Fuselage: Tubular structure cleaned, media blasted and inspected via ultrasound and

eddy current testing. Tubes were replaced as necessary per specifications called out in

IAW NAA Drawings. Finished with epoxy primer and paint as needed. Rear fuselage

section was completely disassembled, cleaned and NDT inspected. Parts replaced as

necessary with NOS and new made IAW NAA Drawings. All exterior skin replaced. All

hardware replaced with new. Re-assembled and finished with epoxy primer and paint as

needed.

• Center Section: Completely disassembled, cleaned and NDT inspected. Parts replaced

as necessary with NOS and new made IAW NAA Drawings. Wing attachment angles

NDT performed by Aircraft Inspection Services Inc CRS#N3DR341N under work order

#B20204, all discrepancies with CS angles corrected during inspection and results found

satisfactory. Stress panels were cleaned and NDT inspected and no discrepancies

found. Re-assembled and finished with epoxy primer and paint as needed.

• Landing Gear: Both main and tail wheel assemblies completely disassembled, cleaned

and NDT inspected. Parts replaced as necessary with NOS, new seals and hardware.

Landing gear re-assembled, serviced and finished with epoxy primer and paint as

needed. Wheels cleaned and NDT inspected finished with epoxy primer and paint as

needed. New tires and tubes installed. Solid rear tire installed. Brakes rebuilt with new

hardware and shoes. Installed serviceable hydraulic master brake cylinder

PN:25-33402-30 SN:3052.

• Engine Mount: Installed repaired engine mount PN 23-21901 SN L3489A with new

attach hardware. Repairs performed by Loree Air Inc. CRS#ZUVR061J W.O. #3489.

• Control Group: Control Sticks, Rudder Pedals, Throttle Quadrant, Control Lock, Pulley

Brackets all completely disassembled, cleaned and NDT inspected. Parts replaced as

necessary with NOS and new made IAW NAA Drawings. All hardware replaced with

new. All parts and assemblies re-assembled and finished with epoxy primer and paint as

needed.

• Finishing Group: Seats, Floor Boards, Canopy Assemblies, Fairings, Side Panels. Parts

replaced as necessary with NOS and new made IAW NAA Drawings. All hardware

replaced with new. All parts and assemblies re-assembled and finished with epoxy

primer and paint as needed. Installed 3” Style Military Seat belts PN:3011830 x2 1 ¾”

Shoulder Harness PN:1Y563030-3D x2 Crotch Straps PN:1CS924-D x2.

• Tail Group: The vertical and both horizontal stabilizers were cleaned and NDT

inspected. Parts replaced as necessary with NOS and new made IAW NAA Drawings.

All hardware replaced with new. Assemblies re-assembled and finished with epoxy

primer and paint as needed.

• Control Surfaces: The rudder, both elevators and aileron structures were cleaned and

NDT inspected. Parts replaced as necessary with NOS and new made IAW NAA

Drawings. All hardware replaced with new. Surfaces re-assembled and finished with Poly

Fiber primer as needed. All surfaces Re-covered in Poly Fiber systems IAW Poly FIber

Manual.

• Wing Group: Both wings cleaned and NDT inspected. Wings were opened up for

inspection. Parts replaced as necessary with NOS and new made IAW NAA Drawings.

All hardware replaced with new. Wing attachment angles NDT performed by Aircraft

Inspection Services Inc CRS#N3DR341N under work order #B20204, all discrepancies

with outboard angles corrected during inspection and results found satisfactory. LH &

RH upper wing attachment angles replaced with new ones produced by Aircraft

Extrusions Co. PN C142, Lot#181851-1 WO181851 COC003413 and shaped by Historic
 Aircraft Restoration PTY LTD. Wings re-assembled and attachment angles matched drilled,
debured and installed. Finished with epoxy primer and paint as needed.

• Instruments & Avionics: Instruments panels cleaned and inspected, hardware and tubing

replaced. re-assembled and finished with epoxy primer and paint as needed. The following
overhauled instruments were installed. Overhaul performed by Preferred Avionics and Instruments
LLC CRS#YPCR724X. Altimeters PN:134P SN:122817 WO:6351/ SN:121217 WO:6351.
Airspeed PN:1426-1Z-A1 SN:901 WO:6396 / PN:1426-12H-B1 SN:15604 WO:6401. Manifold
Pressure PN:19191R-A1 SN:122917 WO:6354 / PN:6748-157 SN:AC-42-59192 WO:6354. Tach
PN:8DJ13AFV SN:7081 WO:6353 / PN:8DJ13ABH SN:AF43-1143610 WO:6353. Attitude Gyro
PN:646040 SN:A042249 WO:6352 / PN:646040 SN:85689 WO:0352. CHT PN:17B504B SN:679
WO:6353. Overhaul performed by Keystone Instruments Services Inc. CRS#BX1R050K 3 in 1 engine
gauge PN:AW2 ¾-19 SN:12-416-2 & 12-416-1 WO:12-416-2 & 12-416-1. Repaired by IFL Instruments
CRS#DJSR211D Compass PN:B-16 SN:AF-42-55380 WO:IA32205 SN:AF-43-29226 WO:IA32206.
The following avionics were installed. Transponder GTX327 PN:011-00490-00 SN:83745581 repaired
performed by Nexair Avionics CRS#N40R087B WO:4170. Unit installed into rack PN:115-00285-00.
Installed IAW Garmin I.M. 190-00-187-02 Rev. 02-01-2020. New ACK Technologies Inc A-30 Altitude
Digitizer SN:151281. Installed IAW A30M Revision 06 2/11/2015. Garmin GTR200 SN:2QQ009351
Unit installed into rack 11501878-00. Installed IAW GTR200 IM:190-01553-00 Revision P 12-2020.
Installed new Artex ELT 345 W/antenna PN:8102 SN:31702092. Battery SN:384739-018 and expires on:
Oct 2026. Installed EA Manufacturing LLC. 4.2amp Dual USB panel mounted charging jack. Installed new
CHT Gasket Probe PN:2853 SN:28222. All switches, relays, breakers and wiring were replaced with new.
Installed two RG-25 12V Concord Batteries in series SN:31040918673 and 40918439. Installed new
Voltage regulator PN:J12M24SP.

• Engine: Installed overhauled Wright R-975-28 SN:40426. Cowling was dis-assembled

cleaned and NDT inspected. Parts replaced as necessary with NOS and new made IAW

NAA Drawings. All hardware replaced with new. Cowl re-assembled and finished with

epoxy primer and paint as needed. Fuel Tanks and oil tanks cleaned and inspected for leaks.
Performed a pressure test and passed. Finished with epoxy primer and paint as needed. All fuel and oil lines
were made new. Installed new fuel selector PN:FS30-T6CJ. Installed overhauled wobble pump PN:D-3
SN:46900-1 performed by S&T Aircraft Accessories Inc. CRS#CC2R737K WO:51381.
Installed Airwolf Oil Filter Kit PN:AFC-K015-C. Installed overhauled Oil Cooler PN:U-3160 SN:21670.
Overhaul performed by Pacific Oil Cooler Service Inc. CRS#RF3R813L WO:124315.

• Propeller: Installed overhauled propeller PN:2D30 SN:29969 on this aircraft.
• Accessories: Installed the following accessories on the engine. New Alternator

PN:7555T SN:H-R082436. Modified Propeller governor PN:4M12-P SN:62501

Modifications performed by S&T Aircraft Accessory Inc. CRS#CC2R737K WO:67051.

Overhauled Tach Gen PN:AN5531-2 SN:AF43-1506558 performed by S&T Aircraft

Accessory Inc. CRS#CC2R737K WO:58954.Overhauled Vacuum Pump PN:3P-194-E

SN:DG010271F performed by S&T Aircraft Accessory Inc. CRS#CC2R737K WO:57413.

Aircraft re-assembled, This included the installation of the empennage, wings, fuselage,

landing gear, tail wheel, powerplant, instruments, surface control, furnishings and

electrical. All flight controls rigid with installation on NOS and new made flight control

cables IAW NAA drawings. Cables were pull tested and passed.

Accomplished 100 hour inspection and service this data following restoration.

Work performed in accordance with AC43.13-1B, Illustrated Parts Catalog For NA-64 Series Airplanes,
Preliminary Handbook Of Description & Operation Instructions For The Model NA-64 Yale and with reference
to EO-05-55A-2 Description and Maintenance Instructions (Harvard 2, 2A & 4),EO-05-55A-3 Structural Repair
Manual Harvard,EO-05-55A-4 Illustrated Parts List (Harvard 2, 2A & 4),EO-05-55A-7 Maintenance Schedule
Primary Inspection (Harvard 2, 2A & 4), North American Aviation Report No. NA-5614 Repair Manual Trainer
Airplanes Series AT-6A, AT-6B, AT-6C, SNJ-3 and SNJ-4, NAA Engineering Drawings.

Preformed ground test run of aircraft engine and all installed systems. Aircraft operation was normal with no leaks
detected at this time. Test flight is required in accordance with 14 CFR Part 91.407(b). I certify that this aircraft has
been inspected in accordance with the requirements of a 100 hour inspection and was determined to be in airworthy condition.