If , the this incident was as bad a reported, how come the airframe left DPS as scheduled on the return flight not long afterwards...
A more thorough beneath the skin inspection would surely be appropriate. As it would ahve been for a certain VC10 (G-ASIX)that fell sideways from the sky over the Andes 40 years ago, got a late night check on landing locally and then flew a revenue service home to LGW- only then was it found that a main tail fin spar had gone and much work was required.
CAL really ought to have inspected this aircraft to a deeper level before singing it off for flight- IF the incident was from FL35-250 - that is a 10K height excursion.