Garmin GPS 400W Installation Manual

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Garmin GPS 400W Installation Manual Manual pdf 117 page image

400W Series Installation Manual Page 7-1190-00356-02 Rev. A7. LIMITATIONS7.1 OperationsThere are no Part 23 aircraft type limitations. All functions of the 400W Series unit meet the appropriatedesign assurance qualifications for primary or secondary for airplane Class I, Class II, Class III, and ClassIV in accordance with AC 23.1309-1C Figure 2. The TSO authorizations with the RTCA/DO178Bsoftware levels by function are listed in Table 1-4.7.1.1 TSO-C146a GPS/WAAS LimitationsDue to the equipment’s TSO qualified performance in tracking low-elevation-angle satellites, operationallimitations may be required based upon the GPS antenna or GPS software used in the installation. If AMLSTC SA01933LA is used as the basis for approval, the appropriate limitations are included in the AFMSprovided with the STC. However, if other airworthiness approval is obtained, the following limitationsmust be included in the Aircraft Flight Manual or Aircraft Flight Manual Supplement if an antenna listedin Table 1-3 or GPS software version 2.x is used:The equipment does not comply with US 14 CFR part 91, SFAR 97 requirements for TSO-C146aequipment. Until complete compliance is demonstrated and approved by the FAA, authorization toconduct any GPS or WAAS operation under Instrument Flight Rules (IFR) requires that:1) Aircraft using the GPS or WAAS capability of the 400W Series navigation equipment underIFR must be equipped with an approved and operational alternate means of navigationappropriate to the flight, with the exception of oceanic and remote operations.2) For flight planning purposes, if an alternate airport is required, it must have an approvedinstrument approach procedure other than GPS or RNAV that is anticipated to be operationaland available at the estimated time of arrival. All equipment required for this procedure mustbe installed and operational.3) For flight planning purposes, Garmin Prediction Program part number 006-A0154-03 (with the antenna selected) should be used toconfirm the availability of RAIM for the intended flight in accordance with the local aviationauthority guidelines for TSO-C129a equipment. WAAS NOTAMs (or their absence) andgeneric prediction tools do not provide an acceptable indication of the availability for the400W Series equipment.4) When flight planning an LNAV/VNAV or LPV approach, operators should use the GarminPrediction Program part number 006-A0154-03 (with the number/part number> antenna selected) in addition to any NOTAMs issued for theapproach.NOTEGarmin Prediction Program part number 006-A0154-03 is contained on the 400W/500WTrainer CD, P/N 010-10601-00.7.1.2 Safety Assessment ConsiderationsTSO-C146a defines loss of function of en route, terminal, non-precision approach, or precision approachnavigation data as a major failure condition. AC 23.1309-1C provides guidance for IFR airplanes thatclassifies total loss of function as a major failure condition, and loss of primary means of function asminor if two navigation systems are installed. One method to meet the major failure condition for loss offunction is to install redundant systems. It is recommended that the aircraft be equipped with at least twoindependent navigation receivers and two independent communication transceivers for IFR use. Forindependent navigation systems, two 400W Series units may be used, or a combination of 400W/500WSeries and an independent NAV/COM unit may be used. This will support a System Safety Assessment of