Part# 11-03171
MFR Model# A-510-5K


Model No.
Includes ignition switch without starter position, two aircraft locks (one door and one baggage lock)* and two keys mated to ignition switch and locks. (Diode not required) A-510-5K 11-03171
Includes ignition switch with starter position, two aircraft locks (one door and one baggage lock)* two keys mated to ignition switch and locks . (diode included) A-510-2K 11-03172

Made in USA

These fine quality switches are being used in many aircraft. The switch housing is now machined from billet aluminum which makes this switch 25% lighter. A-510-2 Ignition Switch is PMA'd, door and baggage locks are not.

Multiple ignition switches & lock sets are available with the same key. This is a special order and extra charges & lead times will apply. Please call sales for a price & lead time.
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Works great

Gregory H Verified Purchase


November 15, 2022

Works great

Rick L
December 11, 2020

Did the job for the school projects.

Ed B
August 26, 2020

Very nice ignition switch. Replaced original switch in my Beech 35-B33 perfectly. Door lock was somewhat an ordeal, but was able to make work with modifications.

Jim C
February 12, 2020

September 24, 2018

Used on 172M. The ignition switch is 5 stars, machined, not die-cast body. If the contacts ever wear, its rebuildable with a cheap kit from ACS. The cylinders fit the holes in the baggage and pilots door, but the cams(what some call lever arms) are flat, straight generic ones. I bought several generic National brand cams from my locksmith for fabricating new cams. The baggage lock required a longer cam with a finger welded on the end at about 120 degrees. The pilots door cam needed a dogleg offset toward the door skin. Double-cut key blank is Ilco X132.

Bob W
February 18, 2022

Switch well made, clearly higher quality locking mechanism than original. The extra locks that are supposed to be replacements for the luggage and left-side door require a bit of effort to adapt. I was successful in the end and am glad for the purchase. The trick is to attach the arm from the original locks to the new locks arm. I did so with a couple of #6 machine screws after drilling and taping the new locks arm. The original locks arm will have to be shortened a bit as well. Works fine, but did take a few hours of tinkering.

Leon L
April 26, 2020

Mag switch is a perfect match for the original. No issues with install. Door locks have very different locking arms than the original. They required cutting and welding. Easily done with a hacksaw and TIG welder.

March 12, 2020

Like a previous review, the door locks DO NOT work for Cessna 172. Ignition switch itself is fine. Now we have to have an addition key, ignition and doors.

Ted C
September 1, 2018

Nice easy installation on the ignition switch. I have a PA-28-201T and I noticed that both door latches needed a modification to make them work. Satisfied but not fully.

James B
December 4, 2017


Please note, Aircraft Spruce's personnel are not certified aircraft mechanics and can only provide general support and ideas, which should not be relied upon or implemented in lieu of consulting an A&P or other qualified technician. Aircraft Spruce assumes no responsibility or liability for any issue or problem which may arise from any repair, modification or other work done from this knowledge base. Any product eligibility information provided here is based on general application guides and we recommend always referring to your specific aircraft parts manual, the parts manufacturer or consulting with a qualified mechanic.

Q: Is the faceplate With start (P/N 11-03667) included in A-510-2K kit?

Per the supplier: Yes, the faceplate is included.

Q: Is this STC'd for the Cessna 150 and 172 as well? Is the STC Copy available?

The A-510-2 ignition switch is PMA'd for the C-150 and C-172. The door and baggage locks are not. Please review the PMA pdf which is located in the "Documents" tab of the web page to verify your serial number is covered.

Q: What are the overall and grip lengths of the door and baggage lock bodies? Can a third lock be added for a second door?

Total length of the lock is approximately 15/16" length (not including screw and washer on end). Max diameter of threaded portion is approx. 3/4". Max diameter of visible portion is approx. 7/8". You would have to special order 11-03172 with 11-01600 keyed together. This would give you 4 total locks. A sales rep can help you with this order.

Q: What are the hole dimensions and keep-away dimensions for the ignition switch?

The thread OD is 7/8. There is a drawing showing how to cut the key way under part number 11-03170.

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