AWO.B.CATIII.121 CS AWO.B.CATIII.121 General

1 Failures

1.1 Indications and alerts

Failure indications and alerts should be demonstrated. (See AMC 25.1309)

1.2 Effects

For compliance with CS 25.1309, the effects of failure conditions will need to be demonstrated including not only failures of the landing system but also failures in other aeroplane equipment which could affect the landing (e.g. engines, reverse thrust, nose-wheel steering) and failures in the xLS ground facility. Although this demonstration may be done primarily by using a ground simulation, some cases should also be demonstrated in flight to confirm the conclusions of the simulation. (See AMC 25.1309) 2 Crew errors

Individual landings additional to those of AMC AWO.A.ALS.106 paragraph 2.1 should be carried out to demonstrate that errors, which can reasonably be expected to occur, are not hazardous (e.g. asymmetric braking or reverse thrust, incorrect approach speed). (See AMC AWO.A.ALS.106 paragraph 2.2)

[Issue: CS-AWO/2]

When exposure times relevant to failure probability calculations are dependent on flight crew and maintenance checks (i.e. preflight, first flight of the day, pre-land, etc.) and/or inspection intervals for dormant (latent) failures, these tasks, time intervals and the recommended component monitoring programme should be specified in the AFM or maintenance manual as appropriate.

[Issue: CS-AWO/2]

FAILURE CONDITIONS