Part VI - General Operating and Flight Rules

Canadian Aviation Regulations (CARs) 2017-2

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

Content last revised: 2009/12/01

(Ref CAR 605.33)
(amended 2009/12/01)

Parameters Range Installed SystemFootnote 1 Minimum Accuracy (to recovered data) Sampling interval

(in seconds)
ResolutionFootnote 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)
(amended 2009/12/01)

 
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%Footnote 3
Magnetic Heading 360° ±5° 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%Footnote 3
Pitch control position Full range ±3% unless higher uniquely required 1 1%Footnote 3
Engine power, each engineFan or N1 speed or EPR or cockpit indications used for aircraft certification

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

1 (torque)
1%Footnote 3
Altitude rateFootnote 2 (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 attackFootnote 2 (need depends on altitude resolution) -20° to +40° or 100% of usable range ±2° 1 0.8%Footnote 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%Footnote 3
Trailing edge flaps (discrete or analog) Analog 0-100% range ±3° 1 1%Footnote 3
Leading edge flaps (discrete or analog) Each discrete position (Up, Down, Take-off, Approach)

or
±3° 1 1%Footnote 3
Leading edge flaps (discrete or analog) Analog 0-100% range ±3° 1 1%Footnote 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  
Date modified: