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Partial flap approach and landing performed by a B757-200 flight when their leading edge flaps do not extend during final approach to runway 31R at jfk.
| Attributes | |
| ACN | 638916 |
| Time | |
| Date | 200412 |
| Day | Wed |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | airport : jfk.airport |
| State Reference | NY |
| Altitude | agl bound lower : 0 agl bound upper : 2000 |
| Environment | |
| Flight Conditions | VMC |
| Weather Elements | Windshear |
| Light | Night |
| Aircraft 1 | |
| Controlling Facilities | tracon : n90.tracon |
| Operator | common carrier : air carrier |
| Make Model Name | B757-200 |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | ils localizer & glide slope : 31r other |
| Flight Phase | descent : approach |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| ASRS Report | 638916 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| ASRS Report | 638918 |
| Events | |
| Anomaly | aircraft equipment problem : critical maintenance problem : improper maintenance |
| Independent Detector | aircraft equipment other aircraft equipment : eicas and flap gauge other flight crewa other flight crewb |
| Resolutory Action | controller : provided flight assist flight crew : landed in emergency condition flight crew : declared emergency other |
| Consequence | other other |
| Factors | |
| Maintenance | performance deficiency : testing performance deficiency : fault isolation performance deficiency : inspection performance deficiency : repair |
| Supplementary | |
| Problem Areas | Maintenance Human Performance Company Aircraft |
| Primary Problem | Aircraft |
Narrative:
On final approach as flaps extended to 1 degree, EICAS message leading edge flap asymmetry, and leading edge flap annunciator. Ran both checklists for leading edge flap asymmetry, and jammed leading edge flaps per QRH. Landed flaps 20 degrees. Same write-up for the last 2 days on each flap extension before landing. Declared an emergency with approach as a precaution. After landing, no asymmetry noted but left flaps at 20 degrees for inspection. Supplemental information from acn 638918: I requested vectors away from the approach course to allow us to run a checklist. Captain accomplished the left slat disagree checklist followed by the left slat asymmetry checklist. Once in a landing confign, captain declared an emergency with approach control. We requested vectors back to the ILS course and landed uneventfully on runway 31R.
Original NASA ASRS Text
Title: PARTIAL FLAP APCH AND LNDG PERFORMED BY A B757-200 FLT WHEN THEIR LEADING EDGE FLAPS DO NOT EXTEND DURING FINAL APCH TO RWY 31R AT JFK.
Narrative: ON FINAL APCH AS FLAPS EXTENDED TO 1 DEG, EICAS MESSAGE LEADING EDGE FLAP ASYMMETRY, AND LEADING EDGE FLAP ANNUNCIATOR. RAN BOTH CHKLISTS FOR LEADING EDGE FLAP ASYMMETRY, AND JAMMED LEADING EDGE FLAPS PER QRH. LANDED FLAPS 20 DEGS. SAME WRITE-UP FOR THE LAST 2 DAYS ON EACH FLAP EXTENSION BEFORE LNDG. DECLARED AN EMER WITH APCH AS A PRECAUTION. AFTER LNDG, NO ASYMMETRY NOTED BUT LEFT FLAPS AT 20 DEGS FOR INSPECTION. SUPPLEMENTAL INFO FROM ACN 638918: I REQUESTED VECTORS AWAY FROM THE APCH COURSE TO ALLOW US TO RUN A CHKLIST. CAPT ACCOMPLISHED THE L SLAT DISAGREE CHKLIST FOLLOWED BY THE L SLAT ASYMMETRY CHKLIST. ONCE IN A LNDG CONFIGN, CAPT DECLARED AN EMER WITH APCH CTL. WE REQUESTED VECTORS BACK TO THE ILS COURSE AND LANDED UNEVENTFULLY ON RWY 31R.
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.