What was found
CAPTAINS ALTIMETER WAS REPORTED TO BE 100 TO 200 FEET OFF AT ALL ALTITUDES. REMOVED AND REPLACED ALTIMETER. SYSTEM TESTS SATISFACTORY. SUBSEQUENT BENCH TESTS FOUND THAT THE ALTIMETER WAS INDICATING 100 FEET HIGH AND THAT THE MILIBAR INDICATION DID NOT COINCIDE WITH THE INCHES OF MERCURY DICATION. THIS WAS A SECOND SUCH FAILURE OF THIS INSTRUMENT IN THE PAST 6 MONTHS OF OPERATION. (M)