Unapproved Parts Notification
Date: May 16, 2012
Subcomponents and brackets produced by Chelton Avionics, Inc. (dba Wulfsberg Electronics
Division) Emergency Locator Transmitters (ELTs) (See parts list ).
This notification advises all aircraft owners, operators, manufacturers, maintenance
organizations, and parts distributors regarding ELT subcomponents and brackets produced
without Federal Aviation Administration (FAA) production approval.
Information received during a FAA suspected unapproved parts investigation (SUP),
confirmed that Chelton Avionics, Inc. (dba Wulfsberg Electronics Division) sold ELT
subcomponents without FAA approval between June 2010 and April 15, 2011 to 29 customers.
Additionally, Chelton Avionics, Inc. (dba Wulfsberg Electronics Division) sold ELT brackets
without FAA approval between September 9, 2010 and November 17, 2010 to one customer.
Chelton Avionics, Inc. (dba Wulfsberg Electronics Division) is located at the following
physical address: 6400 Wilkinson Drive, Prescott, AZ 86301. Artex Aircraft Supplies
previously held FAA Technical Standard Order Approval (TSOA) for the parts listed below.
Regulations require that type-certificated products conform to their type design. Aircraft
owners, operators, maintenance organizations, and parts distributors are encouraged to inspect
their aircraft, aircraft records, and/or parts inventories for unapproved ELT subcomponents
and brackets installed on aircraft. Appropriate action should be taken to remove them from
service. If unapproved ELT subcomponents and brackets are found in existing inventory, it is
recommended that they be quarantined to prevent installation.
You can obtain further information concerning this investigation, and guidance regarding the
above-referenced SUP from the FAA Manufacturing Inspection District Office (MIDO) listed
below. In addition to compliance with the above recommendations, we would appreciate any
information concerning the discovery of Chelton Avionics, Inc. (dba Wulfsberg Electronics
Division) ELT subcomponents and brackets from any source, the means used to identify the
source, and the action taken to remove them from service.
This notification originated from the FAA Phoenix MIDO, 17777 N. Perimeter Dr., Suite 103,
Scottsdale, AZ 85255, Telephone (480) 419-0330 Ext. 244, Fax (480) 419-0880.