As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 3640 - AFTER GEAR RETRACTION NOSE DOORS INDICATED OPEN. AFTER GEAR WAS CYCLED NOSE GEAR DID NOT SHOW DOWN AND LOCKED. CREW PERFORMED ALTERNATE EXTENSION AND RETURNED TO PHL WITHOUT INCIDENT. REMOVED AND REPLACED NOSE DRAG STRUT PROXIMITY SWITCH. RETRACTION AND OPERATIONAL TESTS NORMAL. AIRCRAFT RETURNED TO SERVICE. (M)