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Medium large transport first officer has difficulty understanding the computer ATIS voice. Uses wrong altimeter setting. Altitude deviation.
| Attributes | |
| ACN | 364400 |
| Time | |
| Date | 199703 |
| Day | Wed |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | atc facility : lax |
| State Reference | CA |
| Altitude | msl bound lower : 10000 msl bound upper : 18000 |
| Environment | |
| Flight Conditions | Mixed |
| Light | Night |
| Aircraft 1 | |
| Controlling Facilities | tracon : lax |
| Operator | common carrier : air carrier |
| Make Model Name | Commercial Fixed Wing |
| Operating Under FAR Part | Part 121 |
| Flight Phase | descent other |
| Route In Use | approach : visual |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 250 flight time total : 5790 flight time type : 2350 |
| ASRS Report | 364400 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 210 flight time total : 12000 flight time type : 7700 |
| ASRS Report | 364531 |
| Events | |
| Anomaly | altitude deviation : overshoot non adherence : far non adherence : clearance other anomaly other |
| Independent Detector | other flight crewa |
| Resolutory Action | none taken : detected after the fact |
| Consequence | Other |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Pilot Deviation other |
Narrative:
Automated ATIS voice -- listened twice -- copied altimeter setting as 30.46. I commented to my captain that altimeter setting seemed unusually high -- then listened to it again -- still thought it was 30.46. Clearance below FL180 was received from lax approach. They never gave us an altimeter setting, probably because we checked in on their frequency with ATIS information. On final about 1000 ft we realized our altimeters were not correct. Our intermittent level off's at 15000 ft, 12000 ft and 10000 ft were probably about 400 ft low. Approach never said anything about our altitude. On the ground, ATIS had changed to a human voice and the altimeter setting was 30.06.
Original NASA ASRS Text
Title: MLG FO HAS DIFFICULTY UNDERSTANDING THE COMPUTER ATIS VOICE. USES WRONG ALTIMETER SETTING. ALTDEV.
Narrative: AUTOMATED ATIS VOICE -- LISTENED TWICE -- COPIED ALTIMETER SETTING AS 30.46. I COMMENTED TO MY CAPT THAT ALTIMETER SETTING SEEMED UNUSUALLY HIGH -- THEN LISTENED TO IT AGAIN -- STILL THOUGHT IT WAS 30.46. CLRNC BELOW FL180 WAS RECEIVED FROM LAX APCH. THEY NEVER GAVE US AN ALTIMETER SETTING, PROBABLY BECAUSE WE CHKED IN ON THEIR FREQ WITH ATIS INFO. ON FINAL ABOUT 1000 FT WE REALIZED OUR ALTIMETERS WERE NOT CORRECT. OUR INTERMITTENT LEVEL OFF'S AT 15000 FT, 12000 FT AND 10000 FT WERE PROBABLY ABOUT 400 FT LOW. APCH NEVER SAID ANYTHING ABOUT OUR ALT. ON THE GND, ATIS HAD CHANGED TO A HUMAN VOICE AND THE ALTIMETER SETTING WAS 30.06.
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.