IRWORTHINESS COMPLIANCE CHECKLIST #6: Installation of non-aviation
enviroNment radio equipment

I HAVE DETERMINED THE PLANNED ALTERATION TO BE IN COMPLIANCE WITH
PARAGRAPH C, CHECKLIST APPLICABILITY.

IA SIGNATURE DATE

AIRCRAFT MAKE MODEL

SERIAL \# N#

TABLE 1-1. Installation of Non-aviation Environment Radio Equipment -
Checklist Qualifications for DER Data Review

<table>
<colgroup>
<col style="width: 8%" />
<col style="width: 5%" />
<col style="width: 9%" />
<col style="width: 5%" />
<col style="width: 9%" />
<col style="width: 6%" />
<col style="width: 5%" />
<col style="width: 29%" />
<col style="width: 6%" />
<col style="width: 6%" />
<col style="width: 6%" />
</colgroup>
<tbody>
<tr class="odd">
<td rowspan="2">Item [1] Completed Initials</td>
<td colspan="3"><p>Planned FAA Approval Method</p>
<p>Pick 1, [2]</p></td>
<td rowspan="2"><blockquote>
<p>Subject Evaluated</p>
</blockquote></td>
<td rowspan="2"><blockquote>
<p>(14 CFR)</p>
</blockquote></td>
<td rowspan="2"><blockquote>
<p>(CAR)</p>
</blockquote></td>
<td rowspan="2"><p>Item to Consider</p>
<p>or</p>
<p>Intent of the regulation</p></td>
<td rowspan="2">DER Authority [3] (ref. 8110.37</td>
<td colspan="2">Other Guidance</td>
</tr>
<tr class="even">
<td><p>DER</p>
<p>8110-3</p></td>
<td>FSDO ASI, 337, Block 3</td>
<td>Other (AC 43.13)</td>
<td><p>AC</p>
<p>Orders</p>
<p>Policy</p></td>
<td>AC 43-13-1B/2A</td>
</tr>
<tr class="odd">
<td></td>
<td></td>
<td></td>
<td></td>
<td>Loads</td>
<td>23.301</td>
<td>3.171</td>
<td><ul>
<li><p>Limit load is maximum in service</p></li>
<li><p>Analysis to LIM must produce no yield.</p></li>
</ul></td>
<td></td>
<td></td>
<td></td>
</tr>
<tr class="even">
<td></td>
<td></td>
<td></td>
<td></td>
<td>Factor of Safety</td>
<td>23.303</td>
<td>3.172</td>
<td><ul>
<li><p>Ultimate = Limit load * 1.50 (50% margin of safety)</p></li>
</ul></td>
<td></td>
<td></td>
<td></td>
</tr>
<tr class="odd">
<td></td>
<td></td>
<td></td>
<td></td>
<td>Strength and deformation</td>
<td>23.305</td>
<td>3.173</td>
<td><ul>
<li><p>Load test to Limit is okay structure not deform
permanently.</p></li>
<li><p>DO NOT TEST TO ULTIMATE conditions for flight test article. If
tested to ultimate conditions the article must be thrown out or be
tested to verify integrity.</p></li>
</ul></td>
<td></td>
<td></td>
<td></td>
</tr>
<tr class="even">
<td></td>
<td></td>
<td></td>
<td></td>
<td>Proof of Structure</td>
<td>23.307</td>
<td>3.174</td>
<td><ul>
<li><p>Limit loads are determined by flight manual, gust and landing
loads. For lack of this data the loads from 23.561 may be used (but not
required).</p></li>
</ul></td>
<td></td>
<td></td>
<td></td>
</tr>
<tr class="odd">
<td></td>
<td></td>
<td></td>
<td></td>
<td>Design and Construction, General</td>
<td>23.601</td>
<td>3.291</td>
<td><ul>
<li><p>The suitability of each questionable design detail and part
having an important bearing on safety in operations, must be established
by tests.</p></li>
</ul></td>
<td></td>
<td></td>
<td></td>
</tr>
<tr class="even">
<td></td>
<td></td>
<td></td>
<td></td>
<td>Materials and Workmanship</td>
<td>23.603</td>
<td>3.292</td>
<td><ul>
<li><p>All materials must meet suitable specifications.</p></li>
</ul></td>
<td></td>
<td></td>
<td></td>
</tr>
<tr class="odd">
<td></td>
<td></td>
<td></td>
<td></td>
<td>Inspection Provisions</td>
<td>23.611</td>
<td>3.296</td>
<td><ul>
<li><p>Inspection and servicing must be accomplished in an appropriate
manner.</p></li>
<li><p>Are reasonable means provided for inspection and
servicing.</p></li>
</ul></td>
<td></td>
<td></td>
<td></td>
</tr>
<tr class="even">
<td></td>
<td></td>
<td></td>
<td></td>
<td>Function and Installation</td>
<td>23.1301</td>
<td>3.652,</td>
<td><ul>
<li><p>Additional equipment installed (per operating rules) must meet
intended function.</p></li>
</ul></td>
<td></td>
<td></td>
<td></td>
</tr>
<tr class="odd">
<td></td>
<td></td>
<td></td>
<td></td>
<td>Electrical system capacity</td>
<td>23.1351</td>
<td>3.636(b),</td>
<td><ul>
<li><p>Each electrical system must be adequate for the intended
use.</p></li>
<li><p>Electric power sources, their transmission cables, and their
associated control and protective devices, must be able to furnish the
required power at the proper voltage to each load circuit essential for
safe operation</p></li>
</ul></td>
<td></td>
<td></td>
<td></td>
</tr>
<tr class="even">
<td></td>
<td></td>
<td></td>
<td></td>
<td>Circuit protective devices.</td>
<td>23.1357</td>
<td><p>3.690</p>
<p>3.691</p>
<p>3.692</p></td>
<td><ul>
<li><p>A protective device for a circuit essential to flight safety may
not be used to protect any other circuit.</p></li>
<li><p>If the ability to reset a circuit breaker or replace a fuse is
essential to safety in flight, that circuit breaker or fuse must be so
located and identified that it can be readily reset or replaced in
flight.</p></li>
<li><p>e) For fuses identified as replaceable in flight--<br />
(1) There must be one spare of each rating or 50 percent spare fuses of
each rating, whichever is greater; and<br />
(2) The spare fuse(s) must be readily accessible to any required
pilot.]</p></li>
</ul></td>
<td></td>
<td></td>
<td></td>
</tr>
<tr class="odd">
<td></td>
<td></td>
<td></td>
<td></td>
<td>Electric cables and equipment.</td>
<td>23.1365</td>
<td>3.693</td>
<td><ul>
<li><p>Each electric connecting cable must be of adequate
capacity.</p></li>
<li><p>Any equipment that is associated with any electrical cable
installation and that would overheat in the event of circuit overload or
fault must be flame resistant. That equipment and the electrical cables
must not emit dangerous quantities of toxic fumes.</p></li>
<li><p>Cables should meet MIL-DTL-27500 or Equivalent
specification</p></li>
</ul></td>
<td></td>
<td></td>
<td></td>
</tr>
</tbody>
</table>

TABLE 1-2. DER Signatures

**a. Checklist Table.** This checklist is issued for guidance purposes
to help show completeness of documentation for the FAA field approval
and return to service process. The checklist is intended to provide
guidance information during the process of approving the installation of
non-aviation environment radio equipment and then returning the airplane
to service. An airplane modification is eligible to use this checklist
when it has met the requirements outlined in paragraph 8 of this AC.

**b. Approval.** Modifications meeting the scope described in paragraph
c may be approved by using this checklist and completing FAA Form 337.
The IA can approve this modification and the airplane incorporating it
for return to service using DER data entirely approved by completing
Block 7, "Approval for Return to Service" of FAA Form 337. The FAA usage
of Block 3, "For FAA Use Only" will not be required to accomplish this
checklist for modifications, which falls within the scope of paragraph c
providing that no data approval is required by AFS/ASI.

**c. Airworthiness Compliance Checklist Applicability.** This checklist
is to be used only on repairs or alterations to:

-   Airplanes 6,000 pounds or less maximum gross weight

-   Airplanes having a single, naturally aspirated reciprocating piston
    engine

-   Unpressurized airplanes.

**d. Checklist Use.** Inspect the alteration criteria and examine its
supporting data to verify that they meet the following criteria:

**(1)**

**(2)** Appropriate operations advisory information should be included
in the Aircraft Flight Manual (AFM) of Flight Manual Supplement (FMS).

> **NOTE 1**
>
> This checklist is not applicable to modifications requiring revision
> of the FAA approved Limitations section of the AFM or FMS. Please
> contact FAA Flight Standards District Office (FSDO) or Aircraft
> Certification Office (ACO) representatives for modifications requiring
> revision of the Limitations section. However, in accordance with
> 14 CFR, part 23, § 23.1581 (b)(2)(ii), Operational advisory
> information as prescribed in §§ 23.1585 through 23.1589, may be
> inserted into the AFM or FMS in a manner acceptable to the
> administrator. The FAA has determined that, for modifications within
> the scope described on this checklist, operational advisory
> information can be inserted into the AFM or FMS if it is determined to
> be acceptable by the IA. The IA\'s finding should include
> consideration of information provide by applicable equipment
> manufactures, if available.

**(3)** The circuit breaker panel or electrical panel must be as readily
accessible and visible to the pilot in its new location as it was in its
previous location. It should comply with 14 CFR, part 23, § 23.1357,
CAR, § 3.691.

**(4)** Any additional Instructions for Continued Airworthiness (ICA)
are properly documented per 14 CFR, part 23, § 23.1529 requirements.

# e. Necessary Approvals.

**(1)** DER\'s should initial all applicable items in Table 1-1,
"Checklist and Qualifications for DER Data Review".

**(2)** DER\'s should sign the table in Table 1-2, "DER Signatures".

**(3)** DER\'s show evidence of DER authority as required in paragraph
g.

**(4)** DER\'s show compliance to any additional DER identified
requirements in

Table 1-1.

**(5)** DER\'s selects and identifies applicable regulations based on
certification basis of airplane.

**(6)** When all FAA Form 8110-3\'s are complete, give originals along
with the completed FAA Form 337 to local FSDO office.

**(7)** An ACO Engineer or FSDO Inspector may sign in place of any DER
signature.

**(8)** When indicated on individual checklists A & P and IA\'s
signatures can be substituted

**f. Applicable Guidance Material.**

**g. Evidence of DER Authority to Approve.**

h.  **Complete Checklist Process.** Send a copy of the completed
    checklist and reporting data to the local FSDO office which will, in
    turn, forward it to the FAA Aircraft Registration Branch, Oklahoma
    City, Oklahoma, for inclusion in the aircraft record. Submit
    originals to the aircraft owner or operator to be kept with the
    aircraft records.