What was found
DURING THE MONTH OF OCTOBER THERE WERE TWO FUEL PRESSURE SWITCH (P/N 101-389018-21) FAILURES. AIRCRAFT N NR 901SK PRESSURE SWITCH S/N NR 2895 FAILED AT 1316.4 HOURS. AIRCRAFT N NR 148SK PRESSURE SWITCH S/N NR 2050 FAILED AT 3320.0 HOURS. THE PRESSURE SWITCHES WERE FROM THE AUX FUEL TRANSFER SYSTEM, PRESSURE SWITCH S/N NR 2895 FAILED TO GIVE AN 'RT NO AUX XFR' ANNUNCIATOR IN THE 'ON' MODE AND PRESSURE SWITCH S/N NR 2050 FAILED TO GIVE AN 'LT NO AUX XFR' ANNUNCIATOR IN THE 'AUTO' MODE. THE MEAN TIME BETWEEN FAILURE WAS 2324.2 HOURS. (X)