Originally Posted by
EEngr
........ Back in my days at Boeing (long before plugs began popping out), engineering was responsible for defining functional tests and procedures for doing any sort of out of sequence work. LRUs (Line Replaceable Units) often had pre-written procedures for removal and replacement. These served as checklists to ensure the part was removed (properly, without damaging surrounding structure) and reinstalled without missing a step or part. For infrequently performed work, one-time work orders were generated. Which also served as the checklist. And a record of work performed. Which it seems is missing for this incident. ..........
Exactly - and it has been suggested in this Thread that the "door opening" definition was used to obviate the need for paperwork. My Para 2 at Post #1910 fully supports your comment above!
