Testing of water leaks should be done on the basis of what a car wash would provide by hand or automated. Pointing a direct jet of water between the hinge of the NGC door and the seal at the top of the door frame, is not a realistic test. The hinge above the door frame would under normal circumstances divert water.
Never the less, what I am hearing form John’s inspection today is glass is varying in curve from 4-9mm in the area in line with the top of the gas strut brackets.
Our glass drawing attached 668PW004 identifies on page 2 what are called CP points. CP4 to CP8 represent exactly where the door sealing line should be and identifies tolerances on the drawing.
Over 5.7mm difference between centre at CP6 to the sides at CP4 and CP8 is excessive and could lead to loss of seal.
A check fixture for the unassembled glass is available at VMC, at ORA and another at ARB Engineering that can check the CP points.
I suggest QA arrange with ORA to do an inspection of 20 pieces of glass to CP points on the drawing using the check fixture. If pieces are out of spec continue inspection.
I suggest we continue in CA production to wet the seal across the top of the door with wax and grease remover- close the door review the imprint made to the glass to ensure the seal touches, in an uninterrupted imprint around the glass. Train operators in assembly to do this for each one built.
If we have issues where this is not conforming, replace glass or replace seal.
Measure glass to determine conformity to drawing, and develop a system to measure door glass in an assembly before they are assembled to canopies.
Have someone inspect stock at CA of both 668AC001 and 668AC002.
With doors now assembled out of ORA I would suggest we need to devise a check jig for the glass that works on a door assembly for Ascent assembly sites.
Door seals tension should be sufficient to hold the thickness of standard pieces of copy paper in 20mm wide x 100mm long strips. The paper should not fall out of the seal when the door is closed. This should provide sufficient seal tension to glass for water sealing.
Testing of water leaks should be done on the basis of what a car wash would provide by hand or automated. Pointing a direct jet of water between the hinge of the NGC door and the seal at the top of the door frame, is not a realistic test. The hinge above the door frame would under normal circumstances divert water. Never the less, what I am hearing form John’s inspection today is glass is varying in curve from 4-9mm in the area in line with the top of the gas strut brackets. Our glass drawing attached 668PW004 identifies on page 2 what are called CP points. CP4 to CP8 represent exactly where the door sealing line should be and identifies tolerances on the drawing. Over 5.7mm difference between centre at CP6 to the sides at CP4 and CP8 is excessive and could lead to loss of seal.A check fixture for the unassembled glass is available at VMC, at ORA and another at ARB Engineering that can check the CP points. I suggest QA arrange with ORA to do an inspection of 20 pieces of glass to CP points on the drawing using the check fixture. If pieces are out of spec continue inspection. I suggest we continue in CA production to wet the seal across the top of the door with wax and grease remover- close the door review the imprint made to the glass to ensure the seal touches, in an uninterrupted imprint around the glass. Train operators in assembly to do this for each one built.If we have issues where this is not conforming, replace glass or replace seal. Measure glass to determine conformity to drawing, and develop a system to measure door glass in an assembly before they are assembled to canopies. Have someone inspect stock at CA of both 668AC001 and 668AC002.With doors now assembled out of ORA I would suggest we need to devise a check jig for the glass that works on a door assembly for Ascent assembly sites. Door seals tension should be sufficient to hold the thickness of standard pieces of copy paper in 20mm wide x 100mm long strips. The paper should not fall out of the seal when the door is closed. This should provide sufficient seal tension to glass for water sealing.
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