# SDR 98ZZZX120

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 4, 1997
- Submitted: March 26, 2000
- Operation: Air carrier
- Aircraft: [N767AT](https://openairdocs.org/aircraft/N767AT), registered now
- Make and model: Boeing 727227
- Aircraft serial: 22001
- System (JASC): [2910 · Hydraulic System, Main](https://openairdocs.org/jasc/2910)
- Part: Backup Ring
- Part number: 12BM228
- Condition: Crimped
- Location: Case Drain
- Stage of operation: CR
- Nature of condition: K, J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/98ZZZX120

## Discrepancy

IND - FLT 531 - AT CRUISE, HYDRAULIC QUANTITY ON A-SYSTEM DROPPED TO SLIGHTLY BELOW ONE GALLON.  PILOT DIVERTED TO INDIANAPOLIS AIRPORT.  NR 2 ENGINE DRIVEN HYDRAULIC CASE DRAIN FILTER BACK-UP RING WAS FOUND UNSEATED.  REPLACED O-RING AND BACK-UP RINGS, RUN TESTED, NO LEAKS NOTED.

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