Title 14

PART 135 APPENDIX B



Appendix B to Part 135 - Airplane Flight Recorder Specifications

14:3.0.1.1.11.14.3.1.37 : Appendix B

Appendix B to Part 135 - Airplane Flight Recorder Specifications
Parameters Range Installed system 1 minimum accuracy (to recovered data) Sampling interval (per second) Resolution 4 read out
Relative time (from recorded on prior to takeoff) 25 hr minimum ±0.125% per hour 1 1 sec.
Indicated airspeed Vso to VD (KIAS) ±5% or ±10 kts., whichever is greater. Resolution 2 kts. below 175 KIAS 1 1% 3.
Altitude −1,000 ft. to max cert. alt. of A/C ±100 to ±700 ft. (see Table 1, TSO C51-a) 1 25 to 150
Magnetic heading 360° ±5° 1
Vertical acceleration −3g to + 6g ±0.2g in addition to ±0.3g maximum datum 4 (or 1 per second where peaks, ref. to 1g are recorded) 0.03g.
Longitudinal acceleration ±1.0g ±1.5% max. range excluding datum error of ±5% 2 0.01g.
Pitch attitude 100% of usable ±2° 1 0.8°
Roll attitude ±60° or 100% of usable range, whichever is greater ±2° 1 0.8°
Stabilizer trim position Full range ±3% unless higher uniquely required 1 1% 3.
Or
Pitch control position Full range ±3% unless higher uniquely required 1 1% 3.
Engine Power, Each Engine
Fan or N1 speed or EPR or cockpit indications used for aircraft certification Maximum range ±5% 1 1% 3.
Or
Prop. speed and torque (sample once/sec as close together as practicable) 1 (prop speed), 1 (torque)
Altitude rate 2 (need depends on altitude resolution) ±8,000 fpm ±10%. Resolution 250 fpm below 12,000 ft. indicated 1 250 fpm Below 12,000
Angle of attack 2 (need depends on altitude resolution) −20° to 40° or of usable range ±2° 1 0.8% 3
Radio transmitter keying (discrete) On/off 1
TE flaps (discrete or analog) Each discrete position (U, D, T/O, AAP) 1
Or
Analog 0-100% range ±3° 1 1% 3
LE flaps (discrete or analog) Each discrete position (U, D, T/O, AAP) 1
Or
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