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A descending B747-400 crew fails to make an assigned crossing altitude when the captain still has his altimeter set on qne vice local qnh.
| Attributes | |
| ACN | 422619 |
| Time | |
| Date | 199812 |
| Day | Wed |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | atc facility : fim |
| State Reference | CA |
| Altitude | msl bound lower : 12000 msl bound upper : 12600 |
| Environment | |
| Flight Conditions | VMC |
| Light | Night |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Navigation In Use | Other |
| Flight Phase | descent other |
| Route In Use | arrival other arrival star : star enroute airway : zla |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : instrument pilot : commercial |
| Experience | flight time last 90 days : 95 flight time total : 7500 flight time type : 600 |
| ASRS Report | 422619 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Events | |
| Anomaly | altitude deviation : undershoot altitude deviation : crossing restriction not met non adherence : published procedure non adherence other other anomaly other |
| Independent Detector | other flight crewa |
| Resolutory Action | none taken : insufficient time |
| Consequence | Other |
| Supplementary | |
| Air Traffic Incident | Pilot Deviation |
Narrative:
At cruise the captain and I discussed the SOP's for altimeter settings since this airplane can display 2 altimeter numbers at once, but SOP is to only display the altimeter in use for the phase of flight. At transition I stated 'transition 30.31 inches set' and he stated 'transition 30.31 inches set.' we were assigned to cross symon on the arrival at 12000 ft. Approaching symon, I saw that we were 300 ft high. As I investigated, I saw that the captain still had 29.92 set for the altimeter. He reset 30.31 but we were still high crossing symon. I hadn't flown in the airplane for about 6 weeks and he was new so both of us were rusty. We were rushed because lax changed the approach we expected and I was busy reloading it into the FMC and did the approach descent late which would have caught our altimeter setting. More vigilance, especially with high altimeter settings, would have helped.
Original NASA ASRS Text
Title: A DSNDING B747-400 CREW FAILS TO MAKE AN ASSIGNED XING ALT WHEN THE CAPT STILL HAS HIS ALTIMETER SET ON QNE VICE LCL QNH.
Narrative: AT CRUISE THE CAPT AND I DISCUSSED THE SOP'S FOR ALTIMETER SETTINGS SINCE THIS AIRPLANE CAN DISPLAY 2 ALTIMETER NUMBERS AT ONCE, BUT SOP IS TO ONLY DISPLAY THE ALTIMETER IN USE FOR THE PHASE OF FLT. AT TRANSITION I STATED 'TRANSITION 30.31 INCHES SET' AND HE STATED 'TRANSITION 30.31 INCHES SET.' WE WERE ASSIGNED TO CROSS SYMON ON THE ARR AT 12000 FT. APCHING SYMON, I SAW THAT WE WERE 300 FT HIGH. AS I INVESTIGATED, I SAW THAT THE CAPT STILL HAD 29.92 SET FOR THE ALTIMETER. HE RESET 30.31 BUT WE WERE STILL HIGH XING SYMON. I HADN'T FLOWN IN THE AIRPLANE FOR ABOUT 6 WKS AND HE WAS NEW SO BOTH OF US WERE RUSTY. WE WERE RUSHED BECAUSE LAX CHANGED THE APCH WE EXPECTED AND I WAS BUSY RELOADING IT INTO THE FMC AND DID THE APCH DSCNT LATE WHICH WOULD HAVE CAUGHT OUR ALTIMETER SETTING. MORE VIGILANCE, ESPECIALLY WITH HIGH ALTIMETER SETTINGS, WOULD HAVE HELPED.
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.