F if the raim function is not predicted to be

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f. If the RAIM function is not predicted to be available during the approach, or if the approach has not been enabled at a distance of 2 nm inbound to the final approach fix, the equipment shall provide an indication that approach navigation is not provided. This indication must be sufficient to ensure that the pilot will not inadvertently conduct an approach using terminal area scale sensitivity. 2. If the pilot manually sequences to the missed approach holding point, the equipment shall: a. Transition from approach integrity performance to terminal integrity performance as specified in Table 2-1 of RTCA/DO-208. b. Provide a smooth transition from 0.3 nm non- numeric display sensitivity to 1 nm sensitivity. 3. A means shall be provided for deselection of the approach mode with a single action by the pilot, e.g. single button push. Deselection of the approach mode shall: a. Transition from RNAV (non-precision) approach integrity performance to terminal integrity performance as specified in Table 2-1 of RTCA/DO-208. b. Provide a smooth transition from 0.3 nm non- numeric display sensitivity to 1 nm sensitivity. 4. If the ability to perform DME arcs is provided, the equipment shall permit the pilot to readily accomplish such procedures in accordance with published non-precision approach procedures utilizing 1Page 11
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TSO-C129a piloting techniques similar to those applicable to use of the reference DME facility. (xiii) Failure/Status Indications . In lieu of paragraph 2.2.1.10 of RTCA/DO-208, substitute the following requirement: The equipment shall indicate, independent of any operator action, the following: 1. By means of a navigation warning flag on the navigation display: a. The absence of power required for the navigation function. b. Any probable equipment malfunction or failure affecting the navigation function. c. Loss of navigation function. d. For equipment certified to class A1, inadequate or invalid navigation data in the approach mode detected in accordance with RTCA DO-208 paragraph 2.2.1.13, Table 2-1, and paragraph (a)(3)(xv) of this TSO. e. For equipment certified to class A1, loss of the RAIM detection function in the approach mode, after passing the final approach fix. However, the navigation warning flag may be delayed until the RAIM detection function is lost for more than 5 minutes. 2. By means of an appropriately located annunciator: a. When RAIM is not available, inadequate navigation data due to poor space vehicle geometry such that the probability that navigation error exceeds the position integrity performance requirements in RTCA/DO-208 (Table 2-1) is greater than or equal to 0.05. b. The RAIM function detects a position error that exceeds the GPS position integrity performance requirements in RTCA/DO- 208 (Table 2-1). c. Loss of the RAIM function. Display of the integrity annunciation may be delayed for a period of time consistent with the requirements of paragraph (a)(3)(xiv)2 of this TSO.
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