1.304 Large height deviation (LHD) in RVSM airspace

DESCRIPTION:

​Number of LHDs occurring when an aircraft overshoots its target level by more than 300 ft.

STRATEGIC OBJECTIVE:

Aviation Safety

INDICATOR TYPE:

Outcome-related (Reactive or Lagging)

RATIONALE:

​This indicator helps identify and classify LHDs in order to assess vertical collision risk due to lack of RVSM height keeping performance. System performance monitoring is necessary to ensure that the continued operation of RVSM meets safety objectives.

LIMITATIONS:

​This indicator is only applicable in Reduced Vertical Separation Minimum (RVSM) airspace.
Also, aircrafts must be equipped with automatic dependent surveillance broadcast (ADS-B) transmitter or a quick access recorder (QAR).

CALCULATION METHOD/FORMULA:

​N/A

REFERENCES:

1.304 Large Height Deviation (LHD) in RVSM Airspace.pdf