Title 14

PART 135 APPENDIX C


Appendix C to Part 135 - Helicopter Flight Recorder Specifications

14:3.0.1.1.11.14.3.1.38 : Appendix C

Appendix C to Part 135 - Helicopter Flight Recorder Specifications
Parameters Range Installed system 1 minimum accuracy (to recovered data) Sampling interval (per second) Resolution 3 read out
Relative time (from recorded on prior to takeoff) 25 hr minimum ±0.125% per hour 1 1 sec.
Indicated airspeed Vm in to VD (KIAS) (minimum airspeed signal attainable with installed pilot-static system) ±5% or ±10 kts., whichever is greater 1 1 kt.
Altitude −1,000 ft. to 20,000 ft. pressure altitude ±100 to ±700 ft. (see Table 1, TSO C51-a) 1 25 to 150 ft.
Magnetic heading 360° ±5° 1 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) 0.05g.
Longitudinal acceleration ±1.0g ±1.5% max. range excluding datum error of ±5% 2 0.03g.
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°.
Altitude rate ±8,000 fpm ±10% Resolution 250 fpm below 12,000 ft. indicated 1 250 fpm below 12,000.
Engine Power, Each Engine
Main rotor speed Maximum range ±5% 1 1% 2
Free or power turbine Maximum range + 5% 1 1% 2
Engine torque Maximum range ±5% 1 1% 2
Flight Control - Hydraulic Pressure
Primary (discrete) High/low 1
Secondary - if applicable (discrete) High/low 1
Radio transmitter keying (discrete) On/off 1
Autopilot engaged (discrete) Engaged or disengaged 1
SAS status - engaged (discrete) Engaged/disengaged 1
SAS fault status (discrete) Fault/OK 1
Flight Controls
Collective 4 Full range ±3% 2 1% 2
Pedal Position 4 Full range ±3% 2 1% 2
Lat. Cyclic 4 Full range ±3% 2 1% 2
Long. Cyclic 4 Full range ±3% 2 1% 2
Controllable Stabilator Position 4 Full range ±3% 2 1% 2