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A B757-200 crew reports a trailing edge flap malfunction occurring as the flaps were being selected for landing. An emergency was declared.
| Attributes | |
| ACN | 706431 |
| Time | |
| Date | 200608 |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : zzz.airport |
| State Reference | US |
| Altitude | msl single value : 1200 |
| Environment | |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tower : zzz.tower |
| Operator | common carrier : air carrier |
| Make Model Name | B757-200 |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | ils localizer & glide slope : zzz |
| Flight Phase | descent : approach |
| Route In Use | approach : instrument precision |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| ASRS Report | 706431 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| ASRS Report | 706433 |
| Events | |
| Anomaly | aircraft equipment problem : less severe |
| Independent Detector | aircraft equipment other aircraft equipment : flap disagree light other flight crewa other flight crewb |
| Resolutory Action | flight crew : landed in emergency condition flight crew : executed go around flight crew : declared emergency |
| Consequence | other |
| Supplementary | |
| Problem Areas | Aircraft |
| Primary Problem | Aircraft |
Narrative:
On approach to FAF/marker runway 9; flaps were set at 20 degrees. Selected flaps 25 degrees. The trailing edge flap disagreement light came on. Flap gauge indicated flaps were still at 20 degrees. Re-selected flaps 20 degrees with the flap handle momentarily and then re-selected flaps 25 degrees. No change in the flap gauge indication or trailing edge flap disagreement light. Initiated go around with flap handle and gauge both at flaps 20 degrees. Performed appropriate checklist; declared emergency with ATC; then made approach and landing as per checklist on runway 9. Crash fire rescue equipment equipment visually inspected flap and wing area and reported nothing unusual or leaks. Left flap handle at 20 degrees through parking checklist. Notified maintenance; dispatch; and on-duty chief pilot at flight office.
Original NASA ASRS Text
Title: A B757-200 CREW RPTS A TRAILING EDGE FLAP MALFUNCTION OCCURRING AS THE FLAPS WERE BEING SELECTED FOR LNDG. AN EMER WAS DECLARED.
Narrative: ON APCH TO FAF/MARKER RWY 9; FLAPS WERE SET AT 20 DEGS. SELECTED FLAPS 25 DEGS. THE TRAILING EDGE FLAP DISAGREEMENT LIGHT CAME ON. FLAP GAUGE INDICATED FLAPS WERE STILL AT 20 DEGS. RE-SELECTED FLAPS 20 DEGS WITH THE FLAP HANDLE MOMENTARILY AND THEN RE-SELECTED FLAPS 25 DEGS. NO CHANGE IN THE FLAP GAUGE INDICATION OR TRAILING EDGE FLAP DISAGREEMENT LIGHT. INITIATED GAR WITH FLAP HANDLE AND GAUGE BOTH AT FLAPS 20 DEGS. PERFORMED APPROPRIATE CHKLIST; DECLARED EMER WITH ATC; THEN MADE APCH AND LNDG AS PER CHKLIST ON RWY 9. CFR EQUIP VISUALLY INSPECTED FLAP AND WING AREA AND RPTED NOTHING UNUSUAL OR LEAKS. L FLAP HANDLE AT 20 DEGS THROUGH PARKING CHKLIST. NOTIFIED MAINT; DISPATCH; AND ON-DUTY CHIEF PLT AT FLT OFFICE.
Data retrieved from NASA's ASRS site as of January 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.