As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ADF AUDIO AT ALL CREW STAT'N IS WEAK, INOP, INTERMIT, ETC WITH ANT MODE SET ON ADF CNTRL PNL. RDMI BEARING POINTER OPERATION OK. CREW COMMENTS: RIGHT ADF DOES NOT PICKUP AURAL NDB SIGNAL. NO AURAL OR SENSE ON NDB FREQS. L ADF OK-NEED MORE TIME. INSTALLED NEW ADF R(M216) PASSED GROUND TESTS PER AMM. ADF CHANGED FOR T.S.