KMC Controls rc allen RCA22 Series Installation & Operation Manual page 11

APPENDIX A
Instructions for Continued Airworthiness
Document Number: ICA19.002 Rev A
Equipment/Model Number: RCA22 series
Equipment Description: Vacuum Horizon Indicator
1. Description
This document describes the necessary maintenance requirements and instructions necessary to
ensure the continued airworthiness of aircraft/rotorcraft with the RCA22 series Vacuum Horizon
Indicators installed.
2. Operation
Operating Instructions for the RCA22 series are detailed in the following document:
Kelly Manufacturing Company Operation/Installation Guide (Publication No. 1405)

3. Equipment Certifications
FAA TSO-C4c

3. Servicing
No scheduled service required
4. Maintenance Instructions
Every 12 months:
Check that the RCA22 Vacuum Horizon is responding properly and operating within the guidelines
detailed in Kelly Manufacturing Company Publication No. 1405. Also verify the following
Failure flag (when applicable) is pulled out of view when vacuum is applied and drops down

into view when vacuum is shut off.
Every 24 months:
Check functional indication accuracy
Note: Indication accuracy can be verified in flight test using the following procedure:
After take-off and before IFR situations perform two turns in opposite directions of at least

15 degrees.
Return aircraft to level flight/cruising speeds for a minimum of 2 minutes.

Verify the RCA22 indicates level in pitch and roll within two degrees.

Service is required if the RCA22 does not pass this flight test. Instrument service can be performed at
Kelly Manufacturing Company
Airworthiness Limitations
There are no airworthiness limitations for the RCA22 series
Reference section 3.3 of Kelly Manufacturing Company Publication 1405.
Rev A January 16, 2019
Rev B
RCA22 Series Installation/Operation Guide
AS369B

service@kellymfg.com
KMC Publication No. 1405
KMC
KELLY MANUFACTURING COMPANY
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