What was found
INVESTIGATED A CREW REPORT OF THE FLAPS INTERMITTENTLY NOT RETRACTING PAST THE 10 DEGREE SETTING. DURING TROUBLESHOOTING FOUND THE P/N 45AS61015-13 RT FLAP FOLLOW-UP SWITCH ASSY. ELECTRICAL READINGS TO BECOME INTERMITTENT WHEN EXPOSED TO LOW TEMPERATURES. REPLACED THE RT FLAP FOLLOW-UP SWITCH ASSY WITH A SUPERSEDING P/N 45AS61015-23 SWITCH ASSY. AND ADJUSTED THE LT FLAP FOLLOW-UP SWITCH AS REQUIRED. FLAP SYS TESTS NORMAL. RECOMMEND MFG ISSUE A MANDATORY OR RECOMMENDED SB TO ESTABLISH A RECOMMENDED COMPLIANCE TIME FOR REPLACING OLDER STYLE FLAP FOLLOW-UP SWITCH ASSY'S WITH NEWER P/N FOLLOW-UP SWITCH ASSY'S.