MD11 ON DEP LGW IN STORMY WX CONDITIONS DISTR BY STATIC DISCHARGE OR POSSIBLE LIGHTNING STRIKE FAILS TO SET ALTIMETER AT TRANSITION ALT RESULTING IN ALT OVERSHOOT AT ASSIGNED ALT OF FL130.
Synopsis
MD11 ON DEP LGW IN STORMY WX CONDITIONS DISTR BY STATIC DISCHARGE OR POSSIBLE LIGHTNING STRIKE FAILS TO SET ALTIMETER AT TRANSITION ALT RESULTING IN ALT OVERSHOOT AT ASSIGNED ALT OF FL130.
Narrative
BUS RIDE TO ARPT WAS LONGER THAN NORMAL (2 HRS DURATION) DUE TO TFC; STRONG WINDS; RAINY SLEET; AND SNOW. AT ARPT THE PRECIP STOPPED; TEMP ABOVE FREEZING; BUT GUSTY WINDS. JUST PRIOR TO TKOF; BAD TURB AT 200 FT RPTED BY A MISSED APCH ACFT (VISIBILITY GOOD). AFTER TKOF WE BEGAN TO BE RADAR VECTORED; TAKING US OFF OF THE SID. WE ENTERED AN AREA OF MODERATE TO HVY RAIN; TEMP AROUND FREEZING; BUT NO TURB. ALT WAS AROUND 500-800 FT AND SHORTLY THEREAFTER A LARGE RPT WITH A LARGE WHITE FLASH TOOK PLACE ON R SIDE OF ACFT (EITHER STATIC DISCHARGE OR LIGHTNING STRIKE; SUSPECT STATIC DISCHARGE). A STRONG TO MEDIUM BURNT SMELL OCCURRED IN COCKPIT AND CABIN. CONCERNED WITH PAX ANXIETY; THE RELIEF PLT WAS DIRECTED TO MAKE A PA TO EXPLAIN WHAT HAD OCCURRED AND THAT THERE WAS NOTHING TO BE ALARMED ABOUT. WE WERE NOW OUT OF THE RAIN AND CLOUDS; BEING RADAR VECTORED TO THE W AND CLRED OF CLOUDS. THE AFTER TKOF CHK HAD BEEN PERFORMED AFTER GEAR RETRACTION; WITH ONLY ALTIMETER RESET AND LIGHTS TO BE TURNED OFF. PRIOR TO REACHING OUR ASSIGNED FLT LEVEL OF FL130; WE WERE ADVISED BY ATC THAT WE HAD DEPARTED FL130; A QUICK END TO THE CLB AND DSCNT WAS DONE. PROB: ALTIMETER SETTING WAS 974 HECTAPASCALS (28.76 INCHES) AND TRANSITION ALT OF 5000 FT. WITH OUR CONCERN FOR THE WX; STATIC DISCHARGE; AND RADAR VECTORS; THE ALTIMETER HAD NOT BEEN SET TO 1013 HECTAPASCALS (29.92 INCHES) PASSING THE TRANSITION ALT. MORE VIGILANCE TO EUROPEAN TRANSITION ALT (5000 FT VERSUS NORMAL UNITED STATES 18000 FT) IS REQUIRED; ESPECIALLY WHEN CONFRONTED WITH DISTRS COMING FROM UNUSUAL FLT CONDITIONS. WITH THIS LARGE OF A DIFFERENCE FROM NORMAL ALTIMETER SETTINGS; THIS PROB SHOULD BE PROMINENT IN THE PREDEP BRIEFING. ACFT WAS AN FMS INTENSIVE MD11; CREW VERY EXPERIENCED.
Source: NASA Aviation Safety Reporting System (public domain). Reports are voluntary submissions and are not verified by NASA.