AWOPS Requirements for landing
Thread Starter
Joined: Jun 2005
Posts: 2
Likes: 0
From: Atlantis.
AWOPS Requirements for landing
Hi Guys,
I have an area of uncertainty in RVR requirements for landing. I do know that for a CAT2 Landing the Touch down zone RVR is mandatory. For CAT 3 we require the Toch down and mid point . the mid can be replaced by the rollout iif the mid reporting rvr is u/s. My company is JAR-OPS Compliant and what confuses me is a table which looks like this
RVR Touch Down Mid Rollout
CAT2 300M 75M 75M
CAT3A 200M 75M 75M
Does this mean that if these values are given to us then we determine the RVR for the Approach based on the above values in the table ??
Please help.
Vik 300
I have an area of uncertainty in RVR requirements for landing. I do know that for a CAT2 Landing the Touch down zone RVR is mandatory. For CAT 3 we require the Toch down and mid point . the mid can be replaced by the rollout iif the mid reporting rvr is u/s. My company is JAR-OPS Compliant and what confuses me is a table which looks like this
RVR Touch Down Mid Rollout
CAT2 300M 75M 75M
CAT3A 200M 75M 75M
Does this mean that if these values are given to us then we determine the RVR for the Approach based on the above values in the table ??
Please help.
Vik 300
Joined: Apr 2006
Posts: 28
Likes: 0
From: Switzerland
Hi Vik
Reading your post, I'm not sure just what your question is exactly. The figures you show in the table are the minimum RVR values required for those particular approaches(unless higher specified on approach plates).
To make an approach to either CAT II or IIIA you must have at least those values shown or better.
As a side note, midpoint and stop-end values to be consideredonly if aircraft speed on that part is greater than 60kts.
I hope this answers the question, but if not, ask again and I'll try again
This is written from a Flight dispatchers point of view and understanding of JAR-OPS, as we also operate to JAR-OPS.
Regards Expat
Reading your post, I'm not sure just what your question is exactly. The figures you show in the table are the minimum RVR values required for those particular approaches(unless higher specified on approach plates).
To make an approach to either CAT II or IIIA you must have at least those values shown or better.
As a side note, midpoint and stop-end values to be consideredonly if aircraft speed on that part is greater than 60kts.
I hope this answers the question, but if not, ask again and I'll try again
This is written from a Flight dispatchers point of view and understanding of JAR-OPS, as we also operate to JAR-OPS.
Regards Expat
Joined: Feb 2006
Aviation Qualifications: ATPL
Posts: 490
Likes: 15
From: USA
Expat --
Per the Advisory Circular excerpted below, FAA considers mid and rollout readings as advisory-only information.
Do JAR-OPS specify the method to be used by the operator to determine if the aircraft speed will be < 60 kts (Indicated or GS?) at the end of the TDZ?
Thanks,
Zeffy
AC 120-29A Appendix 7:
Per the Advisory Circular excerpted below, FAA considers mid and rollout readings as advisory-only information.
Do JAR-OPS specify the method to be used by the operator to determine if the aircraft speed will be < 60 kts (Indicated or GS?) at the end of the TDZ?
Thanks,
Zeffy
AC 120-29A Appendix 7:
e. Required RVR Reporting Equipment. The certificate holder shall not conduct any CAT II operation, unless the following RVR reporting systems are installed and operational for the runway of intended landing:
(1) For authorized landing minimums not less than RVR 1600, the touchdown zone RVR reporting system is required and must be used. This RVR report is controlling for all operations.
(1) For authorized landing minimums not less than RVR 1600, the touchdown zone RVR reporting system is required and must be used. This RVR report is controlling for all operations.
(2) For authorized landing minimums less than RVR 1600, the touchdown zone and the rollout RVR reporting systems are required and must be used. The touchdown zone RVR report is controlling for all operations and the rollout RVR report provides advisory information to pilots. The mid RVR report (if available) provides advisory information to pilots and may be substituted for the rollout RVR report if the rollout RVR report is not available.
Joined: Apr 2006
Posts: 28
Likes: 0
From: Switzerland
Zeffy
No, not that I can find. This is probably why here, at least in my company, we always consider mid-point and/or stop-end RVR. Not an ideal situation I know, but it's not something I've ever seen in chart or written form. I imagine the work to calculate for each aircraft type, at each airport for each rwy under given rwy conditions at varying landing weight would be a massive undertaking.
This is how we here at my company interpret the rule, maybe someone else could give a different viewpoint.
Regards Expat
No, not that I can find. This is probably why here, at least in my company, we always consider mid-point and/or stop-end RVR. Not an ideal situation I know, but it's not something I've ever seen in chart or written form. I imagine the work to calculate for each aircraft type, at each airport for each rwy under given rwy conditions at varying landing weight would be a massive undertaking.
This is how we here at my company interpret the rule, maybe someone else could give a different viewpoint.
Regards Expat
Joined: Oct 2004
Posts: 10
Likes: 0
From: Kazakhstan
See JAR-OPS 1.405 please!
(f) "The touch - down zone RVR is always controlling. If reported and relevant, the mid point and stop end RVR are also controlling. The minimum RVR value for the mid point is 125 m or the RVR required for the touch down zone if less and 75 m for the stop end. For aeroplanes equipped with a roll-out guidance or control system, the minimum RVR value for the mid point is 75 m.
Vik, you are right.
Some states or airlines use rule - stop end RVR is for advisory only.
Regards
(f) "The touch - down zone RVR is always controlling. If reported and relevant, the mid point and stop end RVR are also controlling. The minimum RVR value for the mid point is 125 m or the RVR required for the touch down zone if less and 75 m for the stop end. For aeroplanes equipped with a roll-out guidance or control system, the minimum RVR value for the mid point is 75 m.
Vik, you are right.
Some states or airlines use rule - stop end RVR is for advisory only.
Regards
