This quote is also from my addendum (supplement) to my first report.
Update: I got the opportunity to work the 737NG EBU line yesterday (2/25/02) and I gathered some info while I was there. It turns out that inspectors are not the only ones that use "calibrated eyeballs" to inspect the fit and fairs on I&R installations, but shop does also (I guess this fits in with item 14 above)!
Proof is documented right on the planning for (job I.D. number and line number), the exhaust plug and sleeve installation job. In operation 110, last paragraph, the shop "visually checks" and buys off the fit and fair for the plug, and in operation 140, they do the same for the exhaust sleeve.
The installation for this particular line number was the (I.D. number) installation. On the related aerosmoothness drawing, (I.D. number) sheet 1, the exhaust plug and sleeve area of the EBU is defined as an "extra critical" aerosmoothness area in zone C7.
Per General Note GN02 in zone C5 of the drawing, states that compliance with the aerosmoothness drawing requirements must be verified using tools or procedures with accuracy and repeatability of equal to or better than (dimension), and where the hardware configuration prevents the application of accurate measurement devices, use the best means available.
Linear scales are not acceptable (then it goes on to say which tools are acceptable. No, "eyes calibrated to (the drawing tolerance) are not listed). General Note GN06 in zone C5 of the drawing, states that the measurement points used for final fit verification on any interface should be coordinated where practical with HVC points identified on A.I.P. drawing (I.D. number) sheet 6.
Also, on sheet 2 of aerosmoothness drawing (I.D. number), view 3A7 in zone A12, which calls out fair requirements for the plug, and view 6B7 in zone B11 (I believe), which calls out fair requirements for the sleeve, call out flag note 5, which states, if measurements are taken, that they must comply with requirements.
I suppose this also applies to measurements taken by eyeball. Also, on (job I.D. number and line number) (737NG inlet installation job), shop checks the gap and fair on the inlet installation, without any QA buyoff, in operation 120.
The Last Inspector