As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING C-CHECK, LEFT SECONDARY H/E EXHAUST LOUVERS HAVE PLAY. REMOVED LT EXHAUST LOUVERS PER B-727 IAW MM 21-55-0. REPLACED LT SECONDARY H/E EXHAUST LOUVERS IN ACCORDANCE WITH B-727 MM 21-55-0. REINSTALLED LT SECONDARY H/E EXHAUST LOUVERS PANEL IN ACCORDANCE WITH B-727 MM 21-55-0. OPS CHECKED LT SECONDARY HEAT EXCHANGER EXHAUST LOUVERS PER B-727 MM 21-55-0, OPS CHECK OK.