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Flight crew of an medium large transport overshot descent altitude when they mistakenly believed and acknowledged clearance to descend to 10000 ft instead of clearance for an ILS to runway 10. ATC advised that there were no conflicts as a result of this mistake.
| Attributes | |
| ACN | 382415 |
| Time | |
| Date | 199710 |
| Day | Fri |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : mcb airport : msy |
| State Reference | MS |
| Altitude | msl bound lower : 10000 msl bound upper : 11000 |
| Environment | |
| Flight Conditions | IMC |
| Light | Daylight |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | Commercial Fixed Wing |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | Other Other |
| Flight Phase | descent other |
| Route In Use | arrival other arrival star : star enroute airway : msy |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | other other : other pilot : instrument pilot : commercial pilot : flight engineer |
| Experience | flight time last 90 days : 210 flight time total : 10000 flight time type : 5000 |
| ASRS Report | 382415 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp pilot : flight engineer |
| Experience | flight time last 90 days : 210 flight time total : 14000 flight time type : 6000 |
| ASRS Report | 382770 |
| Events | |
| Anomaly | altitude deviation : crossing restriction not met altitude deviation : overshoot non adherence : clearance |
| Independent Detector | other controllera |
| Resolutory Action | controller : issued new clearance other |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
In the descent on rythm arrival to msy, ZHU cleared us to cross rythm at 250 KIAS, 11000 ft. Approaching 11000 ft, changed to approach control and instructed by approach to proceed direct to kinte OM for ILS to runway 10. With commotion in cockpit (RNAV changes, briefings, etc), mistook clearance to runway 10 as clearance to 10000 ft. Resulted in descent to 10000 ft without clearance. New orleans approach questioned assigned altitude, no conflicts occurred, and approach said no problems were caused. Solutions: more attention on flight deck to clearance and more attention to use of terminology -- 'runway 10' versus just '10.' also attention to flight crew readback of 10000 ft clearance.
Original NASA ASRS Text
Title: FLC OF AN MLG OVERSHOT DSCNT ALT WHEN THEY MISTAKENLY BELIEVED AND ACKNOWLEDGED CLRNC TO DSND TO 10000 FT INSTEAD OF CLRNC FOR AN ILS TO RWY 10. ATC ADVISED THAT THERE WERE NO CONFLICTS AS A RESULT OF THIS MISTAKE.
Narrative: IN THE DSCNT ON RYTHM ARR TO MSY, ZHU CLRED US TO CROSS RYTHM AT 250 KIAS, 11000 FT. APCHING 11000 FT, CHANGED TO APCH CTL AND INSTRUCTED BY APCH TO PROCEED DIRECT TO KINTE OM FOR ILS TO RWY 10. WITH COMMOTION IN COCKPIT (RNAV CHANGES, BRIEFINGS, ETC), MISTOOK CLRNC TO RWY 10 AS CLRNC TO 10000 FT. RESULTED IN DSCNT TO 10000 FT WITHOUT CLRNC. NEW ORLEANS APCH QUESTIONED ASSIGNED ALT, NO CONFLICTS OCCURRED, AND APCH SAID NO PROBS WERE CAUSED. SOLUTIONS: MORE ATTN ON FLT DECK TO CLRNC AND MORE ATTN TO USE OF TERMINOLOGY -- 'RWY 10' VERSUS JUST '10.' ALSO ATTN TO FLC READBACK OF 10000 FT CLRNC.
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.