# SDR AALA20090720SJU01

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 19, 2009
- Submitted: July 23, 2009
- Operation: Air carrier
- Aircraft: [N904AN](https://openairdocs.org/aircraft/N904AN), registered now
- Make and model: Boeing 737823
- Aircraft serial: 29506
- Aircraft time: 30,591 hours, 12,321 cycles
- System (JASC): [2910 · Hydraulic System, Main](https://openairdocs.org/jasc/2910)
- Part: Seal
- Part number: 4084299
- Condition: Damaged
- Location: Hydraulic Sys
- Stage of operation: CR
- How discovered: O
- Nature of condition: K
- Precautionary procedure: B
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA20090720SJU01

## Discrepancy

MBJ - DURING CRUISE HYDRAULIC SYSTEM A QUANTITY LOST, AFTER LANDING QUANTITY AT 7 PERCENT QUANTITY DURING CRUISE VARIED FROM % 12 - % 20. HYDRAULIC PUMPS NEVER DISPLAYED LESS THAN NORMAL PRESSURE WHEN SWITCHED ON.  OPS CHECK PROBE LEAK AT ACOUSTIC FILTER LOWER FITTING.  O-RING FITTING REMOVED TO FACILITATE O-RING (P/N NAS1612-8A) CHANGE REPLACE FITTING AND RESERVICE HYDRAULIC RESERVOIR SYSTEM.  SYSTEM GROUND CHECK NORMAL OPERATION.

---
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.