526
14 CFR Ch. I (1–1–19 Edition)
Pt. 135, App. D
Parameters Range
Installed system
1
minimum
accuracy (to recovered data)
Sampling inter-
val (per second)
Resolution
3
read out
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 (dis-
crete).
High/low ..........................
................................................
1.
Radio transmitter keying (dis-
crete).
On/off ..............................
................................................
1.
Autopilot engaged (discrete) ..
Engaged or disengaged
................................................
1.
SAS status—engaged (dis-
crete).
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 Posi-
tion
4
.
Full range .......................
±
3% .......................................
2 ........................
1%
2
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.
4
For all aircraft manufactured on or after December 6, 2010, the sampling interval per second is 4.
[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; Amdt. 135–113, 73 FR 12570, Mar. 7, 2008; 73 FR 15281, Mar. 21, 2008;
Amdt. 135–121, 75 FR 17047, Apr. 5, 2010]
A
PPENDIX
D
TO
P
ART
135—A
IRPLANE
F
LIGHT
R
ECORDER
S
PECIFICATION
Parameters Range
Accuracy sensor input to
DFDR readout
Sampling inter-
val (per second)
resolution
4
read
out
Time (GMT or Frame
Counter) (range 0 to 4095,
sampled 1 per frame).
24 Hrs .............................
±
0.125% Per Hour ................
0.25 (1 per 4
seconds).
1 sec.
Altitude ....................................
¥
1,000 ft to max certifi-
cated altitude of air-
craft.
±
100 to
±
700 ft (See Table 1,
TSO-C51a).
1 ........................
5
′
to 35
′
1
.
Airspeed .................................
50 KIAS to V
so
, and V
so
to 1.2 V
D
.
±
5%,
±
3% ..............................
1 ........................
1kt
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
°
.........................................
1 ........................
0.5
°
Roll Attitude ............................
±
180
°
..............................
±
2
°
.........................................
1 ........................
0.5
°
.
Radio Transmitter Keying .......
On-Off (Discrete) ............
................................................
1 ........................
Thrust/Power on Each Engine
Full range forward ..........
±
2% .......................................
1 (per engine) ...
0.2%
2
.
Trailing Edge Flap or Cockpit
Control Selection.
Full range or each dis-
crete position.
±
3
°
or as pilot’s indicator ......
0.5 .....................
0.5%
2
.
Leading Edge Flap on or
Cockpit Control Selection.
Full range or each dis-
crete position.
±
3
°
or as pilot’s indicator ......
0.5 .....................
0.5%
2
.
Thrust Reverser Position ........
Stowed, in transit, and
reverse (discretion).
................................................
1 (per 4 sec-
onds per en-
gine).
Ground Spoiler Position/
Speed Brake Selection.
Full range or each dis-
crete position.
±
2% unless higher accuracy
uniquely required.
1 ........................
0.22
2
.
Marker Beacon Passage ........
Discrete ..........................
................................................
1 ........................
Autopilot Engagement ............
Discrete ..........................
................................................
1 ........................
Longitudinal Acceleration .......
±
1g ..................................
±
1.5% max range excluding
datum error of
±
5%.
4 ........................
0.01g.
Pilot Input And/or Surface Po-
sition-Primary Controls
(Pitch, Roll, Yaw)
3
.
Full range .......................
±
2
°
unless higher accuracy
uniquely required.
1 ........................
0.2%
2
.
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