An aircraft equipment problem leads to another.

Attributes
ACN	294022
Time
Date	199501
Day	Thu
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : ok03 airport : ok33
State Reference	OK
Altitude	agl bound lower : 0 agl bound upper : 0
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	general aviation : personal
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Operating Under FAR Part	Part 91
Flight Phase	cruise other other other
Flight Plan	None
Person 1
Affiliation	Other
Function	flight crew : single pilot
Qualification	pilot : instrument pilot : commercial
Experience	flight time last 90 days : 60 flight time total : 4800 flight time type : 300
ASRS Report	294022
Events
Anomaly	aircraft equipment problem : critical other anomaly other
Independent Detector	other flight crewa
Resolutory Action	flight crew : declared emergency none taken : unable none taken : detected after the fact other
Consequence	other
Supplementary
Primary Problem	Aircraft

Narrative:

En route from tulsa riverside airport to grove, ok, airport near the town of ketchum, ok, I started getting fluctuations in manifold pressure not correlating with throttle movement and surges in power. I picked the nearest landing field for a precautionary landing to have the aircraft checked. On landing rollout, the gear failed with a down indication. No unsafe gear horn sounded. The owner of the aircraft had had a gear up landing in the same aircraft 6 months prior. Suspect that gear was not adjusted properly. Manifold pressure may have been reflecting a faulty wastegate controller on the turbocharger.

Original NASA ASRS Text

Title: AN ACFT EQUIP PROB LEADS TO ANOTHER.

Narrative: ENRTE FROM TULSA RIVERSIDE ARPT TO GROVE, OK, ARPT NEAR THE TOWN OF KETCHUM, OK, I STARTED GETTING FLUCTUATIONS IN MANIFOLD PRESSURE NOT CORRELATING WITH THROTTLE MOVEMENT AND SURGES IN PWR. I PICKED THE NEAREST LNDG FIELD FOR A PRECAUTIONARY LNDG TO HAVE THE ACFT CHKED. ON LNDG ROLLOUT, THE GEAR FAILED WITH A DOWN INDICATION. NO UNSAFE GEAR HORN SOUNDED. THE OWNER OF THE ACFT HAD HAD A GEAR UP LNDG IN THE SAME ACFT 6 MONTHS PRIOR. SUSPECT THAT GEAR WAS NOT ADJUSTED PROPERLY. MANIFOLD PRESSURE MAY HAVE BEEN REFLECTING A FAULTY WASTEGATE CTLR ON THE TURBOCHARGER.

Data retrieved from NASA's ASRS site as of July 2007 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.