14 CFR Part 135, Appendix E to Part 135 - Helicopter Flight Recorder Specifications

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There are 6 Updates appearing in the Federal Register for 14 CFR 135. View below or at eCFR (GPOAccess)
View PDF at GPO Pt. 135, App. E
Appendix E to Part 135—Helicopter Flight Recorder Specifications
Parameters Range Accuracy sensor input to DFDR readout Sampling interval (per second) Resolution 2 read out
1 Per cent of full range.
2 This column applies to aircraft manufactured after October 11, 1991.
3 For all aircraft manufactured on or after December 6, 2010, the sampling interval per second is 4.
Time (GMT) 24 Hrs ±0.125% Per Hour 0.25 (1 per 4 seconds) 1 sec
Altitude −1,000 ft to max certificated altitude of aircraft ±100 to ±700 ft (See Table 1, TSO-C51a) 1 5′ to 30′.
Airspeed As the installed measuring system ±3% 1 1 kt
Heading 360° ±2° 1 0.5°.
Normal Acceleration (Vertical) −3g to 6g ±1% of max range excluding datum error of ±5% 8 0.01g
Pitch Attitude ±75° ±2° 2 0.5°
Roll Attitude ±180° ±2° 2 0.5°.
Radio Transmitter Keying On-Off (Discrete) 1 0.25 sec
Power in Each Engine: Free Power Turbine Speed and Engine Torque 0-130% (power Turbine Speed) Full range (Torque) ±2% 1 speed 1 torque (per engine) 0.2% 1 to 0.4% 1
Main Rotor Speed 0-130% ±2% 2 0.3% 1
Altitude Rate ±6,000 ft/min As installed 2 0.2% 1
Pilot Input—Primary Controls (Collective, Longitudinal Cyclic, Lateral Cyclic, Pedal) 3 Full range ±3% 2 0.5% 1
Flight Control Hydraulic Pressure Low Discrete, each circuit 1
Flight Control Hydraulic Pressure Selector Switch Position, 1st and 2nd stage Discrete 1
AFCS Mode and Engagement Status Discrete (5 bits necessary) 1
Stability Augmentation System Engage Discrete 1
SAS Fault Status Discrete 0.25
Main Gearbox Temperature Low As installed As installed 0.25 0.5% 1
Main Gearbox Temperature High As installed As installed 0.5 0.5% 1
Controllable Stabilator Position Full Range ±3% 2 0.4% 1.
Longitudinal Acceleration ±1g ±1.5% max range excluding datum error of ±5% 4 0.01g.
Lateral Acceleration ±1g ±1.5% max range excluding datum of ±5% 4 0.01g.
Master Warning Discrete 1
Nav 1 and 2 Frequency Selection Full range As installed 0.25
Outside Air Temperature −50 °C to 90 °C ±2° c 0.5 0.3° c
[Doc. No. 25530, 53 FR 26154, July 11, 1988; 53 FR 30906, Aug. 16, 1988; Amdt. 135-113, 73 FR 12571, Mar. 7, 2008; 73 FR 15281, Mar. 21, 2008; Amdt. 135-121, 75 FR 17047, Apr. 5, 2010]

Title 14 published on 2014-01-01

The following are only the Rules published in the Federal Register after the published date of Title 14.

For a complete list of all Rules, Proposed Rules, and Notices view the Rulemaking tab.

  • 2014-07-28; vol. 79 # 144 - Monday, July 28, 2014
    1. 79 FR 43619 - Departing IFR/VFR When Weather Reporting Is Not Available
      GPO FDSys XML | Text
      DEPARTMENT OF TRANSPORTATION, Federal Aviation Administration
      Direct final rule; request for comments.
      Effective April 22, 2015. Submit comments on or before September 26, 2014. If we receive an adverse comment or notice of intent to file an adverse comment, we will advise the public by publishing a document in the Federal Register withdrawing the direct final rule before the effective date of the final rule.
      14 CFR Part 135

Title 14 published on 2014-01-01

The following are ALL rules, proposed rules, and notices (chronologically) published in the Federal Register relating to 14 CFR 135 after this date.

  • 2014-07-28; vol. 79 # 144 - Monday, July 28, 2014
    1. 79 FR 43619 - Departing IFR/VFR When Weather Reporting Is Not Available
      GPO FDSys XML | Text
      DEPARTMENT OF TRANSPORTATION, Federal Aviation Administration
      Direct final rule; request for comments.
      Effective April 22, 2015. Submit comments on or before September 26, 2014. If we receive an adverse comment or notice of intent to file an adverse comment, we will advise the public by publishing a document in the Federal Register withdrawing the direct final rule before the effective date of the final rule.
      14 CFR Part 135