Garmin GPS 400W, GNC 420W Installation Manual

Also see for GNC 420AW: Maintenance manual Pilot's guide addendum Quick reference guide Pilot's Guide & Reference Pilot's Guide & Reference

Contents

Garmin GPS 400W, GNC 420W Installation Manual Manual pdf 26 page image

Page 1-14 400W Series Installation ManualRev. E 190-00356-021.6.2 TSO DeviationsTSO Deviation1. Garmin was granted a deviation from TSO-C34e to use RTCA/DO-178B minimum software level C insteadof RTCA/DO-178A level 2 to demonstrate compliance for the verification and validation of the computersoftware.TSO-C34e2. Garmin was granted a deviation from TSO-C34e to use RTCA/DO-160C instead of RTCA/DO-160B as thestandard for Environmental Conditions and Test Procedures of Airborne Equipment.1. Garmin was granted a deviation from TSO-C36e to use RTCA/DO-178B minimum software level C insteadof RTCA/DO-178A level 2 to demonstrate compliance for the verification and validation of the computersoftware.TSO-C36e2. Garmin was granted a deviation from TSO-C36e to use RTCA/DO-160C instead of RTCA/DO-160B as thestandard for Environmental Conditions and Test Procedures of Airborne Equipment.1. Garmin was granted a deviation from TSO-C37d to use RTCA/DO-178B instead of RTCA/DO-178A todemonstrate compliance for the verification and validation of the computer software.2. Garmin was granted a deviation from TSO-C37d paragraph (a)(1) to allow using RTCA /DO-186A instead ofRTCA/DO-186 to specify minimum performance standards.3. Garmin was granted a deviation from TSO-C37d to allow a 6dB reduction of transmitter power during theNormal Operating Conditions – Emergency Operation Voltage as described in RTCA/DO-186A paragraph2.5.13.1 and RTCA/DO-160C paragraph 16.5.2.1.4. Garmin was granted a deviation from TSO-C37d paragraph (a)(5) to allow 8.33 kHz channel spacing inaddition to the 25 kHz spacing.TSO-C37d5. Garmin was granted a deviation from TSO-C37d paragraph (b)(1) to allow marking to call our 8.33 kHzchannel spacing in addition to the 25 kHz spacing.1. Garmin was granted a deviation from TSO-C38d to use RTCA/DO-178B instead of RTCA/DO-178A todemonstrate compliance for the verification and validation of the computer software.2. Garmin was granted a deviation from TSO-C38d paragraph (a)(1) to allow using RTCA /DO-186A instead ofRTCA/DO-186 to specify minimum performance standards.TSO-C38d3. Garmin was granted a deviation from TSO-C38d paragraph (a)(5) to allow 8.33 kHz channel spacing inaddition to the 25 kHz spacing.1. Garmin was granted a deviation from TSO-C40c to use RTCA/DO-178B instead of RTCA/DO-178A todemonstrate compliance for the verification and validation of the computer software.TSO-C40c2. Garmin was granted a deviation from TSO-C40c to use RTCA/DO-160C instead of RTCA/DO-160B as thestandard for Environmental Conditions and Test Procedures for Airborne Equipment.1. Garmin was granted a deviation from TSO-C113 section 2.1.2 (4) to use RTCA/DO-178B instead ofRTCA/DO-178A to demonstrate compliance for the verification and validation of the computer software.TSO-C1132. Garmin was granted a deviation from TSO-C113 section 2.1.2 (3) to use RTCA/DO-160D instead ofRTCA/DO-160B as the standard for Environmental Conditions and Test Procedures for Airborne Equipment.1. Garmin was granted a deviation from TSO-C146a for the requirement to use as a specific “NAV” labeledkey. RTCA/DO-229c Table 2-5 lists the function “Access to primary navigation display (Section 2.2.1.4.1)” witha label “NAV”.2. Garmin was granted a deviation from TSO-C146a not to implement RTCA/DO-229C paragraph 2.2.3.2.2which states “The equipment shall allow the pilot to initiate the missed approach with manual action. It shall bepossible to take this action before crossing the MAWP, in which case the equipment shall automatically initiatethe missed approach procedure at the MAWP.”3. Garmin was granted a deviation from TSO-C146a not to implement RTCA/DO-229C paragraph 2.2.4.2.3which states “If the aircraft is past the FPAP – (length offset), and the pilot has not already activated themissed approach, the receiver shall automatically transition to missed approach guidance.” This requirementis being eliminated in DO-229D.4. Garmin was granted a deviation from TSO-C146a from RTCA/DO-229C paragraphs 2.2.4.6.4 and 2.2.5.6.4not to use the low altitude alerting function when the 400W series unit has TERRAIN or TAWS enabled and isnot in one of the following states: FAIL, N/A, TEST, or INHIBIT. When neither TERRAIN nor TAWS is enabled,or when one is enabled but the current state is FAIL, N/A, TEST, or INHIBIT, the low altitude alert described inDO-229C 2.2.4.6.4 and 2.2.5.6.4 is used.TSO-C146a5. Garmin was granted a deviation from TSO-C146a not to implement RTCA/DO-229C paragraph 2.2.1.4.9.cwhich states “BRG to or from a VOR: The bearing is based on the true-to-magnetic conversion at the waypointlocation, using the same magnetic conversion as used to define the path.” Instead, the “user” (current)location will be used. The RTCA/DO-229C paragraph 2.2.1.4.9.c requirement is being eliminated in DO-229D.6. Garmin was granted a deviation from TSO-C146a paragraph 4.b. which defines “each separate componentthat is easily removable (without hand tools), each interchangeable element, and each separate subassemblyof the article that the manufacturer determines may be interchangeable must be permanently and legiblymarked with at least the name of the manufacturer, manufacturer’s subassembly part number, and the TSOnumber.”