# STC SA03971AT - Type: Supplemental type certificate - Status: Current, Issued - Holder: Concorde Battery Corporation, United States - Description: Replace NiCd battery with Lead Acid battery on Viking Air Limited DHC-6-1, DHC-6-100, DHC-6-200 and DHC-6-300 and associated hardware - Applied: June 22, 2011 - Status date: June 19, 2012 - Product: Aircraft, Small Airplane - Certification basis: Part 21, Part 23, Part 26 - Data sheets: [TCDS A9EA](https://openairdocs.org/tcds/A9EA) - Certificate PDF: https://openairdocs.org/files/sha256/a1/52/a152b4a0e637a0e8742b83c4cd962f9d25e7235edce3c322e9ef6accef3c699e - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/DF11AD4FC137061E86257A45006F5212.0001 - DRS record last changed: December 6, 2025 - Page: https://openairdocs.org/stc/SA03971AT ## ADs that name it (0) None. ## Approved models (4) - Viking Air Limited DHC-6-1 ([TCDS A9EA](https://openairdocs.org/tcds/A9EA)) - Viking Air Limited DHC-6-100 ([TCDS A9EA](https://openairdocs.org/tcds/A9EA)) - Viking Air Limited DHC-6-200 ([TCDS A9EA](https://openairdocs.org/tcds/A9EA)) - Viking Air Limited DHC-6-300 ([TCDS A9EA](https://openairdocs.org/tcds/A9EA)) ## 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. Part 23 of the Federal Aviation Regulations. Description of Type Design Change: Replace NiCd battery with Lead Acid battery on Viking Air Limited DHC- 6-1, DHC-6-100, DHC-6-200 and DHC-6-300 and associated hardware in accordance with Master Drawing List 5-0398 Revision E, dated May 4, 2012 or later FAA approved drawing revisions. Limitations and Conditions: This approval should not be extended to other aircraft of this model on which other previously approved modifications are incorporated, unless it is determine by the installer that the interrelationship between this change and any other previously approved modifications will produce no adverse effect upon the airworthiness of that airplane. If the holder agrees to permit another person to use this certificate to alter the product, the holder shall give the other person written evidence of that permission. Concorde Battery Corporation 105 Fox Lake Court Winston Salem, NC 27106 A9EA Make : Viking Air Limited DHC-6-1, -100, -200, -300 Model : Date of application: June 22, 2011 Date of issuance: June 19, 2012 ( Signature) Melvin D. Taylor Manager, Atlanta Aircraft Certification Office ( Title) FAA FORM 8110-2-1(10-69) PAGE 2 of 2 PAGES Number SA03971AT Instructions for Continued Airworthiness (ICA), Concorde Battery Corporation No. 5-0446, Rev. NC, dated September 29, 2011, or later FAA accepted revision must be made available to the operator at the time of installation. Based on 14 CFR §§ 21.115 and 21.101, and the FAA policy for significant changes in FAA Order 8110.48, the certification basis for the Viking Air Limited DHC-6 series aircrafts is as follows: a. The type certification basis for Viking Air Limited DHC-6-1, DHC-6-100, DHC-6-200 and DHC-6-300 airplanes is shown on TCDS A9EA for parts not changed or not affected by the change. b. The certification basis for parts changed or affected by the change since the reference date of application, June 22, 2011 is based upon part 23 as amended by Amendment 23-59. Based on 14 CFR §§ 21.115 and 21.101, and the FAA policy for significant changes in FAA Order 8110.48, the certification basis for this modification was determined to be: Regulations at the latest amendment 23-0 through 23-59 23.1529 Regulations at an intermediate amendment Regulations at the amendment level in TCDS A9EA CAR 3 3.171, 3.172, 3.173, 3.174, 3.292, 3.293,3.294, 3.295, 3.301, 3.302, 3.303, 3.305, 3.306, 3.307, 3.636(b), 3.682 14 CFR Part 26 Regulations Based on 14 CFR §21.101(g), applicable provision of 14 CFR part 26 are included in the certification basis. For any future 14 CFR part 26 amendments, the holder of this STC must demonstrate compliance with the applicable sections. As of the issuance date of this STC, compliance has been found for the following regulation: 14 CFR §26.11. --------------------------END--------------------------- ## Every issue (1) - June 19, 2012: Issued, Current. [certificate](https://openairdocs.org/files/sha256/a1/52/a152b4a0e637a0e8742b83c4cd962f9d25e7235edce3c322e9ef6accef3c699e) --- OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.