Flight crew finds bypass fuel filter button on a beech 02. After being told it was ok to fly the aircraft, the flight crew later finds out the fuel filter must be checked before flight anytime button is extended.

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Attributes
ACN	357459
Time
Date	199701
Day	Wed
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : zzz
State Reference	US
Altitude	agl bound lower : 0 agl bound upper : 0
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	Beech 1900
Operating Under FAR Part	Part 135
Flight Phase	ground : preflight
Flight Plan	None
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp pilot : cfi
Experience	flight time last 90 days : 230 flight time total : 5000 flight time type : 1400
ASRS Report	357459
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp pilot : cfi pilot : instrument
Experience	flight time last 90 days : 218 flight time total : 7200 flight time type : 3327
ASRS Report	357458
Events
Anomaly	aircraft equipment problem : less severe non adherence : far non adherence other other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified other flight crewa
Resolutory Action	other
Consequence	Other
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	other

Narrative:

On jan/xx/97, departed for a flight in a beech 1900. On preflight, noticed the pre-bypass fuel filter button was out. Notified maintenance via phone, and was informed that the pre-bypass button was out from a prior landing, and no further action was needed. Upon further investigation by maintenance, the crew was informed that, according to the beech maintenance manual, regardless of the situation, the fuel filter should have been checked for a possible fuel filter bypass.

Original NASA ASRS Text

Title: FLC FINDS BYPASS FUEL FILTER BUTTON ON A BEECH 02. AFTER BEING TOLD IT WAS OK TO FLY THE ACFT, THE FLC LATER FINDS OUT THE FUEL FILTER MUST BE CHKED BEFORE FLT ANYTIME BUTTON IS EXTENDED.

Narrative: ON JAN/XX/97, DEPARTED FOR A FLT IN A BEECH 1900. ON PREFLT, NOTICED THE PRE-BYPASS FUEL FILTER BUTTON WAS OUT. NOTIFIED MAINT VIA PHONE, AND WAS INFORMED THAT THE PRE-BYPASS BUTTON WAS OUT FROM A PRIOR LNDG, AND NO FURTHER ACTION WAS NEEDED. UPON FURTHER INVESTIGATION BY MAINT, THE CREW WAS INFORMED THAT, ACCORDING TO THE BEECH MAINT MANUAL, REGARDLESS OF THE SIT, THE FUEL FILTER SHOULD HAVE BEEN CHKED FOR A POSSIBLE FUEL FILTER BYPASS.

Data retrieved from NASA's ASRS site as of July 2007 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.