| Parameters
| Range
| Accuracy sensor input to DFDR readout
| Sampling interval (per second)
| Resolution
4 readout
|
|---|
| Time (GMT or Frame Counter) (range 0 to 4095, sampled 1 per frame) | 24 Hrs | ±0.125% Per Hour | 0.25 (1 per 4 seconds) | 1 sec.
|
| Altitude | −1,000 ft to max certificated altitude of aircraft | ±100 to ±700 ft (See Table 1, TSO-C51a) | 1 | 5′ to 35′
1
|
| Airspeed | 50 KIAS to V so, and V so to 1.2VD | ±5%, ±3% | 1 | 1 kt.
|
| Heading | 360° | ±2° | 1 | 0.5°
|
| Normal Acceleration (Vertical) | −3g to + 6g | ±1% of max range excluding datum error of ±5% | 8 | 0.01g.
|
| Pitch Attitude | ±75° | ±2° | 1 | 0.5°
|
| Roll Attitude | ±180° | ±2° | 1 | 0.5°
|
| Radio Transmitter Keying | On-Off (Discrete) | ±2° | ±2% | |
| Thrust/Power on Each Engine | Full Range Forward | ±2° | 1 (per engine) | 0.2%
2
|
| Trailing Edge Flap or Cockpit Control Selection | Full Range or Each Discrete Position | ±3° or as Pilot's Indicator | 0.5 | 0.5%
2
|
| Leading Edge Flap or Cockpit Control Selection | Full Range or Each Discrete Position | ±3° or as Pilot's Indicator | 0.5 | 0.5%
2
|
| Thrust Reverser Position | Stowed, In Transit, and Reverse (Discrete) | | 1 (per 4 seconds per engine) | |
| Ground Spoiler Position/Speed Brake Selection | Full Range or Each Discrete Position | ±2% Unless Higher Accuracy Uniquely Required | 1 | 0.2%
2.
|
| Marker Beacon Passage | Discrete | | 1 | |
| Autopilot Engagement | Discrete | | 1 | |
| Longitudinal Acceleration | ±1g | ±1.5% max range excluding datum error of ±5% | 4 | 0.01g.
|
| Pilot Input and/or Surface Position—Primary Controls (Pitch, Roll, Yaw)
3 | Full Range | ±2° Unless Higher Accuracy Uniquely Required | 1 | 0.2%
2.
|
| Lateral Acceleration | ±1g | ±1.5% max range excluding datum error of ±5% | 4 | 0.01g.
|
| Pitch Trim Position | Full Range | ±3% Unless Higher Accuracy Uniquely Required | 1 | 0.3%
2.
|
| Glideslope Deviation | ±400 Microamps | ±3% | 1 | 0.3%
2.
|
| Localizer Deviation | ±400 Microamps | ±3% | 1 | 0.3%
2.
|
| AFCS Mode and Engagement Status | Discrete | | 1 | |
| Radio Altitude | −20 ft to 2,500 ft | ±2 Ft or ±3% Whichever is Greater Below 500 Ft and ±5% Above 500 Ft | 1 | 1 ft + 5%
2 above 500′.
|
| Master Warning | Discrete | | 1 | |
| Main Gear Squat Switch Status | Discrete | | 1 | |
| Angle of Attack (if recorded directly). | As installed | As installed | 2 | 0.3%
2
|
| Outside Air Temperature or Total Air Temperature. | −50 °C to + 90 °C | ±2 °c | 0.5 | 0.3 °c
|
| Hydraulics, Each System Low Pressure | Discrete | | 0.5 | or 0.5%
2
|
| Groundspeed. | As installed | Most Accurate Systems Installed (IMS Equipped Aircraft Only) | 1 | 0.2%
2
|
| If additional recording capacity is available, recording of the following parameters is recommended. The parameters are listed in order of significance:
|
| Drift Angle | When available, As installed | As installed | 4 | |
| Wind Speed and Direction | When available, As installed | As installed | 4 | |
| Latitude and Longitude | When available, As installed | As installed | 4 | |
| Brake pressure/Brake pedal position | As installed | As installed | 1 | |
| Additional engine parameters:
| | | | |
| EPR | As installed | As installed | 1 (per engine). | |
| N1 | As installed | As installed | 1 (per engine). | |
| N2 | As installed | As installed | 1 (per engine). | |
| EGT | As installed | As installed | 1 (per engine). | |
| Throttle Lever Position | As installed | As installed | 1 (per engine). | |
| Fuel Flow | As installed | As installed | 1 (per engine). | |
| TCAS:
| | | | |
| TA | As installed | As installed | 1 | |
| RA | As installed | As installed | 1 | |
| Sensitivity level (as selected by crew) | As installed | As installed | 2 | |
| GPWS (ground proximity warning system) | Discrete | | 1 | |
| Landing gear or gear selector position | Discrete | | 0.25 (1 per 4 seconds) | |
| DME 1 and 2 Distance | 0-200 NM; | As installed | 0.25 | 1 mi.
|
| Nav 1 and 2 Frequency Selection | Full range | As installed | 0.25 | |