B737 flight crew reported fuel odor in cabin and resulting passenger illness.

Attributes
ACN	1631345
Time
Date	201903
Local Time Of Day	0601-1200
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Flight Conditions	VMC
Aircraft 1
Make Model Name	B737 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	Climb
Flight Plan	IFR
Component
Aircraft Component	Fuel Tank
Person 1
Function	Pilot Flying Captain
Qualification	Flight Crew Multiengine Flight Crew Instrument Flight Crew Air Transport Pilot (ATP)
Experience	Flight Crew Last 90 Days 219 Flight Crew Total 16068
Person 2
Function	First Officer Pilot Not Flying
Qualification	Flight Crew Air Transport Pilot (ATP) Flight Crew Multiengine Flight Crew Instrument
Experience	Flight Crew Last 90 Days 150 Flight Crew Total 7654 Flight Crew Type 5485
Events
Anomaly	Aircraft Equipment Problem Less Severe Flight Deck / Cabin / Aircraft Event Smoke / Fire / Fumes / Odor Flight Deck / Cabin / Aircraft Event Illness

Narrative:

During climbout of ZZZ; flight attendant (flight attendant) called and said there was a fuel odor in the cabin. Shortly after that the fas called and said a passenger had gotten sick. At that point we [notified ATC]; informed ATC that we wanted to divert to ZZZ1. We called ZZZ1 station operations and informed them that we were diverting to ZZZ1. On approach the fas informed us that the smell had diminished. Approach and landing (overweight) was uneventful. Emergency equipment met the aircraft as we taxied clear of [runway]. The emergency crew captain wanted to deplane while the aircraft was still on the taxiway. We asked them to walk around the plane and if they saw any leak we would deplane on the taxiway. They saw no leaks so we taxied to gate and waited for marshallers to arrive to marshal us to the gate. After parking at the gate; maintenance informed us that there was a fuel leak from the center fuel tank.

Original NASA ASRS Text

Title: B737 flight crew reported fuel odor in cabin and resulting passenger illness.

Narrative: During climbout of ZZZ; Flight Attendant (FA) called and said there was a fuel odor in the cabin. Shortly after that the FAs called and said a passenger had gotten sick. At that point we [notified ATC]; informed ATC that we wanted to divert to ZZZ1. We called ZZZ1 station OPS and informed them that we were diverting to ZZZ1. On approach the FAs informed us that the smell had diminished. Approach and landing (overweight) was uneventful. Emergency equipment met the aircraft as we taxied clear of [runway]. The Emergency Crew Captain wanted to deplane while the aircraft was still on the taxiway. We asked them to walk around the plane and if they saw any leak we would deplane on the taxiway. They saw no leaks so we taxied to gate and waited for marshallers to arrive to marshal us to the gate. After parking at the gate; Maintenance informed us that there was a fuel leak from the center fuel tank.

Data retrieved from NASA's ASRS site 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.