White blocks at Flap positions on indicator
Ground instructor
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White blocks at Flap positions on indicator
Hi all from sunny (sporadic) Banbury in UK. I have an on going question which the internet (and I've printed it all off, it's just not there) refuses to answer. As an aircraft ground engineer, it feels like a design/engineering thing. Why are there white blocks at the flap positions on the indicators? I feel like it's either for ease of pos identification or to allow for onload/offload flap positions?
Please put me out of my misery, I'm 64 and should be resting really
757-300 flap indicator
Please put me out of my misery, I'm 64 and should be resting really
757-300 flap indicator
Pre-digital? When flaps could be approximately the same, left & right, without undue worrying…
or, to account for (poor) pilot eyesight?
The gauges look familiar, and I think it’s for the situation when dealing with Flap drive failure checklist? “Flaps between 5 & 15?” etc. Anything in the white block counts as meeting the requirement.
or, to account for (poor) pilot eyesight?
The gauges look familiar, and I think it’s for the situation when dealing with Flap drive failure checklist? “Flaps between 5 & 15?” etc. Anything in the white block counts as meeting the requirement.
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There is a speed limit opposite of each white block. Maybe it's done just to facilitate "flap position - speed limit" identification.
Last edited by Acie; 17th Jan 2022 at 06:23.
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It's to make it easier for partially sighted pilots.
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Is it rigging tolerance between both sides, see the film on here about the flaps on YouTube.
Flight Controls
Flight Controls
The blocks were there in the 737-100/200 family, before limit speeds were indicated on the panel next to the indicator:
(from: Flight Controls)
Because of that, I tend to agree with the suggestion of rigging tolerances.
(from: Flight Controls)
Because of that, I tend to agree with the suggestion of rigging tolerances.
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Yes 1.16 on the film shows them split
