What was found
DURING FIRST HOUR OF FLIGHT WITH FRESHLY OVERHAULED INSTRUMENT, THE 100 FOOT HAND STOPPED WORKING. AFTER REMOVAL OF THE INSTRUMENT, NOTICED SHAFT FOR THE HAND HAD DISENGAGED INTERNALLY. BY TILTING THE ALTIMETER, THE SHAFT COULD BE RE-ENGAGED WITH THE INTERNAL MECHANISM, BUT WHEN TILTED TO SIMULATE A CLIMB ATTITUDE, IT WOULD ONCE AGAIN DISENGAGE AND BECOME INOPERATIVE. OVERHAULED 8/99.