Yesteryear Aviation

Yesteryear Aviation Owner: Dave Groh Yesteryear Aviation Inc. is located in Mason, Michigan, fifteen miles south of the state capital, Lansing, Michigan.
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Our inventory started with three hundred and fifty drums of surplus aircraft hardware from WWII and the Korean War. We have grown and now produce a smoke system, PMA gaskets for the Continental W670 & Lycoming R680, and PMA T-6 parts. In addition, we build Stearman Model 75 series wood wings, wing kits, and overhaul W-670 engines. Our hardware inventory includes a wide variety of bolts, clamps, Dz

us fasteners, nut plates, plumbing fittings, bearings, primer fittings, and prop bolts, plus many “out of production” items. We are not able to include the entire inventory on our website. If you are in need of a specific part that is not listed, please call!

All new stringers now in place. Drilling rib brackets to stringer rivet holes. Getting close to putting heavy top skin i...
05/19/2026

All new stringers now in place. Drilling rib brackets to stringer rivet holes. Getting close to putting heavy top skin in place.

Laying out new leading edge ribs and stringers on center section.
05/01/2026

Laying out new leading edge ribs and stringers on center section.

Front main spar for Snj center section riveted up. Started assembly into the center section today. More riveting ahead.
04/28/2026

Front main spar for Snj center section riveted up. Started assembly into the center section today. More riveting ahead.

Front spar riveting nearly done. Squeezer has been busy putting in all these rivets.
04/21/2026

Front spar riveting nearly done. Squeezer has been busy putting in all these rivets.

New surplus pin cleaned and ready to press into place
04/21/2026

New surplus pin cleaned and ready to press into place

04/21/2026

Main gear pivot pins pressed out of castings. One pin bent around .009”. Needed replacing with new pin. The other pin ran within .0005” of straight.

Cleaning out chips and removing burrs from drilling. About ready to start riveting front spar.
04/08/2026

Cleaning out chips and removing burrs from drilling. About ready to start riveting front spar.

Front spar assembly has begun.
03/26/2026

Front spar assembly has begun.

Rebuilding front main spar on Snj center section. New upper spar cap along with main web and original doublers. It’s a...
03/21/2026

Rebuilding front main spar on Snj center section. New upper spar cap along with main web and original doublers. It’s almost all apart. Start cleaning and chromate parts before reassembly.

Next phase of center section restoration. Fuel tank ribs removed along with gear castings. Front main spar removed also...
03/07/2026

Next phase of center section restoration. Fuel tank ribs removed along with gear castings. Front main spar removed also. Next will be front ribs removed. Strip main spar, chromate install new top spar cap. All front ribs will be replaced with new surplus.

Address

4322 Curtice Road
Mason, MI
48854

Opening Hours

Monday 9am - 5pm
Tuesday 9am - 5pm
Wednesday 9am - 5pm
Thursday 9am - 5pm
Friday 9am - 5pm

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