A B737-300 first officer, PF, during departure from phl, reported that the landing gear would not retract. He observed that his shoulder harness mechanism is co-located with the landing gear circuit breaker which may have caused the circuit breaker to pop. The circuit breaker was successfully reset and the flight continued.

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Attributes
ACN	611862
Time
Date	200403
Day	Sat
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : phl.airport
State Reference	PA
Altitude	agl single value : 150
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Controlling Facilities	tower : phl.tower tower : dtw.tower
Operator	common carrier : air carrier
Make Model Name	B737-300
Operating Under FAR Part	Part 121
Navigation In Use	other
Flight Phase	climbout : takeoff climbout : initial
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp pilot : flight engineer
Experience	flight time last 90 days : 184 flight time total : 12610 flight time type : 3200
ASRS Report	611862
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Events
Anomaly	aircraft equipment problem : critical non adherence : published procedure
Independent Detector	other flight crewa other flight crewb
Resolutory Action	flight crew : overcame equipment problem
Consequence	other
Supplementary
Problem Areas	Flight Crew Human Performance Aircraft
Primary Problem	Aircraft

Narrative:

I was the PNF. On takeoff, after positive rate of climb, tried to retract landing gear. The gear would not retract and remained in the down position with the gear handle between the up and down position. Captain asked if any circuit breakers were popped. I looked behind my seat and found a circuit breaker for the landing gear had popped. He told me to reset the circuit breaker and the problem was solved. Retracted gear, contacted dispatcher and was told to continue to destination, orf. We then got out the emergency checklists to go over the problem after it was solved. In the 'heat of the battle,' we were very busy, high workload, using procedures to troubleshoot before checklist called for. Normal gear operation, upon landing. We had maintenance check system to be sure. Possible cause: first officer's shoulder harness may have hung up on the circuit breaker. A guard should be placed over circuit breakers where shoulder harness retracts.

Original NASA ASRS Text

Title: A B737-300 FO, PF, DURING DEP FROM PHL, RPTED THAT THE LNDG GEAR WOULD NOT RETRACT. HE OBSERVED THAT HIS SHOULDER HARNESS MECHANISM IS CO-LOCATED WITH THE LNDG GEAR CIRCUIT BREAKER WHICH MAY HAVE CAUSED THE CIRCUIT BREAKER TO POP. THE CIRCUIT BREAKER WAS SUCCESSFULLY RESET AND THE FLT CONTINUED.

Narrative: I WAS THE PNF. ON TKOF, AFTER POSITIVE RATE OF CLB, TRIED TO RETRACT LNDG GEAR. THE GEAR WOULD NOT RETRACT AND REMAINED IN THE DOWN POS WITH THE GEAR HANDLE BTWN THE UP AND DOWN POS. CAPT ASKED IF ANY CIRCUIT BREAKERS WERE POPPED. I LOOKED BEHIND MY SEAT AND FOUND A CIRCUIT BREAKER FOR THE LNDG GEAR HAD POPPED. HE TOLD ME TO RESET THE CIRCUIT BREAKER AND THE PROB WAS SOLVED. RETRACTED GEAR, CONTACTED DISPATCHER AND WAS TOLD TO CONTINUE TO DEST, ORF. WE THEN GOT OUT THE EMER CHKLISTS TO GO OVER THE PROB AFTER IT WAS SOLVED. IN THE 'HEAT OF THE BATTLE,' WE WERE VERY BUSY, HIGH WORKLOAD, USING PROCS TO TROUBLESHOOT BEFORE CHKLIST CALLED FOR. NORMAL GEAR OP, UPON LNDG. WE HAD MAINT CHK SYS TO BE SURE. POSSIBLE CAUSE: FO'S SHOULDER HARNESS MAY HAVE HUNG UP ON THE CIRCUIT BREAKER. A GUARD SHOULD BE PLACED OVER CIRCUIT BREAKERS WHERE SHOULDER HARNESS RETRACTS.

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.