Airworthiness Directives (ADs)

Aviation Industry

CAA-2011-05-010

The aircraft owner or operator shall comply with Airworthiness Directives issued by the CAA or the aeronautics authority of the State of Design (SoD) of the aviation products, appliances and parts, and take all necessary actions thereto.

Issue Date: 2011/05/27

Applicability: Tri-Band ELT antennas, Part Number (P/N) 21-41 ( ) series, all serial numbers (s/n) up to 12999 inclusive, which are used in combination with a large variety of ELT units without electro-static discharge (ESD) protection. ESD protection is identified by a declaration of category A of section 25 of RTCA, Inc. DO160 version D change 3 (or later version) or EUROCAE ED-14D (or later version); see also Note below. Chelton P/N 21-41 ( ) series antennas installed in combination with the following ELT units are not affected by this AD:  Chelton Avionics, Inc DBA Wulsberg Electronics (formerly ARTEX) ELT model C406-N HM, P/N 453-5061,  Chelton Avionics, INC DBA Wulsberg Electronics (formerly ARTEX) ELT model C406-N, P/N 453-5060, and ELTA ELT model ADT406²AF/AP-H, P/N 01N65901 rev. (x) The affected antennas are known to be installed on, but not limited to, Eurocopter (formerly Eurocopter France, Aerospatiale) AS 350, EC 155 and AS 332 series helicopters. It is also possible that the antenna is installed on fixed wing aircraft. Note: For the definition of ELT, refer to the types of ELT in EUROCAE ED-62A paragraph 1.2 or in RTCA DO-204 paragraph 2.1. The definition includes all four basic types: ELT (AF) - Automatic Fixed, ELT (AP) - Automatic Portable, ELT (S) - Survival, and ELT (AD) - Automatic Deployable.

Model Number: Chelton Limited P/N 21-41 ( ) series Tri-Band ELT antennas

CAA AD Number: CAA-2011-05-010

Aeronautics Authority of Original AD: EASA

Original AD Number: 2011-0093

Effective Date: 2011/06/03

Subject: Equipment / Furnishings – Emergency Locator Transmitter (ELT) Antenna – Modification / Replacement

Reference Publications (Revision/ATA/SB): ATA 25. Ref. Chelton Limited (trading as Cobham Antenna Systems) SB 02/2011 Issue 1 dated 18 April 2011.

Remarks

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