Pt. 121, App. M 14 CFR Ch. I (1-1-19 Edition) Part 121 section Applicable aircraft Provisions: CFR/FR references Section 121.312(c) .................... Airplane type certificated in accordance with SFAR No. 41; maximum certificated takeoff weight in excess of 12,500 pounds. Section 121.314(a) ................... Transport category airplanes type certificated after January 1, 1958. Compartment interior requirements. 14 CFR 25.853(a) in effect March 6, 1995: 14 CFR parts 1 to 59, Revised as of January 1, 1995, and amended by \n25-83, 60 FR 6623, February 2, 1995. Formerly 14 CFR 25.853(a), (b-1), (b-2), and (b-3) in effect on September 26, 1978: 14 CFR parts 1 to 59, Revised as of January 1, 1978. Class C or D cargo or baggage compartment definition, 14 CFR 25.857 in effect on June 16, 1986, 14 CFR parts 1 to 59, Revised 1/1/97, and amended by Amendment 25-60, 51 FR 18243, May 16, 1986. [Doc. No. 28154, 60 FR 65936, Dec. 20, 1995, as amended by Amdt. 121-269, 63 FR 8049, Feb. 17, 1998] APPENDIX M TO PART 121 - AIRPLANE FLIGHT RECORDER SPECIFICATIONS The recorded values must meet the designated range, resolution and accuracy requirements during static and dynamic conditions. Dynamic condition means the parameter is experiencing change at the maximum rate attainable, including the maximum rate of reversal. All data recorded must be correlated in time to within one second. Parameters Range Accuracy (sensor input) Seconds per sampling interval Resolution Remarks UTC time preferred when available. Count increments each 4 seconds of system operation. Data should be obtained from the air data computer when practicable. 1. Time or relative times counts. 1 24 Hrs, 0 to 4095. Section0.125% per hour. 4 ........................ 1 sec ................. 2. Pressure Altitude. Section1000 ft to max certificated altitude of aircraft. + 5000 ft. 50 KIAS or minimum value to Max Vso to 1.2 V. D. 0-360Section and Discrete - true - or - mag - . Section100 to Section700 ft (see table, TSO C124a or TSO C51a). Section5% and Section3% .... 1 ........................ 5- to 35- ............. 1 ........................ 1 kt .................... Data should be obtained from the air data computer when practicable. Section2Section ..................... 1 ........................ 0.5Section .................... When true or magnetic heading can be selected as the primary heading reference, a discrete indicating selection must be recorded. 5. Normal acceleration (vertical) 9. Section3g to + 6g ...... 0.125 ................. 0.004g. 6. Pitch Attitude .. Section75Section ................... Section1% of max range excluding datum error of Section5%. Section2Section ..................... 0.5Section .................... A sampling rate of 0.25 is recommended. 7. Roll attitude 2 ... Section180Section ................. Section2Section ..................... 0.5 ..................... A sampling rate of 0.5 is recommended. 8. Manual Radio Transmitter Keying or CVR/ DFDR synchronization reference. On-Off (Discrete) None ........................... 1 or 0.25 for airplanes operated under Section 121.344(f). 1 or 0.5 for airplanes operated under Section 121.344(f). 1 ........................ ........................... 9. Thrust/power on each engine - primary flight crew reference. Full range forward. Section2% ................... 1 (per engine) ... 0.3% of full range. Preferably each crew member but one discrete acceptable for all transmission provided the CVR/ FDR system complies with TSO C124a CVR synchronization requirements (paragraph 4.2.1 ED-55). Sufficient parameters (e.g. EPR, N1 or Torque, NP) as appropriate to the particular engine being recorded to determine power in forward and reverse thrust, including potential overspeed condition. 3. Indicated airspeed or Calibrated airspeed. 4. Heading (Primary flight crew reference). 298 VerDate Sep<11>2014 08:20 May 17, 2019 Jkt 247048 PO 00000 Frm 00308 Fmt 8010 Sfmt 8002 Y:\SGML\247048.XXX 247048