGS

GENERAL INSPECTION OF THE EXTERIOR/INTERIOR WING

FLIGHT CONTROLS BALANCE WEIGHTS FOR SECURITY

FLIGHT CONTROLS PROPER ATTACHMENT (NO SLOP)

FLIGHT CONTROL HINGES/ROD END BEARINGS SERVICEABILITY

FLIGHT CONTROLS PROPERLY RIGGED/PROPER TENSION

INSPECT ALL CONTROL STOPS FOR SECURITY

TRIM CONTROL PROPERLY RIGGED TRIM CONTROL SURFACES/HINGES/ROD END BEARINGS SERV.

FRAYED CABLES OR CRACKED/FROZEN PULLEYS

SKIN PANELS DELAMINATE/VOIDS (COIN TEST)

POPPED RIVETS/CRACKED/DEFORMED SKIN

FABRIC/RIB STITCHING/TAPE CONDITION

LUBRICATION

WING ATTACH POINTS

FLYING/LANDING WIRES/STRUTS FOR SECURITY

2 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

CORROSION

FOR U/L AIRCRAFT CHECK

FLIGHT CONTROL BOLTS/PINS FOR SAFETY AND CONDITION

WING/STRUT/CABLE ATTACHMENTS AND HARDWARE FOR SAFETY AND

CONDITION FUEL SYSTEM:

CORROSION

FUEL LINES FOR CHAFING/LEAKS/ SECURITY/CONDITION

SUMP ALL FUEL TANKS FOR WATER OR DEBRIS

FUEL CAPS FOR SECURITY

FUEL PLACARD

FUEL VALVE/CROSS FEED/ FOR OPERATION AND SECURITY

CLEAN FUEL FILTERS/GASOLATOR/FLUSH SYSTEM

INSPECT FUEL TANK VENT SYSTEM LANDING GEAR:

INSPECT STRUTS/TORQUE LINKS FOR ATTACHMENT

INSPECT STRUTS FOR PROPER EXTENSION

3 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

INSPECT FOR HYDRAULIC LEAKS

CHECK ALL BUSHINGS FOR WEAR/FREE PLAY

CHECK LUBRICATION

INSPECT WHEELS FOR ALIGNMENT

WHEEL/TIRES FOR CRACKS AND SERVICEABILITY

WHEEL BEARINGS FOR LUBRICATION

INSPECT FOR CORROSION

INSPECT NOSE GEAR FOR CRACKS AND TRAVEL

INSPECT TAIL WHEEL FOR CRACKS AND TRAVEL

PERFORM GEAR RETRACTION TEST/CK INDICATOR LIGHTS

EMERGENCY GEAR RETRACTION SYSTEM

CHECK TIRE PRESSURE

BRAKE LINING WITHIN LIMITS

BRAKE DISKS FOR CRACKS, WEAR, AND DEFORMITY

BRAKE HYDRAULIC LINES FOR LEAKS AND SECURITY FUSELAGE:

REMOVE INSPECTION PLATES AND PANELS

INSPECT BULKHEADS AND STRINGERS FOR POPPED RIVETS AND CRACKED SKIN

INSPECT FOR DELAMINATED SKIN/VOIDS (COIN TEST)

INSPECT THE SECURITY OF ALL INTERNAL LINES

INSPECT WINDOWS/CANOPY FOR CRACKS AND FIT

INSPECT DOOR OR CANOPY LATCHING MECHANISM

INSPECT FIRE WALL FOR DISTORTION AND CRACKS

INSPECT RUDDER PEDALS AND BRAKES FOR OPERATION AND SECURITY

INSPECT BEHIND FIREWALL FOR LOOSE WIRES AND CHAFING LINES

4 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

CHECK CONTROL STICK/YOKE FOR FREEDOM OF MOVEMENT

CHECK FLAP CONTROL OPERATION

CHECK CABLE AND PULLEYS FOR ATTACHMENT AND OPERATION

PERFORM FLOOD-LIGHT CARBON MONOXIDE TEST

ENSURE THE COCKPIT INSTRUMENTS ARE PROPERLY MARKED

INSPECT INSTRUMENTS, LINES, FOR SECURITY

CHECK/CLEAN/REPLACE INSTRUMENT FILTER

INSPECT COCKPIT FRESH AIR VENTS/HEATER VENTS FOR OPERATION AND

SECURITY

INSPECT SEATS, SEAT BELTS/SHOULDER HARNESS FOR SECURITY AND

ATTACHMENT

CORROSION

CHECK BALLISTIC CHUTE INSTALLATION PER MANUFACTURER

RECOMMENDATIONS

EMPENNAGE/CANARD

REMOVE INSPECTION PLATES AND FAIRINGS

INSPECT CANARD ATTACH POINTS FOR SECURITY

INSPECT VERTICAL FIN ATTACH POINTS

INSPECT ELEVATOR/STABILIZER ATTACH POINTS

INSPECT HINGES/TRIM TABS/ROD ENDS FOR ATTACHMENT AND FREE PLAY (SLOP)

INSPECT EMPENNAGE/CANARD SKIN FOR DAMAGE/CORROSION

INSPECT ALL CONTROL CABLES, HINGES AND PULLEYS

INSPECT ALL CONTROL STOPS FOR U/L:

CHECK ALL ATTACHMENT POINTS AND CONTROL FOR SAFETY CONDITION

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

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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.

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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.