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3. Inspections of flight data and
cockpit voice recorder systems
3.1 Prior to the first flight of the day, the built-in test
features on the flight deck for the CVR, FDR and Flight Data
Acquisition Unit (FDAU), when installed, should be
monitored.
3.2 Annual inspections should be carried out as follows:
1.2.2 The preferred track allocation is as follows:
Track I - co-pilot headphones and live boom
microphone
a) the readout of the recorded data from the FDR and CVR
should ensure that the recorder operates correctly for the
nominal duration of the recording;
Attachment A Annex 6 - Operation of Aircraft
b) the analysis of the mR should evaluate the quality of
the recorded data to determine if the bit error .rate is
within acceptable limits and to determine the nature and
distribution of the errors:
c) a complete flight from the FDR should be examined in
engineering units to evaluate the validity of all recorded
parameters. Particular attention should be given to
parameters from sensors dedicated to the FDR.
Parameters taken from the aircraft's electrical bus
system need not be checked if their serviceability can be
detected by other aircraft systems;
d) the readout facility should have the necessary software
to accurately convert the recorded values to engineering
units and to determine the status of discrete signals;
e) an annual examination of the recorded signal on the
CVR should be carried out by replay of the CVR
recording. While installed in the aircraft the CVR should
record test signals from each aircraft source and from
relevant external sources to ensure that all required
signals meet intelligibility standards; and
f) where practicable, during the annual examination, a
sample of in-flight recordings of the CVR should be
examined for evidence that the intelligibility of the
signal is acceptable.
3.3 Flight recorder systems should be considered
unserviceable if there is a significant period of poor quality
data, unintelligible signals, or if one or more of the mandatory
parameters is not recorded correctly.
3.4 A report of the annual inspection should be made
available on request to the State's regulatory authority for
monitoring purposes.
3.5 Calibration of the FDR system:
a) the FDR system should be re-calibrated at least every
five years to determine any discrepancies in the
engineering conversion routines for the mandatory
parameters, and to ensure that parameters are being
recorded within the calibration tolerances; and
b) when the parameters of altitude and airspeed are
provided by sensors that are dedicated to the FDR
system, there should be a re-calibration performed as
recommended by the sensor manufacturer, or at least
every two years.
Annex 6 - Operation of Aircrafl Part II
Table A-1
Parameters for Flight Data Recorders
Serial
number Parameter
Recording Accuracy limits
interval (sensor input compared
Measurement range (seconds) to FDR read-out)
1 Time (UTC when available, 24 hours
otherwise elapsed time)
3 Indicated airspeed
4 B.125% per hour
-300 m (-1 000 ft) to 1 ?30 m to GO0 m
maximum certificated (f100 ft to k700 ft)
altitude of aircraft
+I 500 m (+5 000 it)
95 km/h (50 kt) to max 1 fi%
V', (Note I )
Vs, to 1.2 VD (Note 2) k3%
4 Heading 360" 1 an
5 Normal acceleration -3 g to +6 g 0.125 f 1 % of maximum range
excluding datum error of *5%
6 Pitch attitude k75" 1 e0
7 Roll attitude f180° 1 k 2 O
8 Radio transmission keying On-off (one discrete) 1
9 Power on each engine Full range
(Note 3)
10 Trailing edge flap or cockpit Full range or each
control selection discrete position
11 Leading edge flap or cockpit Full range or each
control selection discrete position
1 (per la%
engine)
2 &5% or as pilot's indicator
2 f5% or as pilot's indicator
12 Thrust reverser position Stowed, in transit, and 1 (per
reverse engine)
13 Ground spoiierlspeed brake Full range or each discrete 1 k2% unless higher accuracy
selection position uniquely required
14 Outside air temperature Sensor range 2 S0C
1 S Autopilot/auco A suitable combination of I
throttle/AFCS discretes
mode and engagement status
Note.- The preceding 15 parameters satisfy the requirimenn for a Type i(I FDR.
16 Longitudinal acceleration &1 g
17 Lateral acceieration fl g
18 Pilor input andlor control Full range
surface position-primary
controls (pitch, roll, yaw)
(Note 41
0.25 k1.596 max range excluding datum
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