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An air carrier flight crew received a GPWS warning to 'pull up' while on short final approach and executed a go around. During the initial rotation, the flight crew notes that the trailing edge flaps only indicate 27 to 28 degrees in spite of being selected to 30 degrees.
| Attributes | |
| ACN | 326676 |
| Time | |
| Date | 199601 |
| Day | Tue |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : msp |
| State Reference | MN |
| Altitude | agl bound lower : 300 agl bound upper : 300 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tower : msp |
| Operator | common carrier : air carrier |
| Make Model Name | Large Transport, Low Wing, 3 Turbojet Eng |
| Flight Phase | descent : approach |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 130 flight time total : 14000 flight time type : 6000 |
| ASRS Report | 326676 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : instrument pilot : commercial |
| Events | |
| Anomaly | aircraft equipment problem : less severe inflight encounter : weather |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified other flight crewa |
| Resolutory Action | flight crew : overcame equipment problem other |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Aircraft |
| Air Traffic Incident | other |
Narrative:
On short final at 300 ft AGL, GPWS 'pull up' sounded. Go around was executed, and it was determined that a flap indicating problem was the cause. At flaps 30 degrees (normal landing setting), the inbound and outbound indications were 27-28 degrees. Alternate extension was used on the next approach, and a normal landing was made. Extreme cold on remain overnight and destination believed to be a factor in the flap indicating system.
Original NASA ASRS Text
Title: AN ACR FLC RECEIVED A GPWS WARNING TO 'PULL UP' WHILE ON SHORT FINAL APCH AND EXECUTED A GAR. DURING THE INITIAL ROTATION, THE FLC NOTES THAT THE TRAILING EDGE FLAPS ONLY INDICATE 27 TO 28 DEGS IN SPITE OF BEING SELECTED TO 30 DEGS.
Narrative: ON SHORT FINAL AT 300 FT AGL, GPWS 'PULL UP' SOUNDED. GAR WAS EXECUTED, AND IT WAS DETERMINED THAT A FLAP INDICATING PROB WAS THE CAUSE. AT FLAPS 30 DEGS (NORMAL LNDG SETTING), THE INBOUND AND OUTBOUND INDICATIONS WERE 27-28 DEGS. ALTERNATE EXTENSION WAS USED ON THE NEXT APCH, AND A NORMAL LNDG WAS MADE. EXTREME COLD ON REMAIN OVERNIGHT AND DEST BELIEVED TO BE A FACTOR IN THE FLAP INDICATING SYS.
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.