Today, the FAA issued Unapproved Parts Notice (2023-AAE-EHL-20221214-460) for certain Rockwell Collins Traffic Collision Avoidance System (TCAS) Transmitters/Receivers that were sold by Aviation Parts, LLC of Moscow, Russia. The FAA said that the parts were sold with counterfeit identification plates.
The known affected units are TTR-921 TCAS Transmitter/Receivers with part numbers shown in the table below:
| Article Nomenclature | Article Number |
| TTR-921 TCAS Transmitter/Receiver | 822-1293-001 |
| TTR-921 TCAS Transmitter/Receiver | 822-1293-002 |
| TTR-921 TCAS Transmitter/Receiver | 822-1293-003 |
| TTR-921 TCAS Transmitter/Receiver | 822-1293-033 |
| TTR-921 TCAS Transmitter/Receiver | 822-1293-320 |
| TTR-921 TCAS Transmitter/Receiver | 822-1293-321 |
| TTR-921 TCAS Transmitter/Receiver | 822-1293-322 |
| TTR-921 TCAS Transmitter/Receiver | 822-1293-332 |
The FAA refers to these as “counterfeit TCAS Transmitter/Receiver units.” The FAA explains that their Suspected Unapproved Parts (SUP) investigation began in December, 2021. The investigation revealed that Aviation Parts, LLC, located in Moscow, Russia, sold two TCAS Transmitter/Receivers part number 822-1293-033 (TTR-921) that were advertised as overhauled, when in fact they were inoperable.
Since the initial investigation, the FAA has received additional reports concerning TCAS units with counterfeit identification plates. The FAA reports that when tested, none of these TCAS
units were operable.
Based on these facts, the FAA has recommended that the industry examine its aircraft parts inventory for any of these TCAS articles that have been distributed by Aviation Parts, LLC of Moscow Russia. If such articles are found within an existing inventory, the FAA recommends that they be quarantined to prevent installation until a determination can be made regarding their eligibility for installation.
For more information, or to report the discovery of any of the above-referenced units, you can contact the FAA’s Special Emphasis Investigations Team (SEIT):
FAA Special Emphasis Investigations Team
10101 Hillwood Parkway, Suite 6S-500
Fort Worth, TX 76177
Telephone: (817) 222-4600
Email: kenneth.feist@faa.gov