TEI（文本元素标示符）

| 符号 | 意义 |

|---|---|

| AC | Estimated time approach clearance(HHMM) |

| DS | Destination Station |

| AD | Aerodrome of concern or arrival |

| DA | Aerodrome of departure |

| AL | Altitude or flight level |

| DT | Communication service information |

| AN | Aircraft number (7C) |

| FB | Fuel On Board |

| AR | Arrival runway |

| FI | Flight Identifier |

| BF | Boarded fuel |

| IN | time |

| OFF | Time |

| ON | On Time |

| NP | Next Point |

| OT | Out Time |