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37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
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An air carrier flight crew failed to set their altimeter to pressure altitude when passing through FL180. When they received a center clearance to maintain FL240, the flight crew leveled 400 ft high. Controller queried, but the source of the error was not discovered until the flight crew received a warning to not climb on TCASII.
| Attributes | |
| ACN | 326287 |
| Time | |
| Date | 199601 |
| Day | Thu |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : pxv |
| State Reference | IN |
| Altitude | msl bound lower : 24000 msl bound upper : 24400 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | Commercial Fixed Wing |
| Operating Under FAR Part | Part 121 |
| Flight Phase | climbout : intermediate altitude |
| Route In Use | enroute : on vectors enroute airway : zme |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 225 flight time total : 12000 flight time type : 7000 |
| ASRS Report | 326287 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 200 flight time total : 17000 flight time type : 8000 |
| ASRS Report | 326919 |
| Events | |
| Anomaly | altitude deviation : undershoot non adherence : clearance non adherence : far non adherence : required legal separation |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified other controllera |
| Resolutory Action | flight crew : returned to assigned altitude other other |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
Climbing out on a heading to avoid a thunderstorm ZME cleared us to FL270. After passing FL240 to FL270 ATC told us to descend back to FL240. Captain called ZME back level FL240. Several seconds passed, ZME called us, are you level FL240? Captain confirmed we were level FL240. Again several seconds passed before we got an RA (red band) on TCASII monitor vertical speed. At this point ZME said confirm FL240. We confirmed FL240. ZME said they showed 24400 ft on their radar equipment. At this point we were aware of our altimeter setting was not set to 29.92 and corrected for it. We feel if ZME would of told us they showed 24400 ft on the first call, the TCASII RA would not of occurred. Supplemental information from acn 326919: TCASII RA 'monitor vertical speed' showing red band of vsi (indicating do not climb) -- we put aircraft in shallow descent, received simultaneous 'clear of conflict' and realized altimeter setting was not at 29.92, reset altimeter to datum and continued flight.
Original NASA ASRS Text
Title: AN ACR FLC FAILED TO SET THEIR ALTIMETER TO PRESSURE ALT WHEN PASSING THROUGH FL180. WHEN THEY RECEIVED A CTR CLRNC TO MAINTAIN FL240, THE FLC LEVELED 400 FT HIGH. CTLR QUERIED, BUT THE SOURCE OF THE ERROR WAS NOT DISCOVERED UNTIL THE FLC RECEIVED A WARNING TO NOT CLB ON TCASII.
Narrative: CLBING OUT ON A HDG TO AVOID A TSTM ZME CLRED US TO FL270. AFTER PASSING FL240 TO FL270 ATC TOLD US TO DSND BACK TO FL240. CAPT CALLED ZME BACK LEVEL FL240. SEVERAL SECONDS PASSED, ZME CALLED US, ARE YOU LEVEL FL240? CAPT CONFIRMED WE WERE LEVEL FL240. AGAIN SEVERAL SECONDS PASSED BEFORE WE GOT AN RA (RED BAND) ON TCASII MONITOR VERT SPD. AT THIS POINT ZME SAID CONFIRM FL240. WE CONFIRMED FL240. ZME SAID THEY SHOWED 24400 FT ON THEIR RADAR EQUIP. AT THIS POINT WE WERE AWARE OF OUR ALTIMETER SETTING WAS NOT SET TO 29.92 AND CORRECTED FOR IT. WE FEEL IF ZME WOULD OF TOLD US THEY SHOWED 24400 FT ON THE FIRST CALL, THE TCASII RA WOULD NOT OF OCCURRED. SUPPLEMENTAL INFO FROM ACN 326919: TCASII RA 'MONITOR VERT SPD' SHOWING RED BAND OF VSI (INDICATING DO NOT CLB) -- WE PUT ACFT IN SHALLOW DSCNT, RECEIVED SIMULTANEOUS 'CLR OF CONFLICT' AND REALIZED ALTIMETER SETTING WAS NOT AT 29.92, RESET ALTIMETER TO DATUM AND CONTINUED FLT.
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.