| Parameters
| Range
| Accuracy sensor input to DFDR readout
| Sampling interval (per second)
| resolution
4 read out
|
|---|
| 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 Vso, and Vso to 1.2 VD | ±5%, ±3% | 1 | 1kt
|
| 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) | | 1 | |
| 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 on 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 (discretion) | | 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 | 0.22
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) | |
| N
1 | As installed | As installed | 1 (per engine) | |
| N
2 | 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 | 1mi.
|
| Nav 1 and 2 Frequency Selection | Full range | As installed | 0.25
| |