# STC SA3612NM

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Frontier Flying Service Inc., United States
- Description: Installation of SAFT type 2376 nickel-cadmium battery.
- Applied: April 23, 1986
- Status date: February 4, 2020
- Product: Aircraft, Small Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS A20SO](https://openairdocs.org/tcds/A20SO)
- Certificate PDF: https://openairdocs.org/files/sha256/79/08/790811b0885653879bccd21c7a355a28281f4805093260982fad834530abd972
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/7657B536BF0C56318625852200767D1F.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA3612NM

## ADs that name it (0)

None.

## Approved models (1)

- The New Piper Aircraft Inc. PA-31-350 ([TCDS A20SO](https://openairdocs.org/tcds/A20SO))

## What the certificate says

Read from the PDF's text layer, without the form's printed wording; the layout is lost and the order can differ. The PDF is the record.

Installation of SAFT Type 2376 nickel cadmium battery and Aircraft Instrument and Development, Inc./R.C.

Allen No. 29-450 battery overtemperature warning system kit, modification of airplane electrical system, and fabrication of parts used in performing said modifications, all in accordance with Cape Smythe Air Service, Inc., Descriptive Data List No. 31-001, dated October 22, 1986, or later FAA approved revision.

The approval of this change in type design applies to the basic Piper Model PA-31-350 airplanes, serial number 31-7852080 through 31-7952250, and serial numbers 31-8052001 and up, only. This approval should not be extended to other aircraft of this model on which other previously approved modifications are incorporated unless it is determined by the installer that the modifications will introduce no adverse effect on the airworthiness of such aircraft.

(Limitations and Conditions Continued on Page 3)

Frontier Flying Service, Inc.

4700 Old International Airport Rd Anchorage, AK 99502-1020 Date reissued: February 4, 2020

Date amended: January 23, 1987

(Signature) August A. Asay Manager, Anchorage ACO Branch

(Title) April 23, 1986 October 29, 1986

A20SO Piper PA-31-350

FAA Form 8110-2-1(10-69) Page 3 of 3

October 29, 1986

Limitations and Conditions: (Continued) This determination should include consideration of significant changes in weight distribution such as an increase in the fixed disposable weight in the fuselage.

Piper Model PA-31-350 airplanes modified in accordance with this certificate must be operated in accordance with FAA approved Pilot’s Operating Handbook and Airplane Flight Manual Supplement, Revision 1, dated January 22, 1987, or later FAA approved revision.

## Every issue (1)

- February 4, 2020: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/79/08/790811b0885653879bccd21c7a355a28281f4805093260982fad834530abd972)

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