January 5, 2011 Exemption No. 10189 Regulatory Docket No. FAA-2010-1120

Mr. Jim F. Buehring Chelton Avionics, Inc., dba Wulfsberg Electronics Division

6400 Wilkinson Drive Prescott, AZ 86301

CORRECTED COPY

The FAA is reissuing Exemption No. 10189 to correct an error. The name “Wolfsburg” has been corrected to read “Wulfsberg” and “Wulfsberg Elections Division” corrected to read “Wulfsberg Electronics Division”. Please file this with the original signed Exemption.

Dear Mr. Buehring:

This letter is to inform you that we have gr anted your request for exemption. It transmits our decision, explains its basis, and gives you the condi tions and limitations of the exemption, including the date it ends.

The Basis for Our Decision

By letter dated October 5, 2010, you petitione d the Federal Aviation Administration (FAA) on behalf of Chelton Avionics, Inc ., doing business as Wulfsberg Electronics Division (Wulfsberg), for an exemption from § 21.621 of Title 14, Code of Federal Regulations (14 CFR) to the extent necessary to allow Wulfsberg to continue production and support of Technical Standard Order (T SO) approved articles made by Northern Airborne Technology Ltd. located in Kelown a, Canada. Wulfsberg has acquired all assets of Northern Airborne Technology Lt d. Northern Airborne Technology Ltd., will

be closed and will cease to exist as a legal entity.

A previous exemption (Exemption No. 10081) tr ansferred the approva l of some of the articles produced under a letter of TS O design approval by Northern Airborne Technology Ltd. to Wulfsberg. The current ex emption requests th e transfer of the remaining articles produced by Northern Ai rborne Technology Ltd. to Wulfsberg.

AIR-11-035-EThe FAA has determined that good cause exists for not publishing a summary of the petition in the Federal Register because the requested exemption would not set a precedent, and any delay in acting on this petition would be detr imental to Wulfsberg.

The FAA has issued a grant of exemption in ci rcumstances similar in all material respects to those presented in your petition. In Grant of Exemption No. 10081, the FAA found that regulation from which Wulfsberg seeks re lief was intended to prevent the sale or purchase of production approvals by preven ting the legal transf er of certificate ownership. The rule does not intend to pr event one company from buying another, or from one company assuming majority ownershi p of another. Under these circumstances, safeguards have been established outlin ing the requirements for acquiring and maintaining production approval.

Having reviewed your reasons for re questing an exemption, I find that:

 they don’t differ materially from those pr esented by the petitioner in the enclosed grant of exemption;

 the reasons stated by the FAA for granting th e enclosed exemption also apply to the situation you present; and

 a grant of exemption is in the public interest.

Our Decision

Under the authority contained in 49 U.S.C. 40113 and 44701, which the FAA Administrator has delegated to me, I hereby grant Chelton Avionics, Inc., doing business as Wulfsberg Electronics Division, an ex emption from 14 CFR § 21.621 to the extent necessary to allow Wulfsberg to conti nue production and support of TSO products currently produced by Northern Airborne T echnology Ltd., located in Kelowna, Canada, subject to the conditions and limitations described below.

Conditions and Limitations

Wulfsberg is fully responsible for continue d airworthiness responsibilities, including compliance with 14 CFR § 21.3, for all articles previously manuf actured by Northern Airborne Technology Ltd. that are transfe rred to Wulfsberg under this exemption.

Once TSO authorizations are issued to Wulfsberg under 14 CFR § 21.605, Northern Airborne Technology Ltd. may no longer produce the following models under the TSO letter of design approval issued under 14 CFR § 21.617.

NAT Kelowna Model Description Applicable TSO(s)

903-5223-901 RVR-223, NVIS A, CVR Controller C123a

903-5223-902 RVR-223, NVIS B, CVR Controller C123a

907-1102-122 RGT-102 EGPWS Control Panel,
OVRD/INOP C92c

907-1102-X22 RGT-102 EGPWS Control Panel,
OVRD/INOP C92c

AA20-431 Cabin PA System C50c

AA21-4XX PA/Siren Controller C50cAA30-3XX Custom Switch Panel C139

AA38-3XX Local ICS Loop, 8 place C50c

AMS43 TSO Single Channel Audio Controller
TSO C50c

AA85-001 InterVOX II intercom system, 4/6 Place, Mono C50c

AA95-XXX TSO Single Channel Audio Controller C50c

Once TSO authorizations are issued to Wulfsberg under 14 CFR § 21.605, Northern Airborne Technology Ltd. must formally in form Transport Canada the corresponding letters of TSO design approval are withdrawn by the FAA.

Prior to commencing production of the transf erred articles, Wulfsberg's production and quality system must be re-inspected and approved by the applicab le FAA Manufacturing Inspection District Office (MIDO).

Sincerely,

/s/

Frank P. Paskiewicz Acting Director, Aircraft Certification Service

Enclosure