What was found
DURING REMOVAL OF THE APU INLET, FOUND BOTH THE UPPER & LOWER ANGLES WHERE THE SKIN ATTACHES TO BE CORRODED. R & R UPPER & LOWER ANGLES IAW SRM 51-40-02 PAR 7. CORRODED, PN 148T3120-68 & 148T3120-69, PART NAME SUPPORT ANGLE, SN NSN, BS LOCATION 1725.5 TO 1750, STRINGER & WS LOCATION 5R TO 7R. ACFT WAS GNDED.