# SDR 99ZZZX3155

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 19, 1999
- Submitted: March 26, 2000
- Operation: General aviation
- Aircraft: [N432ER](https://openairdocs.org/aircraft/N432ER), registered now
- Make and model: Cessna 172R
- Registry model: [Cessna 172R](https://openairdocs.org/model/cessna-172r) (OpenAirDocs)
- Aircraft serial: 17280652
- System (JASC): [2822 · Fuel Boost Pump](https://openairdocs.org/jasc/2822)
- Part: Boost Pump
- Part number: 5100001
- Condition: Making Metal
- Location: Fuel System
- Part time: 933 hours
- Stage of operation: IN
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/99ZZZX3155

## Discrepancy

RECENTLY, THE AIRCRAFT AND ENGINE MANUFACTURERS HAVE ISSUED A PROCEDURE CHANGE REQUIRING THE BOOST PUMP REMAIN FOR TAKEOFF AND LANDING.  SINCE THE INCORPORATION OF THIS PROCEDURE, THIS FLEET OF 172R'S HAS BEGUN TO HAVE VERY SMALL BRASS-LIKE PARTICLES ACCUMULATE IN THE FUEL STRAINER.  INITIAL REPORTS ON THE PARTICULAR SIZE INDICATE THAT SOME OF THE PARTICLES ARE SMALLER THAN THE GASCOLATOR FILTER AND THE INLET SCREEN TO THE FUEL SERVO, POSSIBLY AS SMALL AS 15 MICRON.  WHEN THESE PUMPS FAIL, THE SERVO AND THE FUEL MANIFOLD ARE REPLACED AND THE SYSTEM IS FLUSHED.

---
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.