LVTO 125m

[Hundredbelow]

Hi ,

I have gone through several threads but I cannot find a final answer to my question : Under EASA Air Ops rule (not according to your OM-A) , when RVR is not reported, is RVR pilot assessment allowed for the initial part of the take off run for LVTO with 125m ?

There is a little star (*) on table 1A stating that RVR assessment is allowed for the initial part of the take off run ,but it does not specify to which condition it is applicable .

Thanks for your input

[Mustapha Cuppa]

See Table 1.A of AMC1.SPA.LVO.100.

[Citation2]

This is the table I posted in the attached original post. My question is regarding this table on how to interpret it ? if RVR assessment is allowed for TDZ when RVR not reported in LVTO 125 m?

In one hand : multiple rvr required
In the other hand : rvr assessment alowed

[deltahotel]

I think that a visual assessment down to 150m is allowed. If you want to use the 125 absolute minimum, you need RVR. In all cases you also need that 90m visual segment.

[Hundredbelow]

How do you understand the little star in the table? The provision of pilot assessment?

[FlyingStone]

1. Obviously, you can only make RVR assesment before takeoff from the beginning of the runway, so only TDZ. If the table requires RVR measurement for midpoint/rollout (as relevent) as well, you need RVR data. So, no takeoff without RVR measurement below 200m.

2. The 90m visual segment (usually 6 centerline lights) is only required when RVR is 125m. So even if you have RVR 150m, and see only 4 lights, you can depart.

[Hundredbelow]

But have you seen the little stars inside this table and to what they refer to?
These little stars are present for LVTO 150 m and LVTO with 125 m
They are not present for LVTO with 75 m

Have you seen the table ? Where do you place in this table the little star refering to " the initial part of the take off run can be replaced by pilot assessment "

[ajd1]

True for Cat C where 150m can be reduced to 125m, with conditions.
For Cat D it's 200m down to 150m with same conditions.
787 with HUDs can do 75m with approvals.

[Hundredbelow]

Do you mean by "true" that assessment is allowed for TDZ for 125?

[Citation2]

Have you noticed between the difference between the old EU OPS regulation and new EASA Air OPS?

On former EU-OPS , the LVTO table mentioned :multiple RVRs information required
On EASA Air Ops , multiple RVR information is no longer in the table but there is a requirement of having achieved the required VALUE for the relevant points.

EASA table 1A for 125 m: " The required RVR VALUE to be achieved for all relevant RVRs "
"The reported RVR value representative of the initial part of the take-off run can be replaced by pilot assessment."

Notice the difference of multiple RVR information on previous EU ops , and just " Value" achieved on EASA with the condition that only TDZ can be assessed.

[ajd1]

I was referring to Flyingstone's post.

[Hundredbelow]

Still my question is not clarified . Ok let's take an example , I am an EAsA operator operating under Air OPS, I fly a boeing 737 ( CAT C ) . We are LVO approved for 125 m.
During the day of operation TDZ RVR is inop and ATC is reporting xxx/125/125

Am I allowed to assess TDZ RVR ?

[ajd1]

Ok, I've just re-read AMC1 SPA.LVO.100 Low visibility operations. Seems that Citation2 is correct.
So, Hundredbelow, I think Yes you can self assess.
However, the wording is very poor.
For example, the words "The REPORTED rvr value representative of the initial part of the take-off run can be replaced by pilot assessment."
English is my native language and I'm not 100% sure what it really means, especially if we take the word "reported" at face value.