# SDR 97ZZZM1145

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 3, 1997
- Submitted: March 26, 2000
- Operation: Air carrier
- Aircraft: [N633AS](https://openairdocs.org/aircraft/N633AS), registered now
- Make and model: Aerosp ATR 72-212
- Registry model: [Aerosp ATR 72-212](https://openairdocs.org/model/aerospatiale-atr-72-212) (OpenAirDocs)
- Aircraft serial: 344
- System (JASC): [6120 · Propeller Controlling System](https://openairdocs.org/jasc/6120)
- Part: O-Rings
- Part number: M832481012
- Condition: Cut
- Location: Lt Pcu
- Stage of operation: CR
- Nature of condition: J, K
- Precautionary procedure: E
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/97ZZZM1145

## Discrepancy

DURING CRUISE FLT TRI-ATL, LEFT ENGINE LOST OIL PRESSURE AT 12,000 FEET MSL.  CCAS AND LOCAL ALERTS ACTIVATED.  LEFT ENGINE WAS SHUT DOWN PER THE QRH, FLIGHT CONTROL AND MAINTENANCE CONTROL WERE NOTIFIED.  AN EMERGENCY WAS DELCARED AND FLIGHT CONTINUED TO THE NEAREST SUITABLE AIRPORT (ATL) WHERE LANDING WAS MADE SAFELY WITHOUT FURTHER INCIDENT.  ATL MAINTENANCE FOUND PCU TRANSFER TUBE O-RINGS CUT.  REMOVED AND REPLACED LEFT PCU TRANSFER TUBE AND O-RINGS.  OPERATIONAL AND LEAK CHECKS WERE GOOD IAW/MM.  AIRCRAFT WAS RELEASED FOR FURTHER SERVICE.  (M)

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.