# Airworthiness Directives; Wytwornia Sprzetu Komunikacyjnego (WSK) PZL-Rzeszow S.A. Franklin 6A-350-C1, -C1A, -C1L, -C1R -C2, -C2A, and 4A-235 Series Reciprocating Engines
> **Rule** · Final rule, request for comments. · Published 2003-03-06 · Effective 2003-03-21 · 68 FR 10653
## Document
- **Document number:** 03-5246
- **Category:** airworthiness
- **Type:** Rule
- **Action:** Final rule, request for comments.
- **Citation:** 68 FR 10653
- **Publication date:** 2003-03-06
- **Effective date:** 2003-03-21
- **FAA docket:** Docket No. 2002-NE-20-AD
## Abstract

This amendment supersedes an emergency airworthiness directive (AD) that was sent previously to all known U.S. owners and operators of WSK PZL-Rzeszow S.A. Franklin 6A-350-C1, -C1A, -C1L, -C2, -C2A, and 4A- 235 series reciprocating engines. This action requires removing diaphragm type AC4886 fuel pump, AC part number (P/N) 5656774, PZL P/N 26.11.1710, before further flight, and prohibits installing diaphragm type AC4886 fuel pump, AC P/N 5656774, PZL P/N 26.11.1710. This amendment is prompted by several reports of failures of the valves and diaphragms in certain diaphragm type AC4886 fuel pumps, AC P/N 5656774, PZL P/N 26.11.1710, and adds the 6A-350-C1R engine to the applicability. The actions specified by this AD are intended to prevent reduction or loss of engine power or external fuel leaks.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2003/03/06/03-5246/airworthiness-directives-wytwornia-sprzetu-komunikacyjnego-wsk-pzl-rzeszow-sa-franklin-6a-350-c1)
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