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When trailing edge flaps did not show 30 degrees on gauge when flap handle in 30 degree position, captain lowered flap handle until gauge showed 30 degrees and continued to normal landing.
| Attributes | |
| ACN | 199190 |
| Time | |
| Date | 199201 |
| Day | Thu |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | airport : bhm |
| State Reference | AL |
| Altitude | msl bound lower : 2000 msl bound upper : 2000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tower : bhm |
| Operator | common carrier : air carrier |
| Make Model Name | Large Transport, Low Wing, 3 Turbojet Eng |
| Flight Phase | descent : approach descent other landing other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp pilot : commercial pilot : flight engineer pilot : instrument |
| Experience | flight time last 90 days : 95 flight time total : 9000 flight time type : 6500 |
| ASRS Report | 199190 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : instrument pilot : atp pilot : commercial |
| Events | |
| Anomaly | aircraft equipment problem : less severe |
| Independent Detector | other flight crewa |
| Resolutory Action | flight crew : overcame equipment problem |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Aircraft |
| Air Traffic Incident | other |
Narrative:
Flaps were selected from 25 degrees to 30 degrees. Outboards moved but did not enter the 30 degree flap band on gauge. Moved flap handle below 30 degrees and then returned handle to detent when flaps entered 30 degree band. Completed landing checklist. Did not feel safety would have been enhanced by going around and completing trailing edge flap abnormal checklist, since flaps were not stuck or split. Problem was found to be gauge calibration error.
Original NASA ASRS Text
Title: WHEN TRAILING EDGE FLAPS DID NOT SHOW 30 DEGS ON GAUGE WHEN FLAP HANDLE IN 30 DEG POS, CAPT LOWERED FLAP HANDLE UNTIL GAUGE SHOWED 30 DEGS AND CONTINUED TO NORMAL LNDG.
Narrative: FLAPS WERE SELECTED FROM 25 DEGS TO 30 DEGS. OUTBOARDS MOVED BUT DID NOT ENTER THE 30 DEG FLAP BAND ON GAUGE. MOVED FLAP HANDLE BELOW 30 DEGS AND THEN RETURNED HANDLE TO DETENT WHEN FLAPS ENTERED 30 DEG BAND. COMPLETED LNDG CHKLIST. DID NOT FEEL SAFETY WOULD HAVE BEEN ENHANCED BY GOING AROUND AND COMPLETING TRAILING EDGE FLAP ABNORMAL CHKLIST, SINCE FLAPS WERE NOT STUCK OR SPLIT. PROBLEM WAS FOUND TO BE GAUGE CALIBRATION ERROR.
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.