ULTRA decrypt CX/MSS/R488(C),36 includes this:
Stamped 0500/10/3 to Obltn. WALTER from Prüfmeister (C% WASSERSCHLAEVER):-
1) Where are the wings and 2 jet units £ TL £ for AM works No. 110538?
So 9K+AM was in need of some major replacement parts on 10 March.