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A commercial fixed wing light transport aircraft in climb at 16000 ft diverted and shut down #1 engine due to #1 engine pneumatic duct leak warning caused by faulty duct leak sensor.
| Attributes | |
| ACN | 416610 |
| Time | |
| Date | 199810 |
| Day | Wed |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | atc facility : jan |
| State Reference | MS |
| Altitude | msl bound lower : 16000 msl bound upper : 16000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Night |
| Aircraft 1 | |
| Controlling Facilities | artcc : zme |
| Operator | common carrier : air carrier |
| Make Model Name | Commercial Fixed Wing |
| Operating Under FAR Part | Part 135 |
| Navigation In Use | Other |
| Flight Phase | climbout : intermediate altitude other other |
| Route In Use | enroute airway : zme |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp pilot : cfi |
| Experience | flight time last 90 days : 140 flight time total : 5300 flight time type : 3100 |
| ASRS Report | 416610 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : commercial pilot : instrument |
| Events | |
| Anomaly | aircraft equipment problem : critical |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified other flight crewa |
| Resolutory Action | flight crew : declared emergency other |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Aircraft |
Narrative:
Climbing out of gtr we received a 'duct leak' warning on the left engine. The warning started out as intermittent, then became steady. We proceeded with the checklist which called for troubleshooting by closing the engine bleed, which did not extinguish the warning. After waiting for the 3 mins called for in the poh, we shut down the left engine, declared an emergency and diverted to jan. ATC handling was very helpful with TA's, and location from airport, etc. The warning was extinguished after the engine was secured, leading us to believe it was indeed a valid warning, but in close to jan the warning did flicker a few times, which with the engine shut down would indicate a faulty warning. The single engine approach and landing was uneventful. ATC even had the trucks waiting for us. After we shut down the right engine we did notice the duct leak again on the left engine -- obviously a faulty sensor.
Original NASA ASRS Text
Title: A COMMERCIAL FIXED WING LTT ACFT IN CLB AT 16000 FT DIVERTED AND SHUT DOWN #1 ENG DUE TO #1 ENG PNEUMATIC DUCT LEAK WARNING CAUSED BY FAULTY DUCT LEAK SENSOR.
Narrative: CLBING OUT OF GTR WE RECEIVED A 'DUCT LEAK' WARNING ON THE L ENG. THE WARNING STARTED OUT AS INTERMITTENT, THEN BECAME STEADY. WE PROCEEDED WITH THE CHKLIST WHICH CALLED FOR TROUBLESHOOTING BY CLOSING THE ENG BLEED, WHICH DID NOT EXTINGUISH THE WARNING. AFTER WAITING FOR THE 3 MINS CALLED FOR IN THE POH, WE SHUT DOWN THE L ENG, DECLARED AN EMER AND DIVERTED TO JAN. ATC HANDLING WAS VERY HELPFUL WITH TA'S, AND LOCATION FROM ARPT, ETC. THE WARNING WAS EXTINGUISHED AFTER THE ENG WAS SECURED, LEADING US TO BELIEVE IT WAS INDEED A VALID WARNING, BUT IN CLOSE TO JAN THE WARNING DID FLICKER A FEW TIMES, WHICH WITH THE ENG SHUT DOWN WOULD INDICATE A FAULTY WARNING. THE SINGLE ENG APCH AND LNDG WAS UNEVENTFUL. ATC EVEN HAD THE TRUCKS WAITING FOR US. AFTER WE SHUT DOWN THE R ENG WE DID NOTICE THE DUCT LEAK AGAIN ON THE L ENG -- OBVIOUSLY A FAULTY SENSOR.
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.