Airworthiness Directive · Amendment 39-14718 · Sandel Avionics Incorporated Model ST3400 Terrain Awareness Warning System/Radio Magnetic Indicator (TAWS/RMI) Units Approved Under Technical Standard Order(s) C113, C151a, or C151b; Installed on Various Small and Transport Category Airplanes
Sandel Avionics Incorporated Model ST3400 Terrain Awareness Warning System/Radio Magnetic Indicator (TAWS/RMI) Units Approved Under Technical Standard Order(s) C113, C151a, or C151b; Installed on Various Small and Transport Category Airplanes
Superseded. A later AD replaced this one: AD 2006-16-18 R1. Comply with the one in force.
This AD applies to Sandel Avionics Incorporated (Sandel) Model ST3400 terrain awareness warning system/radio magnetic indicator (TAWS/RMI) units approved under Technical Standard Order(s) C113, C151a, or C151b; as identified in Sandel ST3400 Service Bulletin SB3400-01, Revision B, dated September 15, 2004; as installed on various small and transport category airplanes, certificated in any category, including, but not limited, to the airplane models listed in Table 1 of this AD.
| Manufacturer | Airplane model(s) |
|---|---|
| Airbus | A300. |
| Avions Marcel Dassault—Breguet Aviation (AMD/BA) | Falcon 10. |
| Boeing | 727, 737, 747. |
| Bombardier (LearJet) | 24, 35, 36, 55. |
| British Aerospace (Operations) Limited | Jetstream Series 3101. |
| Cessna | 208, 208B, 421C; 501, 525, 550, 560, 650, S550. |
| Embraer | EMB-120. |
| Dassault-Aviation | Mystere-Falcon 50, Mystere-Falcon 200. |
| Gulfstream | G-I, G-1159A (G-III). |
| Israel Aircraft Industries (IAI) | 1124, 1125 Westwind Astra. |
| McDonnell Douglas | DC-10. |
| Piper | PA-31T2. |
| Raytheon | 58; 1900D, 400; A36; BAe.125 Series 800A; HS.125 Series 600A/700A; Hawker 800-XP; 200, 300, 350, A200, B100, B200, B300, C90, C90A, C90B, E90, F90, MU-300-10. |
| Sabreliner | 60 (NA-265-60). |
| Twin Commander | 500-A, 695A. |
| Viking Air Limited | DHC-6. |
The FAA is adopting a new airworthiness directive (AD). The new AD is for Sandel Avionics Incorporated Model ST3400 TAWS/RMI units as described above. This AD requires installing a warning placard on the TAWS/RMI and revising the Limitations section of the airplane flight manual (AFM). This AD also requires installing upgraded software in the TAWS/RMI. This AD results from a report that an in-flight bearing error occurred in a Model ST3400 TAWS/RMI configured to receive bearing information from a very high frequency omnidirectional range (VOR) receiver interface via a composite video signal, due to a combination of input signal fault and software error. We are issuing this AD to prevent a bearing error, which could lead to an airplane departing from its scheduled flight path, which could result in a reduction in separation from, and a possible collision with, other aircraft or terrain.
You are responsible for having the actions required by this AD performed within the compliance times specified, unless the actions have already been done.
Within 14 days after the effective date of this AD: Install a placard on the TAWS/RMI which states, “NOT FOR PRIMARY VOR NAVIGATION,” in accordance with Sandel ST3400 Service Bulletin SB3400-01, Revision B, dated September 15, 2004.
Within 14 days after the effective date of this AD: Revise the Limitations section of the applicable AFM to include the following statement: “Use of ST3400 TAWS/RMI for primary VOR navigation is prohibited unless the indicator has 3.07 or A3.06 software or later.” This may be done by inserting a copy of this AD into the AFM.
Within 90 days after the effective date of this AD, in accordance with Sandel ST3400 Service Bulletin SB3400-01, Revision B, dated September 15, 2004: Field-load the TAWS/RMI with updated software having revision 3.07 (for units having serial numbers (S/Ns) under 2000) or revision A3.06 (for units having S/Ns 2000 and subsequent). The placard and AFM limitations revision installed as required by paragraphs (f) and (g) of this AD may be removed after the software upgrade required by paragraph (h) of this AD has been accomplished.
(i) As of 90 days after the effective date of this AD, no person may install, on any airplane, an ST3400 TAWS/RMI unit, unless it has been modified in accordance with Sandel ST3400 Service Bulletin SB3400-01, Revision B, dated September 15, 2004.
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.
Aircraft
Appliances and equipment
