Airworthiness Directive · Amendment 39-18910 · Atc transponder system
NavWorx, Inc. Automatic Dependent Surveillance Broadcast Universal Access Transceiver Units
This AD applies to the following NavWorx, Inc., Automatic Dependent Surveillance-Broadcast (ADS-B) Universal Access Transceiver units (unit) installed on aircraft certificated in any category, including experimental:
(1) Model ADS600-B part number (P/N) 200-0012;
(2) Model ADS600-B P/N 200-0013; and
(3) Model ADS600-EXP P/N 200-8013.
We are adopting a new airworthiness directive (AD) for NavWorx, Inc. (NavWorx), Automatic Dependent Surveillance Broadcast (ADS-B) Universal Access Transceiver Units (unit). This AD requires removing, disabling, or modifying the ADS-B unit. This AD was prompted by a design change that results in the unit communicating unreliable position information. The actions in this AD are intended to address an unsafe condition on these products.
You are responsible for performing each action required by this AD within the specified compliance time unless it has already been accomplished prior to that time.
(1) Within 6 months, comply with either paragraph (e)(1)(i), (ii), (iii), or (iv) of this AD:
(i) Remove the ADS-B unit.
(ii) Disable and prohibit use of the ADS-B unit as follows:
(A) Pull and secure the circuit breaker and disconnect the internal GPS antenna connector from the ADS-B unit and secure.
(B) Install a placard in view of the pilot that states “USING THE ADS-B SYSTEM IS PROHIBITED.”
(C) Revise the Limitations section of the Aircraft Flight Manual supplement (AFMS) by inserting a copy of this AD or by making pen-and-ink changes to add the following: “USING THE ADS-B SYSTEM IS PROHIBITED.”
(iii) Revise the software so the ADS-B unit broadcasts a SIL of 0.
(iv) Couple the ADS-B unit with an approved external GPS as follows:
(A) Interface the ADS-B unit with an Accord NexNav mini LRU GPS Receiver P/N 21000.
(B) Revise the Limitations section of the AFMS by inserting a copy of this AD or by making pen-and-ink changes to add the following: “OPERATION USING THE INTERNAL POSITION SOURCE IS PROHIBITED. USE OF THE ACCORD NEXNAV MINI P/N 21000 EXTERNAL POSITION SOURCE IS REQUIRED.”
(2) After the effective date of this AD, do not install an ADS-B unit Model ADS600-B P/N 200-0012, Model ADS600-B P/N 200-0013, or Model ADS600-EXP P/N 200-8013 on any aircraft unless you have complied with the requirements of paragraph (e)(1)(ii), (e)(1)(iii), or (e)(1)(iv) of this AD.
The aircraft, engines and makers this AD names, by the model designations in its text. A model listed here may still be outside the AD's serial ranges.
