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37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
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B737-500 received altimeter setting via digital ATIS and a comrdo printout in the cockpit. They advised approach controller they had the information and idented which information they had received. Approach control did not challenge this. The ATIS gave the altimeter setting as 30 pt 02 while the true altimeter setting was 30 pt 51 which caused a 500 ft altitude discrepancy.
| Attributes | |
| ACN | 359035 |
| Time | |
| Date | 199701 |
| Day | Sun |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : cle |
| State Reference | OH |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : cle |
| Operator | common carrier : air carrier |
| Make Model Name | B737-500 |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | Other Other |
| Flight Phase | descent : approach |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : instrument pilot : atp |
| Experience | flight time last 90 days : 250 flight time total : 15000 flight time type : 4000 |
| ASRS Report | 359035 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : commercial pilot : instrument |
| Events | |
| Anomaly | altitude deviation : undershoot |
| Independent Detector | other flight crewa |
| Resolutory Action | flight crew : returned to intended course or assigned course |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Navigational Facility |
| Air Traffic Incident | other |
| Situations | |
| ATC Facility | procedure or policy : unspecified |
Narrative:
We received the digital ATIS via ACARS/aircraft printer. My experience has been that if the digital ATIS is not available for a particular airport then you either don't get anything or you get a printout that says 'D-ATIS not available.' in this case we received a normal ATIS message with, among other things, an altimeter of 30.02. On our initial call to approach we stated that we had ATIS information. This was not challenged or questioned by the controller. On final, when the radio altimeters came alive we noticed a discrepancy of about 500 ft when compared with the barometric altitude. We inquired as to the altimeter setting and were told it was 30.51. After landing, I called tower and was told that the digital ATIS was in testing and would become operational in 4 days and that it wasn't currently being updated. I suggest put a statement in the digital ATIS remarks to the effect that the digital ATIS is OTS so we will know in the future when a test message is received.
Original NASA ASRS Text
Title: B737-500 RECEIVED ALTIMETER SETTING VIA DIGITAL ATIS AND A COMRDO PRINTOUT IN THE COCKPIT. THEY ADVISED APCH CTLR THEY HAD THE INFO AND IDENTED WHICH INFO THEY HAD RECEIVED. APCH CTL DID NOT CHALLENGE THIS. THE ATIS GAVE THE ALTIMETER SETTING AS 30 PT 02 WHILE THE TRUE ALTIMETER SETTING WAS 30 PT 51 WHICH CAUSED A 500 FT ALT DISCREPANCY.
Narrative: WE RECEIVED THE DIGITAL ATIS VIA ACARS/ACFT PRINTER. MY EXPERIENCE HAS BEEN THAT IF THE DIGITAL ATIS IS NOT AVAILABLE FOR A PARTICULAR ARPT THEN YOU EITHER DON'T GET ANYTHING OR YOU GET A PRINTOUT THAT SAYS 'D-ATIS NOT AVAILABLE.' IN THIS CASE WE RECEIVED A NORMAL ATIS MESSAGE WITH, AMONG OTHER THINGS, AN ALTIMETER OF 30.02. ON OUR INITIAL CALL TO APCH WE STATED THAT WE HAD ATIS INFO. THIS WAS NOT CHALLENGED OR QUESTIONED BY THE CTLR. ON FINAL, WHEN THE RADIO ALTIMETERS CAME ALIVE WE NOTICED A DISCREPANCY OF ABOUT 500 FT WHEN COMPARED WITH THE BAROMETRIC ALT. WE INQUIRED AS TO THE ALTIMETER SETTING AND WERE TOLD IT WAS 30.51. AFTER LNDG, I CALLED TWR AND WAS TOLD THAT THE DIGITAL ATIS WAS IN TESTING AND WOULD BECOME OPERATIONAL IN 4 DAYS AND THAT IT WASN'T CURRENTLY BEING UPDATED. I SUGGEST PUT A STATEMENT IN THE DIGITAL ATIS REMARKS TO THE EFFECT THAT THE DIGITAL ATIS IS OTS SO WE WILL KNOW IN THE FUTURE WHEN A TEST MESSAGE IS RECEIVED.
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.