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Part VI - General Operating and Flight Rules

Canadian Aviation Regulations (CARs) 2011-2

Standard 625 Schedule 2 - Aeroplane Flight Data Recorder (FDR) Specifications

Content last revised: 2009/12/01

(Ref CAR 605.33)
(amended 2009/12/01; previous version)

Column I Column II Column III Column IV Column V
Parameters Range Installed System ¹ Minimum Accuracy (to recovered data) Sampling interval

(in seconds) 		Resolution 4

read-out
Relative Time (from recorded on prior to take-off) 8 hour minimum ±0.125% per hour 1 1 sec.
Altitude -1,000 ft. to maximum certificated altitude of aircraft. ±100 ft. to ±700 ft. (see table 1 CAN-TSO C 51-a)

 1 25 to 150 ft.
Indicated Airspeed VSO to VD (KIAS) ±5% or ±10 kts., whichever is greater. Resolution 2 kts. below 175 KIAS 1 1% ³
Magnetic Heading 360° ±5° 1 1°
Vertical acceleration -3g to +6g ±0.2g in addition to ±0.3g maximum datum 4 (or 1 where peaks, ref. to 1g are recorded) 0.03g
Longitudinal acceleration ±1.0g ±1.5% max. range excluding datums error of ±5% 2 0.8°
Pitch attitude 100% of usable range ±2° 1 0.8°
Roll attitude ±60° or 100% of usable range, whichever is greater ±2° 1 0.8°
Stabilizer trim positionor Full range ±3% unless higher uniquely required 1 1% ³
Pitch control position Full range ±3% unless higher uniquely required 1 1% ³
Engine power, each engineFan or N1 speed or EPR or cockpit indications used for aircraft certification

or 		Maximum range ±5% 1 1% ³
Prop. speed and torque (sample once/sec as close together as praticable Maximum range ±5% 1 (prop speed)

1 (torque) 		1% ³
Altitude rate² (need depends on altitude resolution) ±8,000 fpm ±10% Resolution 250 fpm below 12,000 ft. indicated 1 250 fpm below 12,000 ft.
Angle of attack² (need depends on altitude resolution) -20° to +40° or 100% of usable range ±2° 1 0.8% ³
Radio transmitter keying (discrete) On/off   1  
Trailing edge flaps (discrete or analog) Each discrete position (Up, Down, Take-off, Approach)

or 		±3° 1 1% ³
Trailing edge flaps (discrete or analog) Analog 0-100% range ±3° 1 1% ³
Leading edge flaps (discrete or analog) Each discrete position (Up, Down, Take-off, Approach)

or 		±3° 1 1% ³
Leading edge flaps (discrete or analog) Analog 0-100% range ±3° 1 1% ³
Thrust reverser, each engine (discrete) Stowed or full reverse   1  
Spoiler/speedbrake (discrete) Stowed or out   1  
Autopilot engaged (discrete) Engaged or Disengaged   1  

Notes for Schedule 2

1 When data sources are aircraft instruments (except altimeters) of acceptable quality to fly the aircraft, the recording system excluding these sensors (but including all other characteristics of the recording system) shall contribute no more than half of the values in this column.

2 If data from the altitude encoding altimeter (100 ft. resolution) is used, then either one of these parameters should be recorded. If however, altitude is recorded at a minimum resolution of 25 feet, then these two parameters can be omitted.

3 Percent of full range.

4 This column applies to aeroplanes manufactured after October 11, 1991.

Date modified:
2012-01-23