What sub-scale setting is required on the pressure altitude instrument, and in what units should it be calibrated?

The sub-scale setting should be calibrated in hectopascals/millibars and adjustable for any barometric pressure likely to be set during flight.

AMC1 NCC.IDE.H.120(a)(3)&NCC.IDE.H.125(a)(3) Operations under VFR & operations under IFR - flight and navigational instruments and associated equipment

Q: For what barometric pressure range must the sub-scale of the pressure altitude instrument be adjustable?

The sub-scale should be adjustable for any barometric pressure likely to be set during flight.

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AMC1 NCC.IDE.H.120(a)(3)&NCC.IDE.H.125(a)(3) Operations under VFR & operations under IFR – flight and navigational instruments and associated equipment

ED Decision 2013/021/R

CALIBRATION OF THE MEANS FOR MEASURING AND DISPLAYING PRESSURE ALTITUDE

The instrument measuring and displaying pressure altitude should be of a sensitive type calibrated in feet (ft), with a sub-scale setting, calibrated in hectopascals/millibars, adjustable for any barometric pressure likely to be set during flight.

Details

Source-Title: AMC1 NCC.IDE.H.120(a)(3)&NCC.IDE.H.125(a)(3) Operations under VFR & operations under IFR - flight and navigational instruments and associated equipment View latest amendments

Erulesid: ERULES-1963177438-13240 Compare versions

Domain: Air operations

Applicabilitydate: 23 August, 2013

Entryintoforcedate: 23 August, 2013

Regulatorysource: ED Decision 2013/021/R Navigate

Regulatorysubject: Part-NCC

Typeofcontent: AMC to IR (Acceptable means of compliance to implementing rule)

Parentir: NCC.IDE.H.120 Operations under VFR - flight and navigational instruments and associated equipment

Origin: EASA

Category: EAR