RVR
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RVR
Hello,
Am I correct in thinking that you need all three segment RVRs for a LVP take off, and a CAT 3A you only need two (touch down/mid point) providing you do not exceed 60 KTS in the stop end section? My part a is not very clear, it indicates that the above is correct until I look at the effects of down graded equipment.
Down graded equipment: Midpoint or stop end RVR. Cat 3A approach= no effect.
I thought you needed the mid point RVR?
Any comments would be appreciated.
Am I correct in thinking that you need all three segment RVRs for a LVP take off, and a CAT 3A you only need two (touch down/mid point) providing you do not exceed 60 KTS in the stop end section? My part a is not very clear, it indicates that the above is correct until I look at the effects of down graded equipment.
Down graded equipment: Midpoint or stop end RVR. Cat 3A approach= no effect.
I thought you needed the mid point RVR?
Any comments would be appreciated.
Join Date: Jul 2001
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DH, since when is an RTO "required"?
Therefore all reporting points are valid and required according to my Part A (runway length requirements pending/check with your Part A for specific approval).
Secondly, as it is CAT 3A, one needs 200m,125m,125m (subject to runway length requirements otherwise 0m at the end if braking is sufficient not to require the end segment).
You must check in your Part A for your operator approved limitations just to cover yourself. it's easy to find in your LVP section.
Therefore all reporting points are valid and required according to my Part A (runway length requirements pending/check with your Part A for specific approval).
Secondly, as it is CAT 3A, one needs 200m,125m,125m (subject to runway length requirements otherwise 0m at the end if braking is sufficient not to require the end segment).
You must check in your Part A for your operator approved limitations just to cover yourself. it's easy to find in your LVP section.
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davinchi
TO - All correct
CAT III - Two different scenario :
CAT III - Two different scenario :
- RVR reports work on all the three points. - You need the relevent point(s) and in this case, according to EU-OPS, relevant means until acft runs faster than 60 Kts. Or more limiting according your company OM.
- RVR sys is downgraded. It means that one or more reporting point does not work. In this case you can apply downgraded considerations according your company OM. EU-OPS states what you wrote.
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If multiple RVRs are reported, then they must all be acceptable, as defined by your Part A.
If elements of the multiple RVR system are not available (downgraded equipment) all reported elements must be acceptable (as per downgraded equipment lists); if only single-point/manual RVR is reported, then it must be not lower than your touchdown requirement.
If elements of the multiple RVR system are not available (downgraded equipment) all reported elements must be acceptable (as per downgraded equipment lists); if only single-point/manual RVR is reported, then it must be not lower than your touchdown requirement.
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Mid-point missing or unserviceable for T/O
For a LVP take-off, what would the minima be if the mid-point was unserviceable or when just two RVRs are given; threshold and stop-end.
In JAR-OPS-1 they write about "multiple" RVRs being required for a take-off in less than 200metres. What is "multiple"; more than one or three?
The above assumes edge lighting and 15m centre lighting.
Does runway guidance (as in Airbus) alter minima?
In JAR-OPS-1 they write about "multiple" RVRs being required for a take-off in less than 200metres. What is "multiple"; more than one or three?
The above assumes edge lighting and 15m centre lighting.
Does runway guidance (as in Airbus) alter minima?