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Flight crew of an light transport air carrier aircraft failed to stop climb at assigned altitude due to misunderstanding of clearance.
| Attributes | |
| ACN | 252203 |
| Time | |
| Date | 199309 |
| Day | Fri |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : tus |
| State Reference | AZ |
| Altitude | msl bound lower : 18000 msl bound upper : 18300 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zab |
| Operator | common carrier : air carrier |
| Make Model Name | Light Transport, Low Wing, 2 Turboprop Eng |
| Navigation In Use | Other Other |
| Flight Phase | climbout : intermediate altitude |
| Route In Use | enroute airway : zab |
| Flight Plan | IFR |
| Aircraft 2 | |
| Make Model Name | Any Unknown or Unlisted Aircraft Manufacturer |
| Flight Phase | cruise other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : flight engineer pilot : atp |
| Experience | flight time last 90 days : 200 flight time total : 7500 flight time type : 1000 |
| ASRS Report | 252203 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : commercial pilot : atp |
| Experience | flight time last 90 days : 150 flight time total : 4000 flight time type : 150 |
| ASRS Report | 252484 |
| Events | |
| Anomaly | altitude deviation : overshoot conflict : airborne less severe non adherence : clearance non adherence : required legal separation |
| Independent Detector | atc equipment other atc equipment : unspecified other controllera |
| Resolutory Action | flight crew : returned to intended course or assigned course other |
| Consequence | faa : reviewed incident with flight crew |
| Miss Distance | horizontal : 0 vertical : 700 |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
Told by controller to maintain FL190 and expect to climb to FL200 after traffic passes. At 18300 ft controller (ZAB) asked to check altitude and descend to FL180 as cleared. TCASII had pilot's first attention as it announced RA at 1500 ft separation. Subsequent phone call to ZAB revealed that 180 had been assigned with absolutely no recollection by either pilot or copilot. 19000 was in altitude alerter in cockpit at time of incident.
Original NASA ASRS Text
Title: FLC OF AN LTT ACR ACFT FAILED TO STOP CLB AT ASSIGNED ALT DUE TO MISUNDERSTANDING OF CLRNC.
Narrative: TOLD BY CTLR TO MAINTAIN FL190 AND EXPECT TO CLB TO FL200 AFTER TFC PASSES. AT 18300 FT CTLR (ZAB) ASKED TO CHK ALT AND DSND TO FL180 AS CLRED. TCASII HAD PLT'S FIRST ATTN AS IT ANNOUNCED RA AT 1500 FT SEPARATION. SUBSEQUENT PHONE CALL TO ZAB REVEALED THAT 180 HAD BEEN ASSIGNED WITH ABSOLUTELY NO RECOLLECTION BY EITHER PLT OR COPLT. 19000 WAS IN ALT ALERTER IN COCKPIT AT TIME OF INCIDENT.
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.