531
Federal Aviation Administration, DOT
Pt. 135, App. F
The recorded values must meet the designated range, resolution and accuracy requirements during static and dynamic condi-
tions. 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
23. Ground Spoil-
er Position or
Speed Brake
Selection
12
.
Full Range or
Each Position
(discrete).
±
2
°
Unless High-
er Accuracy
Uniquely Re-
quired.
1 or 0.5 for air-
planes oper-
ated under
§ 135.152(j).
0.5% of full
range
24. Outside Air
Temperature or
Total Air Tem-
perature
13
.
¥
50
°
C to + 90
°
C.
±
2
°
C .................
2 ........................
0.3
°
C
25. Autopilot/
Autothrottle/
AFCS Mode
and Engage-
ment Status.
A suitable com-
bination of
discretes.
...........................
1 ........................
...........................
Discretes should show which
systems are engaged and
which primary modes are
controlling the flight path
and speed of the aircraft.
26. Radio Alti-
tude
14
.
¥
20 ft to 2,500
ft.
±
2 ft or
±
3%
Whichever is
Greater Below
500 ft and
±
5% Above
500 ft.
1 ........................
1 ft + 5% above
500 ft.
For autoland/category 3 op-
erations. Each radio altim-
eter should be recorded,
but arranged so that at
least one is recorded each
second.
27. Localizer De-
viation, MLS
Azimuth, or
GPS Lateral
Deviation.
±
400 Microamps
or available
sensor range
as installed
±
62
°
.
As installed
±
3%
recommended..
1 ........................
0.3% of full
range.
For autoland/category 3 op-
erations. Each system
should be recorded but ar-
ranged so that at least one
is recorded each second. It
is not necessary to record
ILS and MLS at the same
time, only the approach aid
in use need be recorded.
28. Glideslope
Deviation, MLS
Elevation, or
GPS Vertical
Deviation.
±
400 Microamps
or available
sensor range
as installed.
0.9 to + 30
°
.......
As installed
±
3%
recommended.
1 ........................
0.3% of full
range.
For autoland/category 3 op-
erations. Each system
should be recorded but ar-
ranged so that at least one
is recorded each second. It
is not necessary to record
ILS and MLS at the same
time, only the approach aid
in use need be recorded.
29. Marker Bea-
con Passage.
Discrete ‘‘on’’ or
‘‘off’’.
...........................
1 ........................
...........................
A single discrete is accept-
able for all markers.
30. Master Warn-
ing.
Discrete .............
...........................
1 ........................
...........................
Record the master warning
and record each ‘‘red’’
warning that cannot be de-
termined from other pa-
rameters or from the cock-
pit voice recorder.
31. Air/ground
sensor (primary
airplane system
reference nose
or main gear).
Discrete ‘‘air’’ or
‘‘ground’’.
...........................
1 (0.25 rec-
ommended.).
32. Angle of At-
tack (If meas-
ured directly).
As installed ........
As installed ........
2 or 0.5 for air-
planes oper-
ated under
§ 135.152(j).
0.3% of full
range.
If left and right sensors are
available, each may be re-
corded at 4 or 1 second in-
tervals, as appropriate, so
as to give a data point at 2
seconds or 0.5 second, as
required.
33. Hydraulic
Pressure Low,
Each System.
Discrete or avail-
able sensor
range, ‘‘low’’ or
‘‘normal’’.
±
5% ...................
2 ........................
0.5% of full
range.
34. Groundspeed
As installed ........
Most Accurate
Systems In-
stalled.
1 ........................
0.2% of full
range.
35. GPWS
(ground prox-
imity warning
system).
Discrete ‘‘warn-
ing’’ or ‘‘off’’.
...........................
1 ........................
...........................
A suitable combination of
discretes unless recorder
capacity is limited in which
case a single discrete for
all modes is acceptable.
VerDate Sep<11>2014
08:20 May 17, 2019
Jkt 247048
PO 00000
Frm 00541
Fmt 8010
Sfmt 8002
Y:\SGML\247048.XXX
247048