FLC OF B190 DISCOVERED ACFT DID NOT PRESSURIZE WHEN LEVEL AT 17000 FT. DSNDED TO 10000 FT; PERFORMED CHKS AND DISCOVERED MAINT HAD LEFT SEVERAL SWITCHES IN INAPPROPRIATE POS; INCLUDING THE PRESSURIZATION SWITCH IN THE 'DUMP' POS.

Date: 2003-03 · Aircraft: Beech 1900

Anomalies: aircraft-equipment-problem-critical|deviation-discrepancy-procedural-far|deviation-discrepancy-procedural-maintenance|deviation-discrepancy-procedural-published-material-policy|other-acft-not-pressurized

Synopsis

FLC OF B190 DISCOVERED ACFT DID NOT PRESSURIZE WHEN LEVEL AT 17000 FT. DSNDED TO 10000 FT; PERFORMED CHKS AND DISCOVERED MAINT HAD LEFT SEVERAL SWITCHES IN INAPPROPRIATE POS; INCLUDING THE PRESSURIZATION SWITCH IN THE 'DUMP' POS.

Narrative

ON MAR/SUN/03; MY FO AND I ARRIVED AT HUNTINGTON TRI-STATE ARPT FOR OUR FLT CREW TO CLT. WE PERFORMED OUR FIRST FLT CREW OF THE DAY CHKLIST; AND NOTICED THE MAINT CREW RETURNED THE ACFT TO US FROM ITS OVERNIGHT CHKS WITH THE WX RADAR LEFT ON AND THE RUDDER TRIM OUT OF POS. WE DEPARTED HUNTINGTON AND PERFORMED THE AFTER TKOF CHKLIST WITH ALL INDICATIONS NORMAL. WE CLBED TO OUR CRUISE ALT OF 17000 FT; AT WHICH POINT; WE PERFORMED THE CRUISE CHKLIST. MOMENTS LATER; THE FLC NOTICED THE CABIN WAS NOT PRESSURIZED; DESPITE AN ABSENCE OF THE CABIN ALT HIGH INDICATOR. WE PERFORMED THE OXYGEN USE CHKLIST WHILE DSNDING TO AN ASSIGNED ALT OF 10000 FT; AND THE CABIN ALT CHKLIST ONCE LEVEL AT 10000 FT. THE PRESSURIZATION SWITCH WAS DISCOVERED IN THE 'DUMP' POS; AND WAS REPOSITIONED TO 'PRESS.' THE CABIN WAS REPRESSURIZED; AND THE FLT CREW CONTINUED TO CHARLOTTE WITHOUT INCIDENT. UPON REACHING CLT; THE CREW NOTICED THE ALTERNATE STATIC PORT STATIC SWITCH ON THE CAPT'S SIDE HAD BEEN LEFT ON; OUT OF ITS GUARD POS BY MAINT; WHICH I MISSED DURING THE FIRST FLT CREW OF THE DAY CHKLIST. NOTE TO SELF; THAT I NEED TO SLOW DOWN WHILE DOING CHKLISTS TO PREVENT SUCH A THING FROM RECURRING. A SUBSEQUENT TEST FLT CREW; WITHIN HRS; TO 11000 FT WITH MAINT PERSONNEL IN ATTENDANCE; DEMONSTRATED FAILURE OF THE CABIN ATTITUDE HIGH WARNING SYS TO ACTIVATE.

Source: NASA Aviation Safety Reporting System (public domain). Reports are voluntary submissions and are not verified by NASA.