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A B767-300ER was dispatched in non compliance with the left engine aft core cowl not secured. Cowling opened in-flight incurring damage and resulting emergency landing.
| Attributes | |
| ACN | 559171 |
| Time | |
| Date | 200209 |
| Day | Sun |
| Place | |
| Locale Reference | airport : zzz.airport |
| State Reference | US |
| Altitude | agl single value : 0 |
| Aircraft 1 | |
| Controlling Facilities | tower : cle.tower |
| Operator | common carrier : air carrier |
| Make Model Name | B767-300 and 300 ER |
| Operating Under FAR Part | Part 121 |
| Flight Phase | ground : maintenance |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | maintenance : technician |
| Qualification | technician : powerplant technician : airframe |
| ASRS Report | 559171 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | maintenance : technician |
| Events | |
| Anomaly | aircraft equipment problem : critical maintenance problem : improper maintenance maintenance problem : improper documentation non adherence : far non adherence : published procedure |
| Resolutory Action | flight crew : diverted to another airport flight crew : declared emergency flight crew : landed in emergency condition |
| Consequence | other other other |
| Factors | |
| Maintenance | contributing factor : schedule pressure performance deficiency : scheduled maintenance performance deficiency : testing performance deficiency : installation performance deficiency : inspection |
| Supplementary | |
| Problem Areas | Aircraft Maintenance Human Performance |
| Primary Problem | Maintenance Human Performance |
Narrative:
I had worked on the aircraft layover. I also did the start stability bleed inspection on the l-hand engine operation. I recall latching the aft core cowl on the left engine. I went home that day and I was called to be informed that the aircraft I worked on had an air turn around and emergency land because the core cowl had opened in-flight. This was disturbing because I recall closing it and my partner on the job took a look after I closed the engine as required for inspection. The only probable cause I can think of is the latch failed.
Original NASA ASRS Text
Title: A B767-300ER WAS DISPATCHED IN NON COMPLIANCE WITH THE L ENG AFT CORE COWL NOT SECURED. COWLING OPENED INFLT INCURRING DAMAGE AND RESULTING EMER LNDG.
Narrative: I HAD WORKED ON THE ACFT LAYOVER. I ALSO DID THE START STABILITY BLEED INSPECTION ON THE L-HAND ENG OP. I RECALL LATCHING THE AFT CORE COWL ON THE L ENG. I WENT HOME THAT DAY AND I WAS CALLED TO BE INFORMED THAT THE ACFT I WORKED ON HAD AN AIR TURN AROUND AND EMER LAND BECAUSE THE CORE COWL HAD OPENED INFLT. THIS WAS DISTURBING BECAUSE I RECALL CLOSING IT AND MY PARTNER ON THE JOB TOOK A LOOK AFTER I CLOSED THE ENG AS REQUIRED FOR INSPECTION. THE ONLY PROBABLE CAUSE I CAN THINK OF IS THE LATCH FAILED.
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.