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A B767-300 had a leading edge slat asymmetry fault during preflight which was repaired but reoccurred again at cruise when the flap gauge falsely indicated the flaps extended just beyond up. The flight continued to its destination because the flight controls felt normal.
| Attributes | |
| ACN | 929426 |
| Time | |
| Date | 201101 |
| Local Time Of Day | 0001-0600 |
| Place | |
| Locale Reference | ZZZ.ARTCC |
| State Reference | US |
| Environment | |
| Flight Conditions | VMC |
| Light | Night |
| Aircraft 1 | |
| Make Model Name | B767-300 and 300 ER |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Cruise Landing |
| Flight Plan | IFR |
| Component | |
| Aircraft Component | Flap/Slat Indication |
| Person 1 | |
| Function | Pilot Flying First Officer |
| Person 2 | |
| Function | Captain Pilot Not Flying |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Experience | Flight Crew Last 90 Days 200 Flight Crew Total 17000 Flight Crew Type 2000 |
| Events | |
| Anomaly | Aircraft Equipment Problem Less Severe Deviation - Procedural Maintenance |
Narrative:
At cruise we got an EICAS message 'le slat asym' with the indicator light. Also the flap indicator showed flaps half way between up and 1. There was no pitching or rolling moment so we were 100% sure it was just an indication problem so we decided to press on to our destination where we knew we would have plenty of runway in the event of a worse case flaps up scenario. The main factor was fatigue after a three hour delay and a difficult all-nighter to start with causing us to use a lot more effort than we normally would have.
Original NASA ASRS Text
Title: A B767-300 had a leading edge slat asymmetry fault during preflight which was repaired but reoccurred again at cruise when the flap gauge falsely indicated the flaps extended just beyond up. The flight continued to its destination because the flight controls felt normal.
Narrative: At cruise we got an EICAS message 'LE SLAT ASYM' with the indicator light. Also the flap indicator showed flaps half way between up and 1. There was no pitching or rolling moment so we were 100% sure it was just an indication problem so we decided to press on to our destination where we knew we would have plenty of runway in the event of a worse case flaps up scenario. The main factor was fatigue after a three hour delay and a difficult all-nighter to start with causing us to use a lot more effort than we normally would have.
Data retrieved from NASA's ASRS site as of April 2012 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.