Dip Davis Cowl Latch STC for the Cessna 120/140/

Less Maintenance!

Uses Same Cowl Openings!

More Secure than Original!

Easy to return to Original if desired!

Dip Davis Cowl Latch STC for Cessna 120/140/140A/170/170A/170B

The cowl latches (4 per aircraft) installed on Cessna 120, 140, 140A, 170, 170A and the 1952 version of the 170B were a trunk latch type device consisting of a two component catch assembly riveted to the upper cowl door and an eight component latch assembly riveted to the lower section. Security of closure depended upon a very slightly over center toggle action and a spring clip that retained the handle. As the components wore and spring tension deteriorated, owners and maintenance personnel have sometimes added tabs drilled for safety pins or simply drilled holes in the handle for the inclusion of sheet metal screws to keep the handle in place. Replacement assemblies are available at over $260 per latch…. 
That is over $1000 per airplane!

The replacement latch we offer consists of a three component upper latch and a two component receptacle for the lower cowl utilizing a standard Camloc fastener. It installs in the cowling in the same openings as the original, using the same rivet holes. Should someone later, in the interest of retaining authenticity, wish to reinstall the original style latch, he may do so by simply removing the rivets and replacing the latch assemgly. No modification of the cowl proper is required.

The replacement latch is available with either a ‘wing’ type fastener, a Phillips head fastener, or a Slotted head fastener.

The replacement latch not only saves three quarters of the expense involved, but also actually provides a more secure closure than the original.

PRICE: The cost is $250 US per set of four (4) Wing type fasteners and only $230 US per set of four (4) Phillips head or Slotted head fasteners and is postpaid. If you are from Canada, we request payment be either PayPal or International Money Order.

Order the Kit & STC

The Dip Davis Cowl Latch STC gives you the authority to install one set of Dip Davis Cowl Latches on one specific Cessna 120, 140, 140A, 170, 170A or 170B. This is a one time use STC, is N number specific and is NOT transferable. 

The STC includes new cowl latches, paperwork and installation instructions for the install.

The cost is US$250 per set of four (4) Wing type fasteners and is postpaid.

 The cost is only US$230 per set of four (4) Phillips head OR Slotted head fasteners and is postpaid.

After you submit the order , you can either send a check for the STC or pay using paypal. If you are from Canada, we request payment be either PayPal or International Money Order. Directions for payment will also appear after the form has been submitted.

If the form does not work out,  Please send us an email using this link:


Please include the following: Your Name and address, Phone number and email address,
The N number of the plane the Cowl latches will be installed on,
Shipping address if different than the registered address of the airplane,
What type of cowl latches you would like: Wing, Slotted or Phillips Head.

Be sure to include your contact information so we can get ahold of you for any questions.


After you contact us, we will let you know payment information.


Contact Information

The Cowl with the original latch removed.

Dip Davis Cowl latch Installed.

Lower section of the cowl latch installed.

Top portion of cowl latch installed.

Both latches installed.

Latch Open.