# SDR AALA202105039010

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 29, 2021
- Submitted: May 3, 2021
- Operation: Air carrier
- Aircraft: [N991AN](https://openairdocs.org/aircraft/N991AN), registered now
- Make and model: Boeing 737823
- Aircraft serial: 30920
- Aircraft time: 36,008 hours, 14,625 cycles
- Engine: Cfmint CFM567B242
- System (JASC): [7920 · Engine Oil Distribution (Airframe Furnished)](https://openairdocs.org/jasc/7920)
- Part: Seal
- Condition: Leaking
- Location: Oil Scav Filter
- Stage of operation: CR
- How discovered: O
- Nature of condition: K, J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA202105039010

## Discrepancy

AIRCRAFT WAS GROUNDED: ENGINE OIL DECREASED DURING FLIGHT. #2 ENGINE FROM 9 QTS AT CRUISE DOWN TO 4 QTS. DECISION MADE TO DIVERT TO MSY. EMERGENCY DECLARED. TEMPERATURE AND PRESSURE NORMAL THROUGHOUT. OIL QUANTITY AS LOW AS 2 QTS ON APPROACH. FOUND OIL LEAK AT THE SCAVENGE OIL FILTER RETURN LINE AND CLOGGING TRANSMITTER BASE. REMOVED AND REPLACE TRANSMITTER (AALA202105019001) IAW AMM 79-21-07. REMOVED AND REPLACED BOTH SEALS (AALA202105039010) AT OIL RETURN LINE IAW AMM 79-21-04.

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