Appendix 1 APPENDIX 1. TABLES TABLE 1. ABBREVIATED CORRESPONDENCE TEST
ALTITUDE INFORMATION PULSE POSITIONS
RANGE PULSE POSITION (0 or 1 in a pulse position indicates absence or presence of a pulse, respectively)
INCREMENTS (FEET) D4 A1 A2 A4 B1 B2 B4 C1 C2 C4 -1000 0 0 0 0 0 0 0 0 1 0
- 9 0 0 000 0000110
- 7 0 0 000 0001100
- 4 0 0 000 0001011
- 2 0 0 000 0011001 8 0 0 000 0110001 2800 0 0 0 1 1 0 0 0 0 1 6800 0 0 1 1 0 0 0 0 0 1 14800 0 1 1 0 0 0 0 0 0 1 30800 1 1 0 0 0 0 0 0 0 1 Integrity of code lines is ensured through testing at these increments.
Appendix 1 APPENDIX 1. TABLES (cont’d) TABLE 2. CORRESPONDENCE TEST
ALTITUDE INFORMATION PULSE POSITION
RANGE PULSE POSITION (0 or 1 in a pulse position indicates absence or presence of a pulse respectively)
INCREMENTS (FEET) D4 A1 A2 A4 B1 B2 B4 C1 C2 C4
- 1050 to - 950 0 0 0 0000010
- 5 0 t o + 5 0 0000011010 450 to 550 0 0 0 0010010 950 to 1050 0 0 0 0110010 1050 to 1150 0 0 0 0110110 1250 to 1350 0 0 0 0111100 1450 to 1550 0 0 0 0111010 1750 to 1850 0 0 0 0101001 1950 to 2050 0 0 0 0101010 2550 to 2650 0 0 0 0100011 2650 to 2750 0 0 0 0100001 2950 to 3050 0 0 0 1100010 3950 to 4050 0 0 0 1111010 5950 to 6050 0 0 0 1001010 6750 to 6850 0 0 1 1000001 7950 to 8050 0 0 1 1011010 9950 to 10050 0 0 1 1101010 11950 to 12050 0 0 1 0111010 13950 to 14050 0 0 1 0001010 14750 to 14850 0 1 1 0000001 15950 to 16050 0 1 1 0011010 17950 to 18050 0 1 1 0101010 19950 to 20050 0 1 1 1111010 21950 to 22050 0 1 1 1001010 24950 to 25050 0 1 0 1110010 29950 to 30050 0 1 0 0001010 30750 to 30850 1 1 0 0000001 34950 to 35050 1 1 0 1100010 39950 to 40050 1 1 1 1011010 44950 to 45050 1 1 1 0010010 49950 to 50050 1 0 1 0101010
Appendix 1 Page 3 (and 4) APPENDIX 1. TABLES (cont’d) TABLE 3. TEST ASSOCIATION MATRIX The following table lists appropriate tests to assure system functionality after removal, replacement, or installation of altitude reporting equipment and transponder system components.
COMPONENT DESCRIPTOR TEST(S) Altimeter Pilot reference 1. Field elevation verification
2. Correspondence test
3. Static leak test Altimeter Pilot reference Matched to encoder prior to installation
1. Field elevation verification
2. Abbreviated correspondence test
3. Static leak test Altimeter Other than pilot reference 1. Field elevation verification
2. Static leak test Encoding altimeter Pilot reference 1. Field elevation verification
2. Abbreviated correspondence test
3. Static leak test Encoding altimeter Other than pilot reference 1. Field elevation verification
2. Correspondence test
3. Static leak test Encoding altimeter Other than pilot reference Matched to pilot reference altimeter prior to installation
1. Field elevation verification
2. Abbreviated correspondence test
3. Static leak test Blind altitude encoder Connected to transponder 1. Correspondence test
2. Static leak test Blind altitude encoder Connected to transponder Matched to pilot reference altimeter prior to installation
1. Abbreviated correspondence test
2. Static leak test Blind altitude encoder Not connected to transponder 1. Abbreviated correspondence test (modified)
2. Static leak test High Reliability Style Connectors Connectors designed to or meeting Military or similar Industry standards Pilot Reference Altimeter The altimeter normally used to maintain flight altitude.
Transponder High reliability style connector system
1. Transponder test and inspection Transponder Non-high reliability style connector system
1. Transponder test and inspection
2. Abbreviated correspondence test
Appendix 2 Page 1 (and 2) APPENDIX 2. GLOSSARY OF TERMS.
1. Approved: Unless used with reference to another person, means approved by the Administrator.
2. Blind Encoder (Digitizer): An altitude reporting encoder that is pressure operated, having no altitude display; is not part of a pressure/altitude indicating device or system; does not contain an external means for barometric setting and may supply altitude reporting information to the A.T.C. transponder, GPS, or other onboard system.
3. Calibrated Datum of the Altimeter: The correction applied via a specific calibration card applicable to a specific altimeter to correct for instrument error (scale error) only.
4. Correspondence: The maximum absolute difference between altimeter display and encoder output for a constant encoder output. The altimeter's displayed pressure/altitude (referenced to 29.92) compared to encoded altitude output from the blind encoder or encoding altimeter; for the entire period (from the moment that the code output changes to a value to the moment the code output changes to the next value while the pressure/altitude is changing).
5. Data: Drawings, sketches, stress analysis, reports, operating limitations, or photographs that support or describe an alteration.
6. Encoding Altimeter (Pressure Altitude): An altitude indicator that displays to the pilot the pressure/altitude sensed by the device and produces an altitude reporting output.
7. Indicated Datum of the Altimeter: The altitude displayed by the altimeter when an ideal absolute pressure is applied to the sensing member of the altimeter, and not corrected for instrument error (scale error), nor corrected for static source error.
8. Matched Components: An altimeter and a blind encoder, which have been tested and calibrated together and, as a combination, meet the requirements of § 91.411(a).