(1) Deviation ETSO-C2d#1 – Airspeed Instruments
Deviate from ETSO-C2d 3.1.1 to use SAE AS 8019A instead of SAE AS 8019 as the Minimum Performance Standard.
See Annex 1.
(2) Deviation ETSO-C2d#2 – Airspeed Instruments
Deviate from ETSO-C2d to eliminate the requirement 3.2.3 in SAE AS 8019A that requires "the instrument face to be marked with 'Airspeed' or 'IAS' and also with the applicable units of measure."
See Annex 3.2.
(3) Deviation ETSO-C2d#3 – Airspeed Instruments
Deviate from ETSO-C2d to modify the requirement 3.2.5 in SAE AS 8019A that requires "The indicating means to be visible from all points on a surface defined as making an angle of 30 degrees with the perpendicular." The viewing envelope is defined (per ETSO-C113 and SAE AS8034 Section 4.2) as 45 degrees in both horizontal directions, 45 degrees in the up vertical direction, and 10 degrees in the down vertical direction.
See Annex 3.1.
(4) Deviation ETSO-C3d#1 – Turn and Slip Instruments
Deviate from ETSO-C3d to modify the requirement 3.7 in SAE AS 8004 that requires "The indicating means to be visible from all points on a surface defined as making an angle of 30 degrees with the perpendicular." The viewing envelope is defined (per ETSO-C113 and SAE AS8034 Section 4.2) as 45 degrees in both horizontal directions, 45 degrees in the up vertical direction, and 10 degrees in the down vertical direction.
See Annex 3.1.
(5) Deviation ETSO-C4c#1 – Bank and Pitch Instruments
Deviate from ETSO-C4c 3.1.1 to use SAE AS 8001 instead of SAE AS 396B for Minimum Performance Standards and Environmental Standards.
See Annex 1.
(6) Deviation ETSO-C4c#2 – Bank and Pitch Instruments
Deviate from ETSO-C4c 3.1.2 and SAE Aerospace Standard AS 8001 to use RTCA DO-160D instead of RTCA DO-138 as the standard for Environmental Conditions and Test Procedures for Airborne Equipment.
See Annex 2.
(7) Deviation ETSO-C4c#3 – Bank and Pitch Instruments
Industry: Neither ETSO-C4c nor SAE Aerospace Standard AS 8001 specifies use of a standard for software development; RTCA DO-178B shall be used as the standard for Software Considerations in Airborne Systems and Equipment Certification.
EASA: EASA promotes to use the EUROCAE ED-12B/RTCA DO-178B software development process even though not required by the specific ETSO. Historically it had not been assumed to realise such a function by software.
(8) Deviation ETSO-C6d#1 – Direction Instrument, Magnetic (Gyroscopically Stabilized)
Deviate from ETSO-C6d 3.1.1 to use SAE AS 8013A instead of SAE AS 8013 as the Minimum Performance Standard.
See Annex 1.
(9) Deviation ETSO-C6d#2 – Direction Instrument, Magnetic (Gyroscopically Stabilized)
Deviate from ETSO-C6d to modify the requirement 3.10.2 in SAE AS 8013A that requires "The indicating means to be visible from all points on a surface defined as making an angle of 30 degrees with the perpendicular." The viewing envelope is defined (per ETSO-C113 and SAE AS8034 Section 4.2) as 45 degrees in both horizontal directions, 45 degrees in the up vertical direction, and 10 degrees in the down vertical direction .
See Annex 3.1.
(10) Deviation ETSO-C8d#1 – Vertical Velocity Instrument (Rate-of-Climb)
Deviate from ETSO-C8d 3.1.1 to use SAE AS 8016A instead of SAE AS 8016 as the Minimum Performance Standard.
See Annex 1.
(11) Deviation ETSO-C8d#2– Vertical Velocity Instrument (Rate-of-Climb)
Deviate from ETSO-C8d to modify the requirement 3.2.4 in SAE AS 8016A that requires "The indicating means to be visible from all points on a surface defined as making an angle of 30 degrees with the perpendicular." The viewing envelope is defined (per ETSO-C113 and SAE AS8034 Section 4.2) as 45 degrees in both horizontal directions, 45 degrees in the up vertical direction, and 10 degrees in the down vertical direction.
See Annex 3.1.
(12) Deviation ETSO-C9c#1 – Automatic Pilots
Deviate from ETSO-C9c 3.1.1 to use SAE AS-402B instead of AS-402A.
See Annex 1.
(13) Deviation ETSO-C9c#2 – Automatic Pilots
Deviate from AS-402B paragraph 4.4.1 to limit autopilot engagement to attitudes considered safe for the certified aircraft. Use Autopilot limitations that limit pitch and roll engagement to more conservative limits.
See Annex 4.1.
(14) Deviation ETSO-C9c#3 – Automatic Pilots
Deviate from AS402B paragraph 4.3.2 to not provide servo effort indications when the automatic pilot is not engaged.
See Annex 4.2.
(15) Deviation ETSO-C9c#4 – Automatic Pilots
Deviate from ETSO-C9c 3.1.2 to use DO-160D instead SAE AS 402A for specified environmental tests.
See Annex 2.
(16) Deviation ETSO-C10b#1 – Aircraft Altimeter, Pressure Actuated, Sensitive Type
Deviate from ETSO-C10b 3.1.1 to use SAE AS 8009A instead of SAE AS 392C as the Minimum Performance Standard.
See Annex 1.
(17) Deviation ETSO-C10b#2 – Aircraft Altimeter, Pressure Actuated, Sensitive Type
Deviate from ETSO-C10b to modify the requirement 3.7 in SAE AS 8009A that requires "Pointers and dial markings shall be visible from any point within the frustrum of a cone; the side of which makes an angle of 30 degrees with the perpendicular to the dial and the small diameter of which is the aperture the instrument case." The viewing envelope is defined (per ETSO-C113 and SAE AS8034 Section 4.2) as 45 degrees in both horizontal directions, 45 degrees in the up vertical direction, and 10 degrees in the down vertical direction.
See Annex 3.1.
(18) Deviation ETSO-C10b#3 – Aircraft Altimeter, Pressure Actuated, Sensitive Type
Deviate from SAE AS 8009A Section 3.11 to not display ALTITUDE or ALT next to the tape indicating altitude.
See Annex 3.2.
(19) Deviation ETSO-C10b#4 – Aircraft Altimeter, Pressure Actuated, Sensitive Type
Deviate from ETSO-C10b 3.1.2 to use RTCA DO-160D instead of SAE AS 8009A as the standard for Environmental Conditions and Test Procedures for Airborne Equipment.
See Annex 2.
(20) Deviation ETSO-2C35d#1 – Radar Marker Receiving Equipment
Deviate from ETSO-2C35d which calls out EUROCAE 1/WG7 Section 3.16 to allow the visual indication of the Standard Test Signal to not flash synchronized with the keying, but to flash at the following fixed rates while keyed: Outer 1.33 Hz, Middle 3 Hz, Inner 4 Hz.
See Annex 3.2.
(21) Deviation ETSO-C43c#1 – Temperature Instruments
Deviate from ETSO-C43c 3.1.1 to use SAE AS 8005A instead of SAE AS 8005 as the Minimum Performance Standard.
See Annex 1.
(22) Deviation ETSO-C44b#1 – Fuel Flowmeters
Deviate from ETSO-C44b 3.1.1 to use SAE AS 407C instead of SAE AS 407B to demonstrate compliance for Fuel Flowmeters.
See Annex 1.
(23) Deviation ETSO- C44b#2 – Fuel Flowmeters
Deviate from ETSO-C44b 3.1.2 to use RTCA DO-160D instead of SAE AS 407B as the standard for Environmental Conditions and Test Procedures for Airborne Equipment.
See Annex 2.
(24) Deviation ETSO- C44b#3 – Fuel Flowmeters
Deviate from ETSO-C44b to modify the requirement 4.2.5 in SAE AS 407C that requires "The indicating means to be visible from all points on a surface defined as making an angle of 30 degrees with the perpendicular." The viewing envelope is defined (per ETSO-C113 and SAE AS8034 Section 4.2) as 45 degrees in both horizontal directions, 45 degrees in the up vertical direction, and 10 degrees in the down vertical direction.
See Annex 3.1.
(25) Deviation ETSO- C44b#4 – Fuel Flowmeters
Deviate from ETSO-C44b to modify the requirement 4.1.1 in SAE AS 407C that requires "Type I Instruments: Rotating pointer with fixed graduated dial or counter type indication. Clockwise pointer motion shall indicate increasing rate of flow." The gauge is defined as a horizontal or vertical bar with fixed graduations, with a pointer motion to the right or up indicating an increase rate of flow.
See Annex 3.2.
(26) Deviation ETSO-C45a#1 – Manifold Pressure Instruments
Deviate from ETSO-C45a 3.1.1 to use SAE AS 8042 instead of SAE AS 411 for Minimum Performance Standards.
See Annex 1.
(27) Deviation ETSO-C45a#2 – Manifold Pressure Instruments
Deviate from ETSO-C45a to use RTCA DO-160D instead of SAE AS 411 as the standard for Environmental Conditions and Test Procedures for Airborne Equipment.
See Annex 2.
(28) Deviation ETSO-C45a#3 – Manifold Pressure Instruments
Deviate from ETSO-C45a SAE 8042 3.10.5 to use MAN as abbreviation instead of MANIFOLD PRESSURE or MANIF PRESS.
See Annex 3.2.
(29) Deviation ETSO-C45a#4 – Manifold Pressure Instruments
Deviate from ETSO-C45a to modify the requirement 3.10.9 in SAE AS 8042 that requires "The indicating means to be visible from all points on a surface defined as making an angle of 30 degrees with the perpendicular." The viewing envelope is defined (per ETSO-C113 and SAE AS8034 Section 4.2) as 45 degrees in both horizontal directions, 45 degrees in the up vertical direction, and 10 degrees in the down vertical direction.
See Annex 3.1.
(30) Deviation ETSO-C47#1 – Pressure Instruments – Fuel, Oil and Hydraulic (Reciprocating Engine Powered Aircraft)
Deviate from ETSO-C47 3.1.1 to use SAE AS 408C instead of SAE AS 408A for Minimum Performance Standards and Environmental Standards.
See Annex 1.
(31) Deviation ETSO-C47#2 – Pressure Instruments – Fuel, Oil and Hydraulic (Reciprocating Engine Powered Aircraft)
Deviate from ETSO-C47 to modify the requirement 4.1.5 in SAE AS 408C that requires "The indicating means to be visible from all points on a surface defined as making an angle of 30 degrees with the perpendicular." The viewing envelope is defined (per ETSO-C113 and SAE AS8034 Section 4.2) as 45 degrees in both horizontal directions, 45 degrees in the up vertical direction, and 10 degrees in the down vertical direction.
See Annex 3.1.
(32) Deviation ETSO-C47#3 – Pressure Instruments – Fuel, Oil and Hydraulic (Reciprocating Engine Powered Aircraft)
Deviate from ETSO-C47 3.1.2 to use RTCA DO-160D instead of AS 408C as the standard for Environmental Standards.
See Annex 2.
(33) Deviation ETSO-C49b#1 – Electric Tachometer: Magnetic Drag (Indicator and Generator)
Deviate from ETSO-C49b 3.1.1 to use SAE AS 404C instead of SAE AS 404B for Minimum Performance Standards and Environmental Standards.
See Annex 1.
(34) Deviation ETSO-C49b#2 – Electric Tachometer: Magnetic Drag (Indicator and Generator)
Deviate from ETSO-C49b to modify the requirement 4.1.2 in SAE AS 404C that requires "The indicating means to be visible from all points on a surface defined as making an angle of 30 degrees with the perpendicular." The viewing envelope is defined (per ETSO-C113 and SAE AS8034 Section 4.2) as 45 degrees in both horizontal directions, 45 degrees in the up vertical direction, and 10 degrees in the down vertical direction.
See Annex 3.1.
(35) Deviation ETSO-C49b#3 – Electric Tachometer: Magnetic Drag (Indicator and Generator)
Deviate from ETSO-C49b, SAE AS 404C requirement 4.1.3.2 second sentence which states, “The increment between graduations shall not exceed 2-1/2% of full scale, above 600 RPM.” The tachometer gauge which incorporate a full time digital readout, multiple graduations on the dial are not needed in order for the correct reading to be obtained. The resolution of the digital readout will be 10 RPM which is less than 2-1/2% of full scale. A pointer with clockwise motion for increasing RPM, is provided.
See Annex 3.2.
(36) Deviation ETSO-C49b#4 – Electric Tachometer: Magnetic Drag (Indicator and Generator)
Deviate from ETSO-C49b 3.1.2 to use DO-160D instead of SAE AS 404B as the Environmental Standard.
See Annex 2.
(37) Deviation ETSO-C52b#1 – Flight Directors
Deviate from AS-8008 paragraph 3.6 to limit flight director operation to attitudes considered safe for the certified aircraft. The Autopilot limits pitch and roll engagement to more conservative limits.
See Annex 4.1.
(38) Deviation ETSO-C55#1 – Fuel and Oil Quantity Instruments (Reciprocating Engine Aircraft)
Deviate from ETSO-C55 3.1.1 to use SAE AS 405C instead of SAE AS 405B to demonstrate compliance for Fuel and Oil Quantity Instruments.
See Annex 1.
(39) Deviation ETSO-C55#2 – Fuel and Oil Quantity Instruments (Reciprocating Engine Aircraft)
Deviate from ETSO-C55 to modify the requirement 4.2.5 in SAE AS 405C that requires "The indicating means to be visible from all points on a surface defined as making an angle of 30 degrees with the perpendicular." The viewing envelope is defined (per ETSO-C113 and SAE AS8034 Section 4.2) as 45 degrees in both horizontal directions, 45 degrees in the up vertical direction, and 10 degrees in the down vertical direction.
See Annex 3.1.
(40) Deviation ETSO-C55#3 – Fuel and Oil Quantity Instruments (Reciprocating Engine Aircraft)
Deviate from ETSO-C55 to modify the requirement 4.2.4 in SAE AS 405C to allow "FUEL QTY" to be used to abbreviate "Fuel Quantity".
See Annex 3.2.
(41) Deviation ETSO-C55#4 – Fuel and Oil Quantity Instruments (Reciprocating Engine Aircraft)
Deviate from ETSO-C55 3.1.2 to use DO-160D instead of SAE AS 405B as the Environmental Standard.
See Annex 2.
(42) Deviation ETSO-C118#1 – Traffic Alert and Collision Avoidance System (TCAS) Airborne Equipment, TCAS I
Deviate from ETSO-C118 3.1.1 to use RTCA DO-197A instead of RTCA DO-197 as the Minimum Performance Standard.
See Annex 1.
(43) Deviation ETSO-C129a#1 – Airborne Supplemental Navigation Equipment Using Global Positioning System (GPS)
Deviate from ETSO-C129a (ED-72A 3.2.2.1f(3) and 3.2.2.4j(4)) to eliminate the annunciation for pending CDI scale change 3.0 NM from the FAF.
See Annex 5.
(44) Deviation ETSO-C129a#2 – Airborne Supplemental Navigation Equipment Using Global Positioning System (GPS)
Deviate from ETSO-C129a (ED-72A 3.2.2..1f(4), 3.2.2.3e(4), and 3.2.2.4j(2)) to eliminate the requirement to “alert the pilot of the need to manually insert the barometric pressure. ELOS is provided by the unit calibrating pressure altitude whenever RAIM is available en route.
See Annex 5.
(45) Deviation ETSO-C129a#3 – Airborne Supplemental Navigation Equipment Using Global Positioning System (GPS)
Deviate from ETSO-C129a (ED-72A 3.2.2.4j(8)) to modify the requirement to allow the approach mode to be deselected by performing a direct-to action on the unit. ELOS is provided by a two step operation that is consistent with the operational philosophies applied to the box in other areas. Consistent operation throughout the operation minimizes pilot error.
See Annex 5.
(46) Deviation ETSO-C129a#4 – Airborne Supplemental Navigation Equipment Using Global Positioning System (GPS)
Deviate from ETSO-C129a (ED-72A 3.2.2.3d(2)) to eliminate the requirement to provide a “means to manually identify a satellite that is expected to be unavailable at the destination” for the RAIM prediction process. ELOS is provided by eliminating pilot input error, low probability of satellite unavailability and the full satellite constellation with spares. Regardless of the destination RAIM availability status is correctly provided to the pilot upon arrival.
See Annex 5.
(47) Deviation ETSO-C129a#5 – Airborne Supplemental Navigation Equipment Using Global Positioning System (GPS)
Deviate from ETSO-C129a to change the requirement in ED-72A paragraph 4.16.2 to match the WAAS TSO-C145a and DO-229 requirements for Power input testing. ETSO C145 and DO-229a allow a system reset followed by satellite acquisition time of 5 minutes for abnormal operating conditions power input tests.
See Annex 5.
(48) Deviation ETSO-C146#1 –Stand-Alone Airborne Navigation Equipment using the Global Positioning System (GPS) Augmented by the Wide Area Augmentation System (WAAS)
Deviate from ETSO-C146 to use RTCA DO-229C instead of RTCA DO-229B.
See Annex 1.
(49) Deviation ETSO-C146#2 –Stand-Alone Airborne Navigation Equipment using the Global Positioning System (GPS) Augmented by the Wide Area Augmentation System (WAAS)
Deviate from ETSO-C146 to modify the requirement 2.2.1.1.4.3 in RTCA/DO-229C which states, "They [all displays] shall be fully readable up to a vertical viewing angle of 20 degrees from normal to the face of the display screen." This deviation uses a 10 degree vertical viewing angle below the lower display edge. DO-229C makes no distinction between upper and lower display edges for the requirement of a 20 degree vertical viewing angle.
See Annex 3.1.
(50) Deviation ETSO-C146#3 –Stand-Alone Airborne Navigation Equipment using the Global Positioning System (GPS) Augmented by the Wide Area Augmentation System (WAAS)
Deviate from ETSO-C146 to modify the requirement 2.2.1.4.9.c in RTCA/DO-229C which states, "BRG to or from a VOR: The bearing is based on the true-to-magnetic conversion at the waypoint location, using the same magnetic conversion as used to define the path.” This conversion is based upon the present aircraft location instead, which is how other waypoint’s magnetic variation is computed.
See Annex 6.
(51) Deviation ETSO-C146#4 –Stand-Alone Airborne Navigation Equipment using the Global Positioning System (GPS) Augmented by the Wide Area Augmentation System (WAAS)
Deviate from ETSO-C146 to eliminate the requirement 2.2.4.2.3 in RTCA/DO-229C which states, "If the aircraft is past the FPAP - (length offset), and the pilot has not already activated the missed approach, the receiver shall automatically transition to missed approach guidance.”
See Annex 6.
(52) Deviation ETSO-C146#5 –Stand-Alone Airborne Navigation Equipment using the Global Positioning System (GPS) Augmented by the Wide Area Augmentation System (WAAS)
Deviate from ETSO-C146 to modify the requirements 2.2.4.6.4 and 2.2.5.6.4 in RTCA/DO-229C, pertaining to the low altitude alerting function. The TAWS capabilities of the aircraft shall be used.
See Annex 6.
(53) Deviation ETSO-C146#6 –Stand-Alone Airborne Navigation Equipment using the Global Positioning System (GPS) Augmented by the Wide Area Augmentation System (WAAS)
Deviate from ETSO-C146 to modify the requirement 2.2.1.1.6 in RTCA/DO-229C states: "If a function is implemented as a discrete action, the equipment shall use the labels or messages in the Table". The table (TABLE 2-5 LABELS AND MESSAGES), states that the function “Indication that there is a message” shall be labeled as “MSG” or “M”. Instead the terms “ADVISORY” and “ALERTS” in addition to “MSG” may be used depending upon the installation.
See Annex 6.
