Lower engine mount strengthening layers

Cut 10 strips 1100mm long of 410gsm cloth 140mm wide.
Cut 10 strips 750mm long of 410gsm cloth 140mm wide.
Cut 10 strips 1100mm long of 500gsm UD cloth 140mm wide (UD strips are cut using a sharp blade between the roving bundles).
Cut 10 strips 750mm wide of 500gsm UD cloth 140mm wide
Above cutting list is enough for both lower engine mount points (share between left and right)

Mix about 300g of resin at a time or a bit less if weather is warm (to avoid exotherm) and using a brush and squeegee laminate as follows:

All layers go up onto the firewall plywood by 100mm.
Start with the long strips first.
Alternate between UD and 410
Shorter strips last
Finish with a layer of peel ply
Strips pass just outboard of gear cutouts and kink slightly at this point to become parallel to longitudinal axis of aircraft. Squegee out all bubbles and work slowly to avoid any dry spots.

Make sure that the lower fuselage is not deformed at all during curing...support it aft of the area where the strips go.

All "resin" mentioned in this manual is either Ampreg 22 (mix ratio 100:28) or Ampreg 21 (mix ratio 100:33). Both come with different cure rate hardeners. Typically "extra slow" is used for very thick lay ups such as spar caps and "slow" or "standard" is used elsewhere. "Fast" is only used for small tacking jobs and mixing filler (microballoons).