# SDR AALA202504073991

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 6, 2025
- Submitted: April 8, 2025
- Operation: Air carrier
- Aircraft: [N907AN](https://openairdocs.org/aircraft/N907AN), registered now
- Make and model: Boeing 737823
- Aircraft serial: 29509
- Aircraft time: 73,301 hours, 30,433 cycles
- Engine: Cfmint CFM567B242
- Engine time: 33,414 hours, 14,334 cycles
- System (JASC): [7261 · Turbine Engine Oil System](https://openairdocs.org/jasc/7261)
- Part: Oil System
- Condition: Bypassing
- Location: Nr 2 Engine
- Stage of operation: CR
- How discovered: O
- Nature of condition: J
- Precautionary procedure: E, A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA202504073991

## Discrepancy

AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED DUE TO: WHILE IN CRUISE AT FL 370 AT MACH .79 WE GOT AN OIL FILTER BYPASS ON ENGINE 2 WITH NO OTHER ASSOCIATED ABNORMALITIES. OIL PRESSURE, OIL TEMP, AND QUANTITY WERE ALL WITHIN NORMAL RANGE. WHILE RUNNING QRH WE REDUCED POWER TO APPROX 65% N1 AND MESSAGE EXTINGUISHED MOMENTARILY THEN REAPPEARED EVEN WITH POWER AT IDLE. THIS THEN LED TO AN ENGINE SHUTDOWN; AFTER LANDING A VISIBLE OIL STREAK WAS FOUND ON THE COWLING. AIRCRAFT DIVERTED TO AND LANDED SAFELY AT CVG.  (OPEN).

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