Narrative:

On initial climb out at approximately 1500 ft the master caution illuminated indicating an aft cargo warning. It was my leg, so captain/check airman referenced the QRH. Since the aircraft would not pressurize, we elected to return to sjc. After touchdown the light went out as we taxied back to the gate. Captain advised me that the ramp agents had not secured the cargo bin netting and it had gotten caught in the door when closed. He contacted dispatch and maintenance to discuss the situation. Afterwards, we received a new release, refueled and continued the flight. I feel this situation could have been avoided if the cargo bin net was properly secured and not allowed to slip down into the door seal area. It might also be beneficial that anyone who closes the cargo doors be reminded of the importance of making sure the door is closed properly (with no obstructions). Supplemental information from acn 627907: coordinated with dispatch, maintenance, got fuel, new dispatch release, closed door and checked pressurization, left 50 mins late. Did not make any 'information write-up' in logbook as could not find any fom requirement to do so. In hindsight, would make note explaining air return in logbook for FAA.

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Original NASA ASRS Text

Title: A B737 FLT CREW RECEIVE A DOOR LIGHT JUST AFTER TKOF RESULTING IN A RETURN TO DEP ARPT.

Narrative: ON INITIAL CLBOUT AT APPROX 1500 FT THE MASTER CAUTION ILLUMINATED INDICATING AN AFT CARGO WARNING. IT WAS MY LEG, SO CAPT/CHK AIRMAN REFED THE QRH. SINCE THE ACFT WOULD NOT PRESSURIZE, WE ELECTED TO RETURN TO SJC. AFTER TOUCHDOWN THE LIGHT WENT OUT AS WE TAXIED BACK TO THE GATE. CAPT ADVISED ME THAT THE RAMP AGENTS HAD NOT SECURED THE CARGO BIN NETTING AND IT HAD GOTTEN CAUGHT IN THE DOOR WHEN CLOSED. HE CONTACTED DISPATCH AND MAINT TO DISCUSS THE SIT. AFTERWARDS, WE RECEIVED A NEW RELEASE, REFUELED AND CONTINUED THE FLT. I FEEL THIS SIT COULD HAVE BEEN AVOIDED IF THE CARGO BIN NET WAS PROPERLY SECURED AND NOT ALLOWED TO SLIP DOWN INTO THE DOOR SEAL AREA. IT MIGHT ALSO BE BENEFICIAL THAT ANYONE WHO CLOSES THE CARGO DOORS BE REMINDED OF THE IMPORTANCE OF MAKING SURE THE DOOR IS CLOSED PROPERLY (WITH NO OBSTRUCTIONS). SUPPLEMENTAL INFO FROM ACN 627907: COORDINATED WITH DISPATCH, MAINT, GOT FUEL, NEW DISPATCH RELEASE, CLOSED DOOR AND CHKED PRESSURIZATION, LEFT 50 MINS LATE. DID NOT MAKE ANY 'INFO WRITE-UP' IN LOGBOOK AS COULD NOT FIND ANY FOM REQUIREMENT TO DO SO. IN HINDSIGHT, WOULD MAKE NOTE EXPLAINING AIR RETURN IN LOGBOOK FOR FAA.

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.