# SDR XA12003F00000

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 2, 2003
- Submitted: February 3, 2003
- Operation: Air carrier
- Aircraft: [N754TA](https://openairdocs.org/aircraft/N754TA), registered now
- Make and model: Raythn HAWKER800XP
- Aircraft serial: 258406
- Engine: Garrtt TFE731*
- System (JASC): [4990 · APU Oil System](https://openairdocs.org/jasc/4990)
- Part: Filter
- Part number: 58491661
- Condition: Clogged
- Location: Apu
- Stage of operation: IN
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/XA12003F00000

## Discrepancy

THE INLINE FILTER INSTALLED UNDER SB 21-3485 CLOGS UP.  THERE IS NO TIME INTERVAL TO CLEAN THIS FILTER.  THE SB SIMPLY STATES TO INSTALL THE FILTER, IT DOES NOT MENTION AN INTERVAL TO CLEAN OR REPLACE IT.  THE CLOGGED FILTER CAUSED THE PRESSURIZATION TO GET A 3000 FPM BUMP DURING TAKEOFF CLIMB.

---
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.