m124: beat two is notated on a different toms pitch. Since the score indicates the player is to only have one drum, I assume this is a simple typo.
m195: there is a stray percussion clef marking.
m19: there is no key signature notated in the part.
m36: there is no key signature notated in the part.
m39 (D): there is no key signature in the score.
Presumably this should be three flats everywhere, accounting for the unpitched cymbal parts.
m24: throughout the piece some tuning changes are notated and some are not, which is confusing. Unless I am reading something wrong, or the part is intended for more than 4 timpani, somewhere between m24 and m39 the player needs to retune the 23" drum from G-sharp to E-flat, and retune the 32" drum from D to F.
m56: Tuning changes are not clear. "ped." from E-flat to F is noted, but this leaves the next E-flat unaccounted for. Either an additional "ped." should indicate the need to pedal back to E-flat, and then note that this drum needs to get back to F for m69, or there needs to be an indication to pedal the 26"; drum up to E-flat and then back to D in m57, then get it back to an E-flat for m71. The former option seems easier.
m60: the tuning change for the 32" drum is notated. However, it is also necessary here to retune the 29"; drum to A and retune the 26"; drum to D-flat.
m74: after the m60 note to tune to F-sharp, this pitched is notated enharmonically as G-flat.
m77 (J): retune instructions are for E G C E, but this does not account for the D in m102.
m133: the timpani solo starting in this measure doesn't seem feasible without either a fifth drum tuned to high G, or without "sliding" all of needed pitches down one drum (i.e. previous tuning is E-flat G D-flat E; this could in theory be shifted to G D-flat E G, which fits on four drums but would be a pain to achieve while playing the music). It seems this latter strategy may be the intent given the tuning instruction in m144 and the fact that a 29"; drum cannot typically achieve a low E.
m150: tuning instruction should refer to D-flat, not C-sharp, since D-flats are notated.
m167: low E needs to be retuned to A-flat.
m174: A-flat needs to be retuned to low F to be ready for m176. D needs to be retuned to C to be ready for m187.
m182: the low E needs to be retuned to E-flat
m201: somewhere prior to this bar the B-flat needs to become a B.