AMC3 SPA.LVO.100(b) Low-visibility operations
and operations with operational credits
INSTRUMENT APPROACH OPERATIONS IN LOW-VISIBILITY CONDITIONS — EFFECT ON LANDING MINIMA OF TEMPORARILY FAILED OR DOWNGRADED EQUIPMENT FOR APPROACH OPERATIONS
(a) Only those facilities mentioned in Table 6 should be acceptable to be used to determine the effect of temporarily failed of downgraded equipment on the required RVR for CAT II/III approach operations.
(b) The following conditions should be applied to Table 6:
(1) multiple failures of runway/FATO lights other than those indicated in Table 6 are not acceptable;
(2) failures of approach and runway/FATO lights are acceptable at the same time, and the most demanding consequence should be applied;
(3) for approach operations with a DH below 200 ft, a combination of deficiencies in runway/FATO lights and RVR assessment equipment are not permitted; and
(4) failures other than ILS, GLS and MLS affect RVR only and not DH.
Table 6
Failed or
downgraded equipment — effect on landing minima
CAT II/III
operations
|
Failed
or downgraded equipment |
Effect
on landing minima |
|||
|
CAT
III no DH |
CAT
III DH<50 ft |
CAT
III |
CAT
II |
|
|
Navaid stand-by transmitter |
Not allowed |
RVR 200 m |
No effect |
|
|
Outer marker (ILS) |
No effect if the required height versus glide path can be checked using other means, e.g. DME fix |
|||
|
Middle marker (ILS) |
No effect |
|||
|
DME |
No effect if replaced by RNAV (GNSS) information or the outer marker |
|||
|
RVR assessment systems |
At least one RVR value to be available on the aerodrome |
On runways equipped with two or more RVR assessment units, one may be inoperative |
||
|
Approach lights |
No effect |
Not allowed for operations with DH >50 ft |
Not allowed |
|
|
Approach lights except the last 210 m |
No effect |
Not allowed |
||
|
Approach lights except the last 420 m |
No effect |
|||
|
Standby power for approach lights |
No effect |
|||
|
Standby power for runway lights with 1-second switchover time |
No effect |
Not allowed |
Day: RVR 550 m |
Day: RVR 550 m |
|
No effect |
Night: RVR 550 m |
Night: RVR 550 m |
||
|
Edge lights |
No effect |
Day: no effect |
Day: no effect |
Day: no effect |
|
Night: RVR 550 m |
Night:
RVR 550 m |
Night: not allowed |
||
|
Threshold lights |
No effect |
No effect |
Day:
no effect |
Day:
no effect |
|
Night: RVR 550 m |
Night: not allowed |
|||
|
Runway end lights |
No effect if centre line lights are serviceable |
|||
|
Centre line lights |
Day: RVR 200 m |
Not allowed |
Day: RVR 300 m |
Day: RVR 350 m |
|
Night: not allowed |
Night: RVR 400 m |
Night: RVR 550 m (400 m with HUD or auto-land) |
||
|
Centre line lights spacing increased to 30 m |
RVR 150 m |
No effect |
||
|
TDZ lights |
No effect |
Day: RVR 200 m |
Day: RVR 300 m |
|
|
Night: RVR 300 m |
Night: RVR 550 m, 350 m with HUD or auto-land |
|||
|
Taxiway light system |
No effect |
|||
Table 7
Failed or
downgraded equipment — effect on landing minima
Operational
credits
|
Failed or downgraded equipment |
Effect on landing minima |
||||
|
SA CAT I |
SA CAT II |
EFVS-A |
EFVS-L |
||
|
Navaid stand-by transmitter |
No effect |
||||
|
Outer marker (ILS) |
No effect if replaced by height check at
1 000 ft |
||||
|
Middle marker (ILS) |
No effect |
||||
|
RVR assessment systems |
On runways equipped with two or more RVR
assessment units, one may be inoperative |
||||
|
Approach lights |
As per Table 8 |
As per Table 9 |
As per IAP |
As per IAP |
|
|
Approach lights except the last 210 m |
As per Table 8 |
As per Table 9 |
As per IAP |
As per IAP |
|
|
Approach lights except the last 420 m |
As per Table 8 |
As per Table 9 |
As per IAP |
As per IAP |
|
|
Standby power for approach lights |
No effect |
||||
|
Edge lights |
Day: No effect |
Day: no effect |
As per IAP |
As per IAP |
|
|
Night: not allowed |
Night: |
As per IAP |
As per IAP |
||
|
Threshold lights |
Day: No effect |
Day: no effect |
As per IAP |
As per IAP |
|
|
Night: not
allowed |
Night: |
As per IAP |
As per IAP |
||
|
Runway end lights |
No effect if centre line lights are serviceable |
As per IAP |
|||
|
Centre line lights |
Day: RVR 400 m |
Day: RVR 350 m |
As per IAP |
As per IAP |
|
|
Night: |
Night: |
As per IAP |
As per IAP |
||
|
Centre line lights spacing increased to
30 m |
No effect |
No effect |
As per IAP |
As per IAP |
|
|
TDZ lights |
Day: no effect |
Day: |
As per IAP |
||
|
Night: no effect |
Night: |
As per IAP |
|||
|
Taxiway light system |
No effect |
||||
EASA regulations detail how failed or downgraded equipment affects landing minima during low visibility operations, specifically CAT II/III approaches. The rules outline acceptable equipment failures and their impact on required Runway Visual Range (RVR) and decision height, considering approach lights, runway lighting, and RVR assessment systems.
* Summary by Aviation.Bot - Always consult the original document for the most accurate information.
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