Guys, come on - the article quoted earlier states that the airline had missed only one step in applying the AD.
You have obviously never been an engineer.
“This [AD] requires a modification of the air data computer (ADC) system, which involves installing certain new circuit breakers, relays, and related components, and making various wiring changes in and between the flight deck and main equipment center …
United had performed the hardware changes within that period, but failed to perform the functionality tests
That is almost equivalent to saying I have designed a new airliner but haven't tested it before it went into service.
This is more than a clerical error, it is disgraceful if you are fully aware of what is involved with AD's and I truly hope United have a very good answer should the above quote be correct. In fact there is now a real risk of pandorra's box being opened.
Just imagine an uncertified passenger jet entering into commercial service without being tested. How many departments have failed in their duty?
It doesn't bear thinking about.