Narrative:

After takeoff from ZZZ at about 5000 ft; a strong burning odor; electrical in nature; was noticed on the flight deck. No smoke was present. Oxygen masks were donned and aircraft returned to ZZZ. Upon landing and return to gateway; ZZZ airport fire supervisor noticed burning smell also when smoke curtain pulled back (in main cargo area). Emergency was declared. Callback conversation with reporter revealed the following information: the reporter stated that the fluorescent light bulbs in that DC8 cockpit had just been changed and maintenance theorized that the light ballast may have overheated. The intense electrical smell lasted for about 30 seconds before stabilizing. There was never any smoke. The reporter also stated that rain had been intense that day and when the crew got to the aircraft there was standing water in the flight station that had leaked in around the windows. The reporter feels some water could have gotten back in the electrical circuits although there was no indication of any electrical systems problems.

Google
 

Original NASA ASRS Text

Title: A DC8 CREW SMELLED AN ELECTRICAL SMELL IMMEDIATELY AFTER TKOF. AN EMER WAS DECLARED WITH A RETURN TO LAND.

Narrative: AFTER TKOF FROM ZZZ AT ABOUT 5000 FT; A STRONG BURNING ODOR; ELECTRICAL IN NATURE; WAS NOTICED ON THE FLT DECK. NO SMOKE WAS PRESENT. OXYGEN MASKS WERE DONNED AND ACFT RETURNED TO ZZZ. UPON LNDG AND RETURN TO GATEWAY; ZZZ ARPT FIRE SUPVR NOTICED BURNING SMELL ALSO WHEN SMOKE CURTAIN PULLED BACK (IN MAIN CARGO AREA). EMER WAS DECLARED. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: THE REPORTER STATED THAT THE FLUORESCENT LIGHT BULBS IN THAT DC8 COCKPIT HAD JUST BEEN CHANGED AND MAINTENANCE THEORIZED THAT THE LIGHT BALLAST MAY HAVE OVERHEATED. THE INTENSE ELECTRICAL SMELL LASTED FOR ABOUT 30 SECONDS BEFORE STABILIZING. THERE WAS NEVER ANY SMOKE. THE REPORTER ALSO STATED THAT RAIN HAD BEEN INTENSE THAT DAY AND WHEN THE CREW GOT TO THE AIRCRAFT THERE WAS STANDING WATER IN THE FLT STATION THAT HAD LEAKED IN AROUND THE WINDOWS. THE REPORTER FEELS SOME WATER COULD HAVE GOTTEN BACK IN THE ELECTRICAL CIRCUITS ALTHOUGH THERE WAS NO INDICATION OF ANY ELECTRICAL SYSTEMS PROBLEMS.

Data retrieved from NASA's ASRS site as of May 2009 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.