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Flight crew of an MD11 undershot cruise altitude due to forgetting to reset their altimeters when climbing through FL180. ARTCC controller asked the crew if they had reset altimeters, to which the crew found that they had not.
| Attributes | |
| ACN | 427422 |
| Time | |
| Date | 199902 |
| Day | Fri |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | atc facility : fsm |
| State Reference | AR |
| Altitude | msl bound lower : 30600 msl bound upper : 31000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Night |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | MD-11 |
| Navigation In Use | Other |
| Flight Phase | cruise other |
| Route In Use | enroute airway : zme |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Experience | flight time last 90 days : 60 flight time total : 25000 flight time type : 2000 |
| ASRS Report | 427422 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : commercial |
| Events | |
| Anomaly | altitude deviation : undershoot other anomaly other |
| Independent Detector | other controllera |
| Resolutory Action | other |
| Consequence | Other |
| Supplementary | |
| Air Traffic Incident | Pilot Deviation |
Narrative:
Center asked us if we had switched our altimeters to 29.92. We had not, resulting in an altitude error of -400 ft. Traffic was passing underneath right to left at an unknown altitude. Switchover was not done due to ATC xmissions as we neared and passed FL180. TCASII (which we do not have) would have alerted us to the error by showing crossing traffic less than standard separation. Strongly recommend TCASII for freighter MD11's.
Original NASA ASRS Text
Title: FLC OF AN MD11 UNDERSHOT CRUISE ALT DUE TO FORGETTING TO RESET THEIR ALTIMETERS WHEN CLBING THROUGH FL180. ARTCC CTLR ASKED THE CREW IF THEY HAD RESET ALTIMETERS, TO WHICH THE CREW FOUND THAT THEY HAD NOT.
Narrative: CTR ASKED US IF WE HAD SWITCHED OUR ALTIMETERS TO 29.92. WE HAD NOT, RESULTING IN AN ALT ERROR OF -400 FT. TFC WAS PASSING UNDERNEATH R TO L AT AN UNKNOWN ALT. SWITCHOVER WAS NOT DONE DUE TO ATC XMISSIONS AS WE NEARED AND PASSED FL180. TCASII (WHICH WE DO NOT HAVE) WOULD HAVE ALERTED US TO THE ERROR BY SHOWING XING TFC LTSS. STRONGLY RECOMMEND TCASII FOR FREIGHTER MD11'S.
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.