<< >> NASA ASRS Report 1050160, November 2012

BE35 pilot reports fuel venting from a fuel tank cap just after takeoff. An emergency is declared and an abbreviated pattern is flown to the departure runway. Ninety percent of the fuel in that tank had vented in the short flight.

Attributes
ACN	1050160
Time
Date	201211
Local Time Of Day	0601-1200
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	Bonanza 35
Operating Under FAR Part	Part 91
Flight Phase	Takeoff
Route In Use	None
Flight Plan	None
Component
Aircraft Component	Fuel Tank Cap
Person 1
Function	Pilot Flying Single Pilot
Qualification	Flight Crew Instrument Flight Crew Flight Engineer Flight Crew Air Transport Pilot (ATP) Flight Crew Multiengine
Experience	Flight Crew Last 90 Days 180 Flight Crew Total 14000 Flight Crew Type 150
Events
Anomaly	Aircraft Equipment Problem Critical Inflight Event / Encounter Fuel Issue

Narrative:

After takeoff avgas was observed venting from fuel tank. Emergency declared and an abbreviated traffic pattern was flown returning to the same runway. Landing was normal and aircraft taxied to fuel and maintenance facility where an adjustment was made to fuel cap locking mechanism by certified mechanic. Ninety percent of tank contents (one fuel tank of four) had vented while airborne. No fuel leak on ground. No damage or traffic conflicts were observed.

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Original NASA ASRS Text

Title: BE35 pilot reports fuel venting from a fuel tank cap just after takeoff. An emergency is declared and an abbreviated pattern is flown to the departure runway. Ninety percent of the fuel in that tank had vented in the short flight.

Narrative: After takeoff avgas was observed venting from fuel tank. Emergency declared and an abbreviated traffic pattern was flown returning to the same runway. Landing was normal and aircraft taxied to fuel and maintenance facility where an adjustment was made to fuel cap locking mechanism by Certified Mechanic. Ninety percent of tank contents (one fuel tank of four) had vented while airborne. No fuel leak on ground. No damage or traffic conflicts were observed.

Data retrieved from NASA's ASRS site as of July 2013 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.