[Code of Federal Regulations] [Title 14, Volume 2] [Revised as of January 1, 2008] From the U.S. Government Printing Office via GPO Access [CITE: 14CFR135 App C] [Page 1168-1169] TITLE 14--AERONAUTICS AND SPACE CHAPTER I--FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION (CONTINUED) PART 135_OPERATING REQUIREMENTS: COMMUTER AND ON DEMAND OPERATIONS AND RULES GOVERNING PERSONS ON BOARD SUCH AIRCRAFT--Table of Contents Subpart K_Hazardous Materials Training Program Sec. Appendix C to Part 135--Helicopter Flight Recorder Specifications ---------------------------------------------------------------------------------------------------------------- Installed system \1\ minimum Sampling interval Resolution \3\ Parameters Range accuracy (to (per second) read out recovered data) ---------------------------------------------------------------------------------------------------------------- Relative time (from recorded on 25 hr minimum..... 0.125% per hour. [[Page 1169]] Indicated airspeed.............. Vm in to VD (KIAS) 5% or 1 with installed 0 kts., whichever pilot-static is greater. system). Altitude........................ -1,000 ft. to 100 to 7 00 ft. (see Table 1, TSO C51-a). Magnetic heading................ 360[deg].......... 5[deg]. Vertical acceleration........... -3g to +6g........ 0.2g in where peaks, ref. addition to 0 recorded). .3g maximum datum. Longitudinal acceleration....... 1.0g. eq>1.5% max. range excluding datum error of 5%. Pitch attitude.................. 100% of usable 2[deg]. Roll attitude................... 60[deg] or eq>2[deg]. 100% of usable range, whichever is greater. Altitude rate................... 8,000 fpm. eq>10% Resolution 12,000. 250 fpm below 12,000 ft. indicated. Engine Power, Each Engine Main rotor speed................ Maximum range..... 5%. Free or power turbine........... Maximum range..... +5%............... 1................. 1% \2\ Engine torque................... Maximum range..... 5%. Flight Control--Hydraulic Pressure Primary (discrete).............. High/low.......... .................. 1................. Secondary--if applicable High/low.......... .................. 1................. (discrete). Radio transmitter keying On/off............ .................. 1................. (discrete). Autopilot engaged (discrete).... Engaged or .................. 1................. disengaged. SAS status--engaged (discrete).. Engaged/disengaged .................. 1................. SAS fault status (discrete)..... Fault/OK.......... .................. 1................. Flight Controls Collective...................... Full range........ 3%. Pedal position.................. Full range........ 3%. Lat. cyclic..................... Full range........ 3%. Long. cyclic.................... Full range........ 3%. Controllable stabilator position Full range........ 3%. ---------------------------------------------------------------------------------------------------------------- \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\ Per cent of full range. \3\ This column applies to aircraft manufactured after October 11, 1991. [Doc. No. 25530, 53 FR 26152, July 11, 1988; 53 FR 30906, Aug. 16, 1988, as amended by Amdt. 135-69, 62 FR 38397, July 17, 1997]