STC MOD FACT SHEET
One-Piece “Strapless” Windshields
|Models:||Early Cessna 310 and 320|
|Purpose:||Removes Center Strap Visual
obstruction on all early models,
and increases thickness on the
earliest 310 models to .250″ (1/4″).
Models / Part Numbers:
|Cessna 310 (35000 through S/N 35546)||P/N
536/CON or 536/CMB
|Cessna 310 (35547 through S/N 310K0245)||P/N 336/CON
|Cessna 320 (through S/N 320D0130)||P/N 336/CON or 336/CMB|
The Original Design: On the earliest aircraft that were factory equipped with 1/8″ windshields, the strap added
strength. The strap was apparently a carry-over of the original design when Cessna upgraded to 1/4″ windshields starting
with 310 Serial No. 35547. The 320 was always equipped with a 1/4″ windshield. Starting with the Cessna 310L in 1967,
Cessna used a one-piece “strapless” windshield as original factory equipment.
The LP Aero Plastics, Inc. Mod: The LP Aero STC Conversion removes the center strap visual obstruction,
and is actually a quite straightforward installation. The new windshield is installed exactly as the old one with the exception
that the center strap is not replaced. All conversion windshields are .250″ (1/4″) thick.
Competitive Information: One competitor manufactures a similar STC’d windshield for the Cessna 320 aircraft
and for models 310B and later, but does not include the 1956 and 1957 Cessna 310 models.
Options Available: The “CON” windshields provide no mount for the compass. If the current
compass is located on the center strap, it must be relocated to the glareshield (P/N LP-081 Glareshield Compass Mount
can be used – see figure 1) or to the instrument panel. Relocation is sometimes difficult because the compass may not
“swing” or perform accurately when mounted close to other instrumentation or avionics equipment. It is best to temporarily
relocate the compass and evaluate its performance before ordering a “CON” windshield.
The “CMB” windshields are equipped with a bonded compass mount block as was standard equipment
on the later 310 and 320 aircraft. The existing aircraft compass most likely cannot be used unless a new bracket is
fabricated to match the screw points on the compass mount block, as the mount block is set up for the late-model
310 / 320 housing and compass. The compass mount block can be added to the “CON” windshield in the field but
bonding is difficult with the windshield mounted in the aircraft. Part numbers SP-CMKT and SP-CHKT
compass kits will not work with this compass mount block.
As with all LP Aero Plastics Windshields and Windows, Clear, Green, and Solar Gray tints are available. (rev 5/23/07)