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A flight crew failed to notify dispatch per flight operations manual, concerning electrical fumes that were noticed en route, on a B-747 freighter. The so lights had been changed prior to departure, were suspected, and isolated.
| Attributes | |
| ACN | 296832 |
| Time | |
| Date | 199502 |
| Day | Wed |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : sqa |
| State Reference | AK |
| Altitude | msl bound lower : 25000 msl bound upper : 25000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zan |
| Operator | common carrier : air carrier |
| Make Model Name | B747-C/F |
| Operating Under FAR Part | Part 121 |
| Flight Phase | climbout : intermediate altitude |
| Route In Use | enroute : pacific enroute airway : zan |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp pilot : flight engineer pilot : instrument |
| Experience | flight time last 90 days : 140 flight time total : 17800 flight time type : 3770 |
| ASRS Report | 296832 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| ASRS Report | 297216 |
| Events | |
| Anomaly | aircraft equipment problem : critical non adherence : far non adherence : published procedure |
| Independent Detector | other flight crewa |
| Resolutory Action | flight crew : overcame equipment problem other |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Aircraft |
| Air Traffic Incident | Pilot Deviation other |
Narrative:
Suspected fumes in cockpit (similar to an electrical overheat condition) were noted on climb out. We isolated electrical system as per procedure and shut off all unnecessary cockpit lights. Nothing further was detected. We suspected problem with the lights on forward instrument panel, that were changed in anc prior to takeoff. Also a paper over the storm light indicated a possible cause. I did not report the problem to dispatch, as per flight operations manual, because we felt we had eliminated the problem. On arrival at narita, mechanic found an overheated circuit board that controled so lighting. Supplemental information from acn 297216: inspected main cargo deck. So panel lights dimming function.
Original NASA ASRS Text
Title: A FLC FAILED TO NOTIFY DISPATCH PER FLT OPS MANUAL, CONCERNING ELECTRICAL FUMES THAT WERE NOTICED ENRTE, ON A B-747 FREIGHTER. THE SO LIGHTS HAD BEEN CHANGED PRIOR TO DEP, WERE SUSPECTED, AND ISOLATED.
Narrative: SUSPECTED FUMES IN COCKPIT (SIMILAR TO AN ELECTRICAL OVERHEAT CONDITION) WERE NOTED ON CLBOUT. WE ISOLATED ELECTRICAL SYS AS PER PROC AND SHUT OFF ALL UNNECESSARY COCKPIT LIGHTS. NOTHING FURTHER WAS DETECTED. WE SUSPECTED PROB WITH THE LIGHTS ON FORWARD INST PANEL, THAT WERE CHANGED IN ANC PRIOR TO TKOF. ALSO A PAPER OVER THE STORM LIGHT INDICATED A POSSIBLE CAUSE. I DID NOT RPT THE PROB TO DISPATCH, AS PER FLT OPS MANUAL, BECAUSE WE FELT WE HAD ELIMINATED THE PROB. ON ARR AT NARITA, MECH FOUND AN OVERHEATED CIRCUIT BOARD THAT CTLED SO LIGHTING. SUPPLEMENTAL INFO FROM ACN 297216: INSPECTED MAIN CARGO DECK. SO PANEL LIGHTS DIMMING FUNCTION.
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.