In a case of being asked to sign off on another appraiser's work, I TELL the client, "what repairs/items am I verifying and what photos do you want." I tell them DO NOT send me the OA, just tell me what you want verified. That goes into my very specific SOW.
One problem I see with your approach, even though your intentions were good, is what happens if there is serious item the OA failed to note? Because if I'm the client and you pointed out one thing, why didn't you point out the other one that was missed in the OA?
Terrell makes a good point regarding SOW specific to FHA on certifying repairs. I don't think I ever been asked to do one for an FHA appraisal, they were all Conv loans. Even so, I'd still do an FHA as describe above.