# Incident 20091206052169I: Boeing 737-824, Helena, MT, December 6, 2009

- Type: FAA incident report (Accident/Incident Data System), as reported
- Date: December 6, 2009, 21:30 local time
- Place: Helena, MT
- Airport: Helena Airport
- Damage: No damage
- Phase of flight: Cruise/Level Flight
- Operating rules: Air carrier (Part 121)
- Operator: CALA
- Location: 46.6067° N, 111.9833° W: Placed by OpenAirDocs at HELENA RGNL (HLN), within about a mile (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=46.6067&lon=-111.9833&mi=10
- Aircraft: N17233, registered now (https://openairdocs.org/aircraft/N17233) (OpenAirDocs)
- Registry model: Boeing 737-824 (registry code 13844BZ, https://openairdocs.org/model/boeing-737-824) (OpenAirDocs)
- Registry engine: CFM International CFM56 series (registry code 13802, https://openairdocs.org/engine/cfm-international-cfm56-series) (OpenAirDocs)
- Reported make and model: BOEING 737-824
- Reported engine: CFM INTL. CFM56 SERIES
- Fatal injuries: 0
- Other injuries: 0
- Pilot flight hours: 0 total, 0 in this make and model, 0 in the last 90 days
- FAA source: FAA Aviation Safety Information Portal (https://asip.faa.gov/)
- Page: https://openairdocs.org/incident/20091206052169I

## Narrative

As the FAA filed it, in capitals; the FAA replaces private details with ^PRIVACY DATA OMITTED^.

CREW SAW THE #1 ENGINE OIL FILTER BYPASS ANNUNCIATOR LIGHT COME ON DURING CRUISE FLIGHT, CREW FOLLOWED QRH PROCEDURE AND REDUCED POWER TO IDLE, TO SEE IF BYPASS LIGHT WOULD GO OUT.  THE LIGHT DID NOT GO OUT, SO CREW COMPLETED INFLIGHT SHUT DOWN PROCEDURES PER THE QRH.  EMERGENCY WAS DECLARED, AIRCRAFT DIVERTED TO HLN, & LANDED WITHOUT FURTHER INCIDENT.  THE MAIN OIL FILTER WAS FOUND TO HAVE METAL  FLAKES.  THE #1 FWD CHIP DETECTOR HAD SMALL METAL PIECES, 1/16" TO 1/8".  THE METAL FOUND WAS A MIX OF FERROUS, NONFERROUS AND COPPER/BRASS. THE ENGINE WAS REMOVED, BASED ON TOO MUCH METAL PRESENT IN THE OIL FOR AN OIL SYSTEM FLUSH AND RUN CHECK.

## Other reports on N17233 (1)

Matched to the same aircraft by N-number and date.

- [Incident 20160503007859I](https://openairdocs.org/incident/20160503007859I), May 3, 2016: Boeing 737-824 (N17233), Los Angeles, CA, Minor damage. Right main landing gear tire failed during takeoff from houston. After landing at lax, the aircraft was inspected, and repairs were accomplished. The aircraft…

From the FAA Accident/Incident Data System. Reports are matched to registry aircraft by N-number and event date, checked against the reported make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model. For accidents, the NTSB's own investigation is the fuller record.

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