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A320 flight crew reports captain airspeed indicating 40 knots less than first officer airspeed indicator during approach.
| Attributes | |
| ACN | 792263 |
| Time | |
| Date | 200806 |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : zzz.airport |
| State Reference | US |
| Altitude | msl single value : 18000 |
| Environment | |
| Flight Conditions | IMC |
| Aircraft 1 | |
| Controlling Facilities | artcc : zzz.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | A320 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | descent : approach |
| Route In Use | arrival star : n/s |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Experience | flight time last 90 days : 230 flight time total : 15000 flight time type : 5000 |
| ASRS Report | 792263 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Events | |
| Anomaly | aircraft equipment problem : critical |
| Independent Detector | other flight crewa |
| Resolutory Action | controller : issued new clearance flight crew : overcame equipment problem |
| Consequence | other |
| Supplementary | |
| Problem Areas | Aircraft |
| Primary Problem | Aircraft |
Narrative:
On descent; called for flaps 1 degree. First officer queried 'what is your speed?' at this time we realized captain's airspeed indicator read 40 KTS lower than first officer's. Advised ATC we could not accept approach; that we had an airspeed indication issue to work out. ATC issued delay vectors. We called dispatch and maintenance; selected air data to 3 and speeds matched. Checked flight handbook to see additional procedures. Uneventful landing. Advised to have mechanic meet aircraft to explain our indications; and that no ECAM message displayed for the airspeed error.
Original NASA ASRS Text
Title: A320 FLT CREW REPORTS CAPT AIRSPEED INDICATING 40 KNOTS LESS THAN FO AIRSPEED INDICATOR DURING APPROACH.
Narrative: ON DSCNT; CALLED FOR FLAPS 1 DEG. FO QUERIED 'WHAT IS YOUR SPD?' AT THIS TIME WE REALIZED CAPT'S AIRSPD INDICATOR READ 40 KTS LOWER THAN FO'S. ADVISED ATC WE COULD NOT ACCEPT APCH; THAT WE HAD AN AIRSPD INDICATION ISSUE TO WORK OUT. ATC ISSUED DELAY VECTORS. WE CALLED DISPATCH AND MAINT; SELECTED AIR DATA TO 3 AND SPDS MATCHED. CHKED FLT HANDBOOK TO SEE ADDITIONAL PROCS. UNEVENTFUL LNDG. ADVISED TO HAVE MECH MEET ACFT TO EXPLAIN OUR INDICATIONS; AND THAT NO ECAM MESSAGE DISPLAYED FOR THE AIRSPD ERROR.
Data retrieved from NASA's ASRS site as of May 2009 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.