How should the radio altimeter warn the crew of its own failure?

The radio altimeter should provide unambiguous warning to the crew of radio altimeter failure.

AMC1 SPA.NVIS.110(b) Equipment requirements for NVIS operations

Q: What type of display presentation should the radio altimeter have for NVIS operations?

The radio altimeter should be of an analogue type display presentation that requires minimal interpretation for both an instantaneous impression of absolute height and rate of change of height.

Q: Where must the radio altimeter be positioned in the cockpit?

The radio altimeter should be positioned to be instantly visible and discernable from each cockpit crew station.

Q: What kind of warning must the radio altimeter have, and at what height does it operate?

The radio altimeter must have an integral audio and visual low height warning that operates at a height selectable by the pilot.

Q: What are the requirements for the visual low height warning at each cockpit crew station?

The visual warning should provide clear visual warning at each cockpit crew station of height below the pilot-selectable height, and adequate attention-getting-capability for typical NVIS operations.

Q: What are the requirements for the audio low height warning?

The audio warning should be unambiguous and readily cancellable, not extinguish any visual low height warnings when cancelled, and operate at the same pilot-selectable height as the visual warning.

Navigate / EASA

Ask question Discover more Add to collection

AMC1 SPA.NVIS.110(b) Equipment requirements for NVIS operations

ED Decision 2012/019/R

RADIO ALTIMETER

(a) The radio altimeter should:

(1) be of an analogue type display presentation that requires minimal interpretation for both an instantaneous impression of absolute height and rate of change of height;

(2) be positioned to be instantly visible and discernable from each cockpit crew station;

(3) have an integral audio and visual low height warning that operates at a height selectable by the pilot; and

(4) provide unambiguous warning to the crew of radio altimeter failure.

(b) The visual warning should provide:

(1) clear visual warning at each cockpit crew station of height below the pilot-selectable height; and

(2) adequate attention-getting-capability for typical NVIS operations.

(1) be unambiguous and readily cancellable;

(2) not extinguish any visual low height warnings when cancelled; and

(3) operate at the same pilot-selectable height as the visual warning.

Details

Source-Title: AMC1 SPA.NVIS.110(b) Equipment requirements for NVIS operations View latest amendments

Erulesid: ERULES-1963177438-13036 Compare versions

Domain: Air operations

Applicabilitydate: 24 October, 2012

Entryintoforcedate: 24 October, 2012

Regulatorysource: ED Decision 2012/019/R Navigate

Regulatorysubject: Part-SPA

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

Parentir: SPA.NVIS.110 Equipment requirements for NVIS operations

Origin: EASA

Category: EAR