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| Date: | Saturday 9 September 2017 |
| Time: | |
| Type: |  Boeing 737-8B6 (WL) |
| Owner/operator: | Royal Air Maroc - RAM |
| Registration: | CN-RNW |
| MSN: | 33057/1347 |
| Year of manufacture: | 2003 |
| Engine model: | CFMI CFM56-7B |
| Fatalities: | Fatalities: 0 / Occupants: |
| Other fatalities: | 0 |
| Aircraft damage: | None |
| Category: | Incident |
| Location: | near Lisboa -
 Portugal
|
| Phase: | En route |
| Nature: | Passenger - Scheduled |
| Departure airport: | Lisboa-Humberto Delgado Airport (LIS/LPPT) |
| Casablanca-Mohamed V Airport (CMN/GMMN) | |
| Investigating agency: | BEA Maroc |
| Confidence Rating: |  Accident investigation report completed and information captured |
One of the engines failed during climb.
Probable causes
The clogging of the filter in Engine 1, which led the crew to bring the engine to a controlled shutdown in flight, was most likely due to excessive silicone in the clogged oil filter.
This silicone, which contaminated the engine's lubricating oil, was most likely caused by the silicone:
- An infiltration of a material from outside through the filter (sand for example);
- An internal degradation of a component of the filter;
- A degradation of one of the components of the lubrication system.
Accident investigation:
 |
|
Sources:
https://www.bea.aero/en/investigation-reports/notified-events/detail/event/serious-incident-to-the-boeing-737-registered-cn-rnw-and-operated-by-royal-air-maroc-on-09092017-a/
http://www.aviationcivile.gov.ma/wp-content/uploads/2019/07/Report-CN-RNW.pdf
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 28-Sep-2017 16:59 | harro | Added |
| 25-Jun-2020 16:34 | KagurazakaHanayo | Updated [Departure airport, Source, Narrative, ] |
| 25-Jun-2020 16:36 | harro | Updated [Narrative, Accident report, ] |
Corrections or additions? ... Edit this accident description
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