HOW TO RECORD IN-FLIGHT PARAMETERS
4.4.2.1.1. Example of CPR<02> for an A319 aircraft fitted with EPR
controlled Engines
A319 CRUISE PERFORMANCE REPORT <02>
A/C
CC AI-001
DATE
feb99
UTC
113412
CODE
5000
FROM
LFBO
TO
LFBO
FLT
05080
C1
PH CNT
06 00514
BLEED STATUS
48 0010 0 0100 48
CE
CN
TAT
N240
N240
EC
EE
ESN
0100003
0100004
N1
N2
EPR
1284
1284
S1
S2
P25
11155
11137
T1
T2
BAF ACC
094 082
096 082
V1
V2
ECW1
03D01
03D01
V3
V4
VB1
024
007
X1
X2
WFQ
02652
02772
ELEV
N003
N001
AOA
0025
0025
SLP
0000
0000
CFPG
N0001
N0000
CIVV
0001
0003
X3
RUDD
0000
RUDT
0008
AILR
N001
AILL
N006
STAB
N008
ROLL
N000
X4
X5
RSP2
N000
0000
RSP3
0000
0000
RSP4
0000
0000
RSP5
0000
0000
FLAP
0000
0000
SLAT
0000
0000
X6
X7
THDG
1905
XXXX
LONP
E0019
E0019
LATP
N450
N450
WS
050
050
ALT
33000.
33000.
CAS
276
276
EHRS
03000
03000
N1
8321
8320
T25
0557
0556
MN
780
780
GW
6500
6500
ECYC
00600
00600
N2
8320
8321
P3
1243
1231
VB2
005
001
EVM
08000
08004
CG DMU/SW
330 I51001
330 I51001
AP QA QE
71 12 12
71
EGT
3580
3580
T3
4313
4324
FF
1283
1283
P49
06150
06142
LP GLE PD TN
00 035 40 180
00 023 36 180
ECW2
00008
00008
APU
0
P125
06892
06892
SVA
069
068
P2
T2
04219 N255
04215 N271
OIP
245
234
OIT
121
120
OIQH
0000
0000
PHA
043
078
WD
011
011
FT
0110
0108
YAW
N000
FD
XXXX
0785
Flight Operations & Line Assistance
68
Getting to Grips with Aircraft Performance Monitoring
HOW TO RECORD IN-FLIGHT PARAMETERS
4.4.2.1.2. Example of CPR<02> for an A319 aircraft fitted with N1
controlled Engines
A319 CRUISE PERFORMANCE REPORT <02>
CC
A/C
AI-001
DATE
feb02
C1
PH
06
CE
CN
TAT
N240
N240
EC
EE
ESN
0100003
0100004
N1
N2
N1
868
868
N1C
869
869
N2
875
875
S1
S2
P25
11155
11137
T25
0557
0556
P3
1243
1231
T3
4313
4324
T1
T2
BAF ACC
094 082
096 082
GLE PD
035 40
023 36
TN
180
180
V1
V2
ECW1
03D01
03D01
EVM
08000
08004
OIP
245
234
V3
V4
VB1
024
007
X1
X2
WFQ
02652
02772
ELEV
N003
N001
AOA
0025
0025
SLP
0000
0000
CFPG
N0001
N0000
CIVV
0001
0003
X3
RUDD
0000
RUDT
0008
AILR
N001
AILL
N006
STAB
N008
ROLL
N000
X4
X5
RSP2
N000
0000
RSP3
0000
0000
RSP4
0000
0000
RSP5
0000
0000
FLAP
0000
0000
SLAT
0000
0000
X6
X7
THDG
1905
XXXX
LONP
E0019
E0019
LATP
N450
N450
WS
050
050
CNT
00514
UTC
110117
CODE
5000
ALT
33000.
33000.
ECW2
00008
00008
VB2
005
001
TO
LFBO
FLT
05080
BLEED STATUS
48 0010 0 0100 48
CAS
276
276
EHRS
03000
03000
LP
00
00
FROM
LFBO
MN
780
780
ECYC
00600
00600
EGT
5850
5850
GW
6500
6500
AP
71
71
APU
0
CG DMU/SW
330 C51001
330 C51001
QA
12
QE
12
FF
1320
1320
PS13
06892
06892
P49
06150
06142
SVA
069
068
P2
T2
04219 N255
04215 N271
OIT
121
120
OIQH
0000
0000
PHA
043
078
WD
011
011
FT
0110
0108
YAW
N000
FD
XXXX
0785
Flight Operations & Line Assistance
Getting to Grips with Aircraft Performance Monitoring
69
HOW TO RECORD IN-FLIGHT PARAMETERS
4.4.2.1.3. Parameters taken from report <02>
Report output
A/C
DATE
FLT
UTC
CODE
APM input
TAILNO
DATE
FLNO
FCASE
-
DMU/SW
CODE
ALT
MN
TAT
ALT
MACH
TAT
GW
CG
CFPG
MASS
CG
FPAC
CIVV
VV
THDG
LATP
WS
WD
FT
FD
THDG
LAT
CWI
DWI
AFT
AFD
ESN
N1 (EPR)
FF
EGT (TGT)
ESN
REG
FFA
EGT
Remarks
Tail Number
Date
Flight Number
Hour/min. taken far case ident
Trigger logic code (see below for details)
Codification example
XXXXXX
AAA99
9999
999999
5000 or 4000 on all flyby-wire aircraft
depending on the engine
type fitted on the aircraft.
For aircraft/engine type check and report XXXXXX
format variations. The last three digits allo X=Engine type (C=cfm, I=IAE)
X=Engine version 1…8
stable frame identification
X=Hardware number 0..9
XXX=Software version(001..009)
Two values read. Enter the mean value.
Standard altitude (eg –500 or 35000 ft)
Mach Number (eg 0.78)
X9999 (eg N0500 or 35000)
Total Air Temperature (eg –10°C)
999 (eg 780)
X999 (eg N100)
Values from two systems read.
Enter the mean value.
9999
Gross Weight
999
Center of gravity
Calculated Flight Path Acceleration
N9999 to 40000
(-0.9999 to 4.0000 g)
Calculated Inertial Vertical Speed
N999 to 0999
(-999 to 999 ft/min)
0000 to 3599
True Heading (0° to 359.9°)
N899 to S899
Latitude (N89.9° to S89.9°)
000 to 100
Wind speed (0 to 100 kt)
000 to 359
Wind direction (0° to 359°)
N600 to 1700
Fuel Temperature (-60.0° to 170°C)
0000 to 0999
Fuel Density (0 to 0.999 kg/l)
for engine 1 to 2
XXXXXX
Engine serial number
0000 to 1200 or 0600 to 1800
N1 (0 to 120%) or EPR(0.6 to 1.8)
0000 to 7000
Fuel flow (0 to 7000 kg/h/eng)
Exhaust gaz Temperature
(-55° to 999.9°C)
N550 to 9999
Flight Operations & Line Assistance
70
Getting to Grips with Aircraft Performance Monitoring
HOW TO RECORD IN-FLIGHT PARAMETERS
Report output APM input
BLEED
WBLL
STATUS“
WBLR
Remarks
Left engine
Righ engine
Eg. 99 0100 0 0010 99
Codification example
99 LH Pack flow 0.99 kg/s
LH Wing AI/V Fully Closed=0
Eng1 NAC AI/V Open=1
Eng 1 PRV Fully Closed=0
Eng 1 HPV Fully Closed=0
Cross Feed V Fully Closed=0
Eng 2 HPV Fully Closed=0
Eng 2 PRV Fully Closed=0
Eng 2 NAC AI/V Open=1
RH Wing AI/V Fully Closed=0
APU
FLHV
Eg. 1
not on report.
99 RH Pack flow 0.99 kg/s
Apu bleed Valve State Open=1
4.4.2.2. Report transmitted by ACARS
As ACARS transmissions are expensive, when the CPR<02> is transmitted to the
ground, the format of the received file is slightly different so as to decrease the
length of the file and its size.
The sample file below is an example of ACARS transmission. It contains two
points recorded for the same aircraft registered AI-002.
- A02/A32102,1,1/CCAI002,APR11,153333,EFOU,EFHK,0368/C106,34201,5000,54,0010,0,0100,54,X/CEN17
3,31019,290,782,7080,242,C73001/CNN171,31053,290,783,7080,242/ECSN0001,00
208,00256,00165,73,33,22/EESN0002,00208,00260,00165,73/N10844,0845,0928,5
947,1428,07947/N20844,0845,0929,5888,1443,07827/S115521,0712,1537,4321,39
80,020,006/S215528,0713,1531,4308,4019,018,002/T1099,096,026,46,045,0
6271,0336/T2099,096,023,46,036,06335,0305/V105,00,287,168,03,00,00000/V20
2,02,135,105,01,00,00000/V3XX,XX,XXX,XXX,XXXX/V4XX,XX,XXX,XXX,XXXX/V511,0
1,283,046,0916/V612,02,182,268,0916/V7044,083,00081,22222222222111/V8043,
082,00061,22222222222111/X102541,N002,0017,0000,00000,0000/X202527,0000,0
014,0000,00000,N000/X3N000,0004,N006,N007,N006,N002,N000/X40000,0000,0000
,0000,0000,0000/X50000,0000,0000,0000,0000,0000/X61891,E0256,N625,056,278
,N000,0807/X71893,E0255,N624,055,279,0001,0806,/
- A02/A32102,1,1/CCAI002,APR11,104839,LFPG,EFHK,0872/C106,33901,5000,50,0010,0,0100,50,X/CEN25
6,37008,256,790,6865,277,C73001/CNN255,37041,256,791,6865,277/ECSN0001,00
205,00253,00163,73,14,07/EESN0002,00205,00257,00163,73/N10868,0868,0934,6
281,1296,06317/N20868,0869,0935,6209,1308,06231/S112372,0668,1325,4367,42
28,001,004/S212375,0670,1321,4360,4253,N00,001/T1099,079,026,42,042,0
4750,0103/T2099,079,022,43,028,04795,0094/V105,02,303,142,03,00,00000/V20
6,02,137,112,01,00,00000/V3XX,XX,XXX,XXX,XXXX/V4XX,XX,XXX,XXX,XXXX/V511,0
1,283,046,0916/V612,02,182,268,0916/V7043,087,00061,22222222222111/V8042,
087,00081,22222222222111/X103612,N003,0022,0000,00004,N000/X203525,N000,0
020,0000,00004,N000/X3N000,0006,N004,N007,N006,0000,N000/X40000,0000,0000
,0000,0000,0000/X50000,0000,0000,0000,0000,0000/X60293,E0074,N543,030,250
,N011,0812/X70293,E0075,N543,028,252,N012,0813,/
Flight Operations & Line Assistance
Getting to Grips with Aircraft Performance Monitoring
71
HOW TO RECORD IN-FLIGHT PARAMETERS
The correspondence between this file and the standard report can be obtained by
tracking the lines identifiers. For instance, the aircraft registration is identified as
A/C in the standard report. It is written on line CC.
In the ACARS-transmitted file, the first characters are:
- A02/A32102,1,1/CCAI-002 […]
Each data is separated by a comma “,”. After a slash “/”, the line identifier is
written. So in this record, we can read AI-002 is the aircraft registration.
4.4.2.3. Report specification
Both Print-like report and ACARS report have been defined in accordance with a
specification.
The exhaustive description of the print-like file is given to the operators in another
part of the Airbus documentation, the Aircraft Maintenance Manual (AMM) in
section 31-36-00. Read Chapter H-Appendix 5 – AMM extracts, Cruise
Performance Report <02> description.
As far as the ACARS format is concerned, no specification is made available to
the customers. Airbus is ready to provide such a description of the ACARS report
upon request.
4.4.3. The trigger logic
A trigger logic is a set of conditions checked before the DMU/FDIMU generates a
report.
There are several trigger logics for the cruise performance report <02>. For
example, one is for the manual selection via the MCDU; another one is for the use
of the remote print button as an order for the data collection.
In particular, trigger logic n°5000 (or 4000 depending on the aircraft model) is
called the best stable frame report logic. This trigger logic aims at detecting stable
flight conditions in order to avoid report triggering in flight phases where
parameters are of no use.
Airbus recommends the use of these reports for aircraft performance-monitoring
purposes.
The AIDS/ACMS Cruise Performance report <02> is generated when the
DMU/FDIMU detects that the conditions defining a stable cruise are met. When
the cruise flight phase is reached, this stability searching is made by monitoring
some aircraft parameters.
When the variation of all these parameters are within a range defined for each one
of them during a customizable time-period, then the stable cruise conditions are
met and the report is generated. If the conditions are not met, the report <02> will
not be generated.
Note that the operator is not allowed to change any of the trigger limits.
Flight Operations & Line Assistance
72
Getting to Grips with Aircraft Performance Monitoring
HOW TO RECORD IN-FLIGHT PARAMETERS
An aircraft quality number characterizes each report. It is defined thanks to the
below formula:
QA =
VAR ( N )
∑W ( N ) × TOL( N )
where
2
N is parameter number N (can be the N1, fuel flow…)
W(N) is a weighing factor (between 0 and 1)
VAR(N) is the individual variance
TOL(N) is the individual variation value
The lower the quality numbers the better the stable frame report. QA varies
between 0 and 999. Common values seen in routine monitoring are around 40.
The quality numbers are not used as a trigger condition but are used to detect the
best report during a searching period.
The operators can use it so as to eliminate possible irrelevant recordings. Most of
the time, quality numbers are not used because it is hard to get some points,
especially for short-range flights.
Example of trigger logic and conditions for an A320 aircraft fitted with IAE engines
The DMU/FDIMU generates the CPR<02> based on flight hours or flight legs. The
choice is programmable via the GSE.
Depending on the basis for searching, the DMU/FDIMU searches in cruise phase
for report generation with stable frame criteria where the best aircraft quality
number is calculated. The report with the best quality number is then stored in the
report buffer.
The basic DMU/FDIMU configuration for the A320 aircraft is:
1. Searching time frame: 1 hour
2. Observed data during five sub-periods of 20 seconds each. The best period is
retained thanks to the quality number.
3. The stability criteria, which must be met are:
Parameter
Inertial Altitude
Ground Speed
Roll Angle
TAT
N2
EGT
Vertical
Acceleration
Mach Number
N1
P2
Fuel Flow
EPR
Limit
150 feet
6 kt
0.8 degrees
1.1 degrees
C
0.9 %
18 degrees
C
0.03 g
0.008 Mach
1.6 %
0.05 psia
100 kg/h
0.035
Flight Operations & Line Assistance
Getting to Grips with Aircraft Performance Monitoring
73