If the GBAS is out of service during a low-visibility approach, what is the expected effect on flight operations?

Restricted to non-precision approach (or other precision approach aid if available).

For low-visibility approach and landing, what happens if the outer marker is unserviceable but a published equivalent position is available?

No limitation if replaced by published equivalent position; otherwise, restricted to non-precision approach.

What is the expected effect on flight operations if the glide path is out of service during an ILS approach?

Restricted to non-precision approach (e.g. localiser only).

During low-visibility approach, what is the effect if the DME (as an alternative to marker beacons) is unserviceable?

No limitation if replaced by published equivalent position; otherwise restricted to non-precision approach.

For low-visibility approach and landing, what is the effect if the ILS is downgraded to CAT I?

Flight operations limited to CAT I.

During low-visibility approach, what is the effect if the anemometer is unserviceable but other sources are available?

No effect if other sources available; otherwise, restriction depending on flight operations rules.

What is the effect on flight operations if the ILS is out of service during a low-visibility approach?

Restricted to non-precision approach (or other precision approach aid if available).

For low-visibility approach and landing, what is the effect if the TDZ lighting is unserviceable?

Restriction depending on flight operations rules.

During low-visibility approach, what is the effect if the MLS is out of service?

Restricted to non-precision approach (or other precision approach aid if available).

For low-visibility approach and landing, what is the effect if the approach lighting is unserviceable?

Restriction depending on flight operations rules.

During low-visibility approach, what is the effect if the GBAS is downgraded to CAT II?

Flight operations limited to CAT II.

AMC1 ADR.OPS.B.045(c) Low-visibility procedures

Q: What is the effect on flight operations if the ILS localiser is downgraded to CAT I during a low-visibility departure?

No take-off guidance. Guided take-off not allowed.

Q: During low-visibility departure operations, what is the effect if the touchdown RVR system is unserviceable?

Restrictions depending on flight operations rules.

Q: In low-visibility departure operations, what is the effect of an unserviceable stop bar?

No effect if runway protection is ensured by other means.

Q: If the MLS is downgraded to CAT II during a low-visibility departure, what is the effect?

No take-off guidance. Guided take-off not allowed.

Q: What is the effect on flight operations if the runway centre line lighting is unserviceable during a low-visibility departure?

Restrictions depending on flight operations rules.

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AMC1 ADR.OPS.B.045(c) Low-visibility procedures

ED Decision 2023/003/R

EQUIPMENT FAILURES TO BE REPORTED AND EFFECTS ON FLIGHT OPERATIONS

The following equipment failures should be reported if the system is degraded or unserviceable or if back-up procedures cannot provide the same level of service:

EQUIPMENT FAILURE TO BE REPORTED – LOW-VISIBILITY DEPARTURE OPERATIONS
ILS (Where used for guided take-off)	ILS localiser downgraded to CAT II ILS localiser downgraded to CAT I ILS out of service	No take-off guidance. Guided take-off not allowed No take-off guidance. Guided take-off not allowed No take-off guidance. Guided take-off not allowed
MLS (Where used for guided take-off)	MLS downgraded to CAT II MLS downgraded to CAT I MLS out of service	No take-off guidance. Guided take-off not allowed No take-off guidance. Guided take-off not allowed No take-off guidance. Guided take-off not allowed
GBAS (Where used for guided take-off)	GBAS downgraded to CAT II GBAS downgraded to CAT I GBAS out of service	No take-off guidance. Guided take-off not allowed No take-off guidance. Guided take-off not allowed No take-off guidance. Guided take-off not allowed
RVR	Touchdown RVR system unserviceable Other RVR systems unserviceable	Restrictions depending on flight operations rules Restrictions depending on flight operations rules
LIGHTING SYSTEMS	Runway lighting unserviceable Runway centre line lighting unserviceable Runway edge lighting unserviceable Taxiway lighting system unserviceable	Restrictions depending on flight operations rules Restrictions depending on flight operations rules Restrictions depending on flight operations rules Restrictions depending on flight operations rules
ANCILLARY	Stop bars unserviceable Ceilometer unserviceable Anemometer unserviceable	No effect if runway protection is ensured by other means No effect No effect if other sources available; otherwise restrictions depending on flight operations rules

EQUIPMENT FAILURE TO BE REPORTED – LOW-VISIBILITY DEPARTURE OPERATIONS

SYSTEM CONSIDERED

FAILURE TO BE REPORTED

EFFECT ON FLIGHT OPERATIONS

ILS

(Where used for

guided take-off)

ILS localiser downgraded to CAT II

ILS localiser downgraded to CAT I

ILS out of service

No take-off guidance. Guided take-off not allowed

MLS

(Where used for

guided take-off)

MLS downgraded to CAT II

MLS downgraded to CAT I

MLS out of service

No take-off guidance. Guided take-off not allowed

GBAS

(Where used for

guided take-off)

GBAS downgraded to CAT II

GBAS downgraded to CAT I

GBAS out of service

No take-off guidance. Guided take-off not allowed

RVR

Touchdown RVR system unserviceable

Other RVR systems unserviceable

Restrictions depending on flight operations rules

LIGHTING SYSTEMS

Runway lighting unserviceable

Runway centre line lighting unserviceable

Runway edge lighting unserviceable

Taxiway lighting system unserviceable

Restrictions depending on flight operations rules

ANCILLARY

Stop bars unserviceable

Ceilometer unserviceable

Anemometer unserviceable

No effect if runway protection is ensured by other

means

No effect

No effect if other sources available; otherwise restrictions depending on flight operations rules

EQUIPMENT FAILURE TO BE REPORTED – APPROACH AND LANDING OPERATIONS
SYSTEM CONSIDERED	FAILURE TO BE REPORTED	EXPECTED EFFECT ON FLIGHT OPERATIONS
ILS	ILS downgraded to CAT II ILS downgraded to CAT I ILS out of service Outer marker unserviceable Glide path out of service	Flight operations limited to CAT II Flight operations limited to CAT I Restricted to non-precision approach (or other precision approach aid if available) No limitation if replaced by published equivalent position; otherwise, restricted to non-precision approach Restricted to non-precision approach (e.g. localiser only)
MLS	MLS downgraded to CAT II MLS downgraded to CAT I MLS out of service	Flight operations limited to CAT II Flight operations limited to CAT I Restricted to non-precision approach (or other precision approach aid if available)
GBAS	GBAS downgraded to CAT II GBAS downgraded to CAT I GBAS out of service	Flight operations limited to CAT II Flight operations limited to CAT I Restricted to non-precision approach (or other precision approach aid if available)
DME	DME (as alternative to marker beacons) unserviceable	No limitation if replaced by published equivalent position; otherwise restricted to non-precision approach
RVR	Touchdown RVR system unserviceable Other RVR systems unserviceable	Restriction depending on flight operations rules Restriction depending on flight operations rules
LIGHTING SYSTEMS	Approach lighting unserviceable Runway lighting unserviceable Runway centre line lighting unserviceable Runway edge lighting unserviceable TDZ lighting unserviceable Taxiway lighting system unserviceable	Restriction depending on flight operations rules Restriction depending on flight operations rules Restriction depending on flight operations rules Restriction depending on flight operations rules Restriction depending on flight operations rules Restriction depending on flight operations rules
ANCILLARY	Stop bars unserviceable Ceilometer unserviceable Anemometer unserviceable	No effect if runway protection is ensured by other means No effect No effect if other sources available; otherwise, restriction depending on flight operations rules

Details

Source-Title: AMC1 ADR.OPS.B.045(c) Low-visibility procedures View latest amendments

Erulesid: ERULES-1963177438-19626 Compare versions

Domain: Aerodromes

Amendedby: Amendment 8

Applicabilitydate: 29 March, 2023

Entryintoforcedate: 29 March, 2023

Regulatorysource: ED Decision 2023/003/R Navigate

Regulatorysubject: Part-ADR.OPS

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

Parentir: ADR.OPS.B.045 Low-visibility procedures

Origin: EASA

Category: EAR