18. Height‑keeping performance monitoring

A Singapore operator with a special operations approval to conduct RVSM operations must have a programme to monitor the height‑keeping performance of the aeroplanes used for such operations.

For the programme required in paragraph (1), the aeroplanes used for such operations must be grouped by the Singapore operator into 2 groups based on aeroplane type.

For each group mentioned in paragraph (2), the Singapore operator must monitor the height‑keeping performance of —

where the group consists of only one aeroplane — that aeroplane; or

where the group consists of 2 or more aeroplanes — at least 2 aeroplanes,at least once every 2 years or every 1,000 flight hours, whichever period is longer.

A Singapore operator with a special operations approval to conduct RVSM operations must have a programme to monitor the height‑keeping performance of the aeroplanes used for such operations.

For the programme required in paragraph (1), the aeroplanes used for such operations must be grouped by the Singapore operator into 2 groups based on aeroplane type.

For each group mentioned in paragraph (2), the Singapore operator must monitor the height‑keeping performance of —

where the group consists of only one aeroplane — that aeroplane; or

where the group consists of 2 or more aeroplanes — at least 2 aeroplanes,at least once every 2 years or every 1,000 flight hours, whichever period is longer.