What was found
WHILE CLEANING LENS, IT APPEARED TO BE LOOSE IN THE HOUSING. A VERY GENTLE PULL RELEASED THE LENS FROM ITS HOUSING. THE LENS IS THICK GLASS THAT COULD BE A RUNWAY HAZARD IF IT FELL FROM THE AC AND BROKE. PROBABLE CAUSE IS SKYDROL WHICH LEAKED FROM RUDDER PCU AND COMPROMISED THE ADHESIVE FEATURES OF THE SEALANT ATTACHING THE LENS TO THE HOUSING ASSEMBLY. RECOMMEND INSPECTION OF AC THAT HAVE HAD RUDDER PCU SKYDROL LEAKAGE PROBLEMS. SOME TYPE OF MECHANICAL ATTACHMENT OF LENS TO THE HOUSING SHOULD BE CONSIDERED. (K)