PA28 ENG FAIL ZFW.

Narrative

ON FEB/WED/99; I REFUELED MY ACFT; A PA28-201T; AT SHAWNEE; OK; (SNL). BOTH TANKS WERE FILLED. I DEPARTED SNL FOR HOUSTON SOUTHWEST ARPT (AXH). 5 MI S OF SNL; I CONTACTED ZFW BY RADIO; WAS ADVISED I WAS IN RADAR CONTACT; AND WAS ISSUED MY IFR CLRNC. I CLBED TO 7000 FT MSL. APPROX 35 NM S OF CQY; I WAS INSTRUCTED BY ZFW TO DSND AND MAINTAIN 6000 FT. I HAD PREVIOUSLY BEEN ADVISED OF VFR TFC AT MY 5 O'CLOCK POS; AT AN UNVERIFIED ALT OF 7000-7500 FT; THAT WAS OVERTAKING ME. I COMMENCED MY DSCNT; AND WAS ALSO INSTRUCTED TO SWITCH FROM MY CURRENT FREQ OF 135.25 TO CONTACT ZHU ON 134.8. PRIOR TO ESTABLISHING CONTACT WITH ZHU; ABOUT 38 NM S OF CQY; AN ALT OF BTWN 7000 FT TO 6000 FT; THE ACFT ENG BEGAN TO LOOSE PWR; WITH MANIFOLD PRESSURE DROPPING FROM 34.8 INCHES TO 25 INCHES. I IMMEDIATELY TURNED TOWARDS THE TEAGUE; TEXAS ARPT (68F); WHICH WAS ABOUT 11 MI DOWNWIND AT AN APPROX HDG OF 315 DEGS. I THEN REESTABLISHED CONTACT WITH ZFW ON FREQ 135.25. THE CTLR ASKED IF I HAD BEEN UNABLE TO CONTACT ZHU; AND I RESPONDED THAT I HAD A ROUGH RUNNING ENG AND WAS IMMEDIATELY DIVERTING TO THE TEAGUE ARPT. UPON VERIFYING THAT I HAD THE TEAGUE ARPT IN SIGHT; THE CTLR ISSUED ME A VISUAL APCH CLRNC AND PROVIDED ME WITH THE ELEVATION AND RWY ORIENTATION FOR TEAGUE. WHEN I WASN'T ABLE TO OBTAIN CRUISE PWR AFTER SWITCHING FUEL TANKS AND AFTER SETTING THE MIXTURE TO FULL RICH; THROTTLE AT MAX PWR POS; AND PROP AT MAX RPM SETTING; I ADVISED THE CTLR TO CONSIDER MY SIT AN EMER SIT. THE CTLR ASKED ME TO RELAY MY SIT UPON LNDG TO ANY OTHER ACFT ON THE FREQ AND APPROVED A CHANGE TO THE TEAGUE ADVISORY FREQ OF 122.9. UPON A SUCCESSFUL LNDG AND TAXI TO THE RAMP AT TEAGUE; I ESTABLISHED RADIO CONTACT WITH ANOTHER ACFT ON THE FREQ; WHOSE IDENT I DID NOT RECORD. THE OTHER ACFT RELAYED TO THE CTR CTLR THAT I HAD SUCCESSFULLY MADE A PRECAUTIONARY LNDG SAFELY. THE HANDLING OF MY SIT BY ATC WAS ALL ANYONE COULD HAVE EXPECTED; WAS PROFESSIONAL AND EXCEPTIONAL. REPLACED THE #3 CYLINDER ON JUL/XX/98; WITHIN THE TIME FRAME SPECIFIED BY AD98-19-02. ON FEB/WED/99; AN INSPECTION OF THE ACFT REVEALED THAT AN EXHAUST VALVE ON THE #5 CYLINDER HAD SHATTERED; DAMAGING THE CYLINDER AND PISTON; AND PASSING VALVE FRAGMENTS THROUGH AND DAMAGING THE TURBOCHARGER.