14 C.F.R. Appendix E to Part 91—Airplane Flight Recorder Specifications
Title 14 - Aeronautics and Space
[Doc. No. 18334, 54 FR 34327, Aug. 18, 1989]
Title 14: Aeronautics and Space
PART 91—GENERAL OPERATING AND FLIGHT RULES
Subpart K—Fractional Ownership Operations
Appendix E to Part 91—Airplane Flight Recorder Specifications
---------------------------------------------------------------------------------------------------------------- Installed system \1\ minimum Sampling interval Resolution \4\ Parameters Range accuracy (to (per second) read out recovered data)----------------------------------------------------------------------------------------------------------------Relative Time (From Recorded on 8 hr minimum...... ±0.125% per 1................. 1 sec. Prior to Takeoff). hour.Indicated Airspeed.............. Vso to VD (KIAS).. ±5% or 1................. 1% \3\ ±10 kts., whichever is greater. Resolution 2 kts. below 175 KIAS.Altitude........................ -1,000 ft. to max ±100 to 11................ 25 to 150 ft. cert. alt. of A/C. ±700 ft. (see Table 1, TSO C51-a).Magnetic Heading................ 360°.......... ±5°.... 1................. 1°Vertical Acceleration........... -3g to +6g........ ±0.2g in 4 (or 1 per second 0.03g. addition to where peaks, ref. ±0.3g to 1g are maximum datum. recorded).Longitudinal Acceleration....... ±1.0g...... ±1.5% max. 2................. 0.01g. range excluding datum error of ±5%.Pitch Attitude.................. 100% of usable.... ±2°.... 1................. 0.8°Roll Attitude................... ±60° or ±2°.... 1................. 0.8° 100% of usable range, whichever is greater.Stabilizer Trim Position, or.... Full Range........ ±3% unless 1................. 1% \3\ higher uniquely required.Pitch Control Position..........Engine Power, Each Engine: Full Range........ ±3% unless 1................. 1% \3\ higher uniquely required. Fan or N \1\ Speed or EPR or Maximum Range..... ±5%........ 1................. 1% \3\ Cockpit indications Used for Aircraft Certification OR. Prop. speed and Torque .................. .................. 1 (prop Speed).... 1%\3\ (Sample Once/Sec as Close 1 (torque)........ 1% \3\ together as Practicable).Altitude Rate \2\ (need depends ±8,000 fpm. ±10%. 1................. 250 fpm. below on altitude resolution). Resolution 250 12,000 fpm below 12,000 ft. indicated.Angle of Attack \2\ (need -20° to ±2°.... 1................. 0.8%\3\ depends on altitude resolution). 40° or 100% of usable range.Radio Transmitter Keying On/Off............ .................. 1................. (Discrete).TE Flaps (Discrete or Analog)... Each discrete .................. 1................. position (U, D, T/ O, AAP) OR.LE Flaps (Discrete or Analog)... Analog 0-100% ±3%........ 1................. 1%\3\ range. Each discrete .................. 1................. position (U, D, T/ O, AAP) OR.Thrust Reverser, Each Engine Analog 0-100% ±3°.... 1................. 1%\3\ (Discrete). range. Stowed or full reverse.Spoiler/Speedbrake (Discrete)... Stowed or out..... .................. 1.................Autopilot Engaged (Discrete).... Engaged or .................. 1................. Disengaged.----------------------------------------------------------------------------------------------------------------\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 also be recorded. If however, altitude is recorded at a minimum resolution of 25 feet, then these two parameters can be omitted.\3\ Per cent of full range.\4\ This column applies to aircraft manufactured after October 11, 1991.
