(一)CDU查看ACMS报文
如果飞机上安装的是新件号 2233000-916的 DFDAU(旧的是 2233000-816-1),查看ACMS报文界面如下:
1. 按压MENU,进入主菜单页面。选择 ACMS
2. 出现DFDAU主菜单,选择 REPORTS
3. 查看最后航段报文,选择 DSP LAST FLT
可以看出,我查的这架飞机最后一段有这些报文:
而我们需要的着陆报是AHMLAND,在第2页:
注1:软件或者最后一段报文多少不同,AHMLAND出现的页码可能会不一样。
注2:优先选择AHMLAND报,参数比LANDINGRPT多,采样率也高。
选择对应左侧航选键:
注:这张图是进入LANDINGRPT的界面。
按压PRINTER,就可以将AHMLAND报打印出来查看了▼
注意,按压PRINTER打印出报文内容。如果按压PRINT,就是打印出当前页面了▼
(二)LANDING 报文参数说明
除了前面分享的那个ACMS参数说明文件以外,还可以利用AHM上的参数说明来解读报文。
从上图可以看出,AHMLAND 为058号报文,我们可以直接从AHM上找到它:
↑ 直接从AHM上找到737 AHM Landing Report - 058A8104
它和飞机上打印出来的是一摸一样的哦,因为他们本来就是一个东西。
往下拉,就是报文参数的具体说明:
ACID:机号
FLTNO:航班号
DATE:航段开始日期和时间(OOOI OUT时间)
DEP:出发航站
ARR:到达航站
TRANSMIT DATE :报文发送时间
MESSAGE DATE:报文生成时间
ACTUAL GROSS WEIGHT AT LANDING:着陆时的实际总重。
很多参数其实都很好懂,下面简单说明下:
IVV:惯导来的垂直速度
VAC:垂直加速度
MAX VAC RPT:Maximum vertical acceleration for the data collection sequence,帧数据采集到的最大垂直加速度
MAX VAC LAND:Maximum vertical acceleration at landing,着陆最大垂直加速度
MAX VAC -1:Maximum vertical acceleration one second before landing,着陆前一秒最大垂直加速度
MIN VAC RPT:Minimum vertical acceleration for the data collection sequence,帧数据采集到的最小垂直加速度
MIN VAC LAND:Minimum vertical acceleration at landing,着陆最小垂直加速度
MIN VAC -1:Minimum vertical acceleration one second before landing,着陆前一秒最小垂直加速度
GLIDESLOPE:Glideslope deviation,下滑道偏差
WINDSPD:Wind speed,风速
WINDIR:Wind direction true (FMC) corrected,风向
LAT:IRU latitude direction,纬度
LONG:IRU longitude direction,经度
DRIFT:Drift angle,偏流角
HDG:Selected heading (IRU) corrected to 360,航向
WINDSHEAR:是否有风切变,1=YES,0=NO
ENG L N1:左发N1
ENG R N1:右发N1
(前面的数字是前缘襟翼/缝翼号)
SLATS FULL:Slats fully extended,缝翼全伸出,1=true, 0=false
SLATS MID:Slats extended,缝翼伸出,1=true, 0=false
SLATS TRANS:Slats transitioning,缝翼过渡中,1=true, 0=false
FLAPS FULL:Flaps fully extended,前缘襟翼全伸出,1=true, 0=false
FLAPS TRANS:Flaps transitioning,前缘襟翼过渡中,1=true, 0=false
ELEV POS:Elevator position,升降舵位置
FLAP:Trailing edge flap position,后缘襟翼位置
AIL:Aileron position,副翼位置
RUDD POS:Rudder position,方向舵位置
STAB POS:Stabilizer position,水平安定面位置
SEC:GMT seconds,秒
VAC:Vertical acceleration,垂直加速度。根据采样率不同,1秒钟采集8个数据就是VAC7-6-5-4-3-2-1-0,1秒钟采集4个数据就是从VAC6-4-2-0(软件版本不一样,显示的可能也不一样)
MAX:Maximum vertical acceleration over all samples in second,每秒采样里的最大值(-816的DFDAU没有此参数)
这里 MAX VAC和 MAX VAC LAND 是一个值。
RALT:Radio altitude,无线电高度
PITCH:Pitch angle,俯仰角
ROLL:Roll angle,滚转角
AOA:Angle of attack,攻角/迎角
CAS:Computed airspeed,计算得到的空速
GS:Ground speed,地速
WOW:Weight on wheels,接地信号,四个参数依次代表是Airborne-Nose-Left-Right,飞机-前起-左主起-右主起。1=ground,0=air(飞机1是空,0是地)
机型代码:
SFP:短跑道构型
(三)波音原文
可以直接从AHM模块的报警中下载到:
之前AHM上很多报文都没有挂说明文件,我给波音发了个SR,波音回复正在清理这些没有说明描述的报文。
今天登陆一看,果然报文都将说明文字内嵌进去了。
这服务态度和效率
Report Data
Acronym | Description | Units |
---|---|---|
AID | Aircraft identifier | Text |
DATE | Date the report was generated | DD-Mon-YYYY |
GMT | Time the report was generated | HH:MM |
FNO | Frame number | Text |
ISFC | Input subframe count | Text |
FLT | Flight number | Text |
DEPT | Departure airport | Text |
DEST | Destination (arrival) airport | Text |
MODE | Flight mode | Text |
SID | Software database version | Text |
AIRPLANE TYPE | Airplane type code (see definitions table below) | Text |
IVV | Inertial vertical speed | Feet/minute |
VAC | Vertical acceleration | G’s |
MAX VAC RPT | Maximum vertical acceleration for the data collection sequence | G’s |
MAX VAC LAND | Maximum vertical acceleration at landing | G’s |
MAX VAC -1 | Maximum vertical acceleration one second before landing | G’s |
MIN VAC RPT | Minimum vertical acceleration for the data collection sequence | G’s |
MIN VAC LAND | Minimum vertical acceleration at landing | G’s |
MIN VAC -1 | Minimum vertical acceleration one second before landing | G’s |
GLIDESLOPE | Glideslope deviation | Text |
WINDSPD | Wind speed | Knots |
WINDIR | Wind direction true (FMC) corrected | Degrees |
LAT | IRU latitude direction | Degrees |
LONG | IRU longitude direction | Degrees |
DRIFT | Drift angle | Degrees |
HDG | Selected heading (IRU) corrected to 360 | Degrees |
WINDSHEAR | 1=yes, 0=no | |
ENG L N1 | Percentage of max speed (rpm), gas generator section, left engine | %Rotations per minute |
ENG R N1 | Percentage of max speed (rpm), gas generator section, right engine | %Rotations per minute |
SLATS FULL | Slats fully extended | 1=true, 0=false |
SLATS MID | Slats extended | 1=true, 0=false |
SLATS TRANS | Slats transitioning | 1=true, 0=false |
FLAPS FULL | Flaps fully extended | Degrees |
FLAPS TRANS | Flaps transitioning | Degrees |
ELEV POS | Elevator position | Degrees |
FLAP | Trailing edge flap position | Degrees |
AIL | Aileron position | Degrees |
RUDD POS | Rudder position | Degrees |
STAB POS | Stabilizer position | Degrees |
SEC | GMT seconds | Seconds |
VAC | Vertical acceleration | G’s |
MAX | Maximum vertical acceleration over all samples in second | G’s |
RALT | Radio altitude | Feet |
PITCH | Pitch angle | Degrees |
ROLL | Roll angle | Degrees |
AOA | Angle of attack | Degrees |
CAS | Computed airspeed | Knots |
GS | Ground speed | Knots |
WOW | Weight on wheels | Airborne-Nose-Left-Right Airborne(1=in air,0=on ground) Nose gear(1=ground,0=air) Left main gear(1=ground,0=air) Right main gear(1=ground,0=air) |
Airplane Type Codes
Code | Description |
---|---|
600 | 737-600 |
6SFP | 737-600 Short Field Performance |
700 | 737-700 |
7SFP | 737-700 Short Field Performance |
700C | 737-700 Cargo |
7CSFP | 737-700 Cargo Short Field Performance |
700I | 737-700 Increased Gross Weight |
7ISFP | 737-700 Increased Gross Weight Short Field Performance |
800 | 737-800 |
8SFP | 737-800 Short Field Performance |
900 | 737-900 |
9SFP | 737-900 Short Field Performance |
9ER | 737-900 Extended Range |
INV | Airplane Type Selection Invalid |