As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CAPTAIN HSI DISPLAYED YELLOW FAILED AND NAV FLAGGED FOR NR 1 VOR. RETURNED TO SLC. INSTALLED SERVICEABLE HPU-74 IN NR 1 POSITION. NO FLAGS OR ''''FAIL'''' MESSAGE. CHECKS GOOD IAW 34-22-05. P/N ON: 622-6198-103, S/N: 2241, S/N OFF: 2234.