Airworthiness Directive · Amendment 39-22577 · Navigation system
Thales AVS France SAS Flight Management Computer Navigation Modules
This AD applies to Thales AVS France SAS flight management computer navigation modules (FMC2 NAVM), part number (P/N) C13084CA03, installed on, but not limited to airplanes, certificated in any category.
The FAA is adopting a new airworthiness directive (AD) for certain Thales AVS France SAS (Thales) flight management computer navigation modules (FMC2 NAVM) installed on, but not limited to, airplanes. This AD was prompted by reports that, due to software issues, certain FMC2 NAVM navigation modules provide erroneous data to the flight management computer, compromising safe flight of the airplane. This AD requires revising the existing aircraft flight manual (AFM) for your airplane and updating the navigation database. This AD also prohibits installing a database unless certain procedures were removed. The FAA is issuing this AD to address the unsafe condition on these products.
(1) Within 30 days after the effective date of this AD, revise the Limitations Section of the existing airplane flight manual (AFM) for your airplane by adding the information in Table 1 to the introductory text of paragraph (g)(1) of this AD and Table 2 to the introductory text of paragraph (g)(1) of this AD.
| Limitation No. | Limitation/instruction |
|---|---|
| 1 | For Procedure Turn, Tear Drop trajectory, specified turn direction or arc to fix leg in published navigation procedure, disengage FMS Navigation mode and engage Track mode with the expected Track target. |
| 2 | When coupled to the AFCS, do not perform a Direct To while established in Turn. |
| 3 | Do not revise the flight plan until GO AROUND safe altitude (as per Standard Operating Procedure) has been reached. |
| 4 | Initialize the flight plan with at least an intermediate waypoint between departure and destination. |
| 5 | Before flying a procedure (including associated missed approach) that requires to fly over a waypoint, check that the fly-over flag is displayed on MCDU FPLN page beside the constrained fix, as expected in the published chart. If the fly-over is missing, it shall be set manually. |
| 6 | Do not use Vertical Step function. |
| 7 | Do not activate the data save command. |
| 8 | Do not use Offset function. |
| Limitation No. | FMS user manual limitations |
|---|---|
| 1 | Operate the FMS respecting the limitations. |
| 2 | Only operate the FMS of the airplane with a specifically trained crew, as defined in the FMS User Manual, for awareness and training on the mitigation means to recover from the issue “straight leg bypassing following arc to fix leg.” |
(i) Inserting a copy of this AD into the Limitations Section of the existing AFM for your airplane satisfies the requirement of the introductory text of paragraph (g)(1) of this AD.
(ii) The actions required by the introductory text of paragraph (g)(1) of this AD may be performed by the owner/operator (pilot) holding at least a private pilot certificate and must be entered into the aircraft records showing compliance with this AD in accordance with 14 CFR 43.9(a) and 91.417(a)(2)(v). The record must be maintained as required by 14 CFR 91.417, 121.380, or 135.439.
(2) Within 30 days after the effective date of this AD, update the database for your Thales FMC2 NAVM, P/N C13084CA03, with a database that does not contain the procedures specified in section II of Thales Service Information Letter F9111-J70859DN-00, issued January 18, 2022 (Thales SIL F9111-J70859DN-00).
(3) As of the effective date of this AD, do not install a database for your Thales FMC2 NAVM, P/N C13084CA03, unless it does not include the procedures specified in section II of Thales SIL F9111-J70859DN-00.
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.
Appliances and equipment
