400W Series Installation Manual Page 7-1190-00356-02 Rev. G7. 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. IfAML STC SA01933LA is used as the basis for approval, the appropriate limitations are included in theAFMS provided with the STC. However, if other airworthiness approval is obtained, the followinglimitations must be included in the Aircraft Flight Manual or Aircraft Flight Manual Supplement if anantenna listed in Table 1-3 or GPS software version 2.X is used:NOTEThe limitations below do not apply to VFR-only installations and as such do not needto be included in the AFM/AFMS.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, authorizationto conduct 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 (withthe antenna selected) should beused to confirm the availability of RAIM for the intended flight in accordance with the localaviation authority guidelines for TSO-C129a equipment. WAAS NOTAMs (or their absence)and generic 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.
