Pilot of an small aircraft made forced landing after losing engine power.

Attributes
ACN	316032
Time
Date	199509
Day	Sun
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : hnw airport : pvf
State Reference	CA
Altitude	msl bound lower : 9000 msl bound upper : 9000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : mcc
Operator	general aviation : personal
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Operating Under FAR Part	Part 91
Flight Phase	cruise other
Route In Use	enroute : direct enroute airway : zoa
Flight Plan	IFR
Person 1
Affiliation	Other
Function	flight crew : single pilot
Qualification	pilot : private pilot : instrument
Experience	flight time last 90 days : 61 flight time total : 1517 flight time type : 1100
ASRS Report	316032
Person 2
Affiliation	government : faa
Function	controller : approach
Qualification	controller : radar
Events
Anomaly	aircraft equipment problem : critical other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified other flight crewa
Resolutory Action	other other
Consequence	Other
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	other

Narrative:

Having leveled off at 9000 ft MSL, after descending from 13000 ft from squaw valley VOR, my engine made a loud pop followed by a loss of manifold pressure and loss of power. The engine sounded like it ingested a valve. I declared an emergency and proceeded to the nearest airport in VFR conditions. The landing at pvf airport was normal. No injuries or damage to aircraft. Inspection of engine revealed #1 cylinder exhaust pipe was sheared at flange.

Original NASA ASRS Text

Title: PLT OF AN SMA MADE FORCED LNDG AFTER LOSING ENG PWR.

Narrative: HAVING LEVELED OFF AT 9000 FT MSL, AFTER DSNDING FROM 13000 FT FROM SQUAW VALLEY VOR, MY ENG MADE A LOUD POP FOLLOWED BY A LOSS OF MANIFOLD PRESSURE AND LOSS OF PWR. THE ENG SOUNDED LIKE IT INGESTED A VALVE. I DECLARED AN EMER AND PROCEEDED TO THE NEAREST ARPT IN VFR CONDITIONS. THE LNDG AT PVF ARPT WAS NORMAL. NO INJURIES OR DAMAGE TO ACFT. INSPECTION OF ENG REVEALED #1 CYLINDER EXHAUST PIPE WAS SHEARED AT FLANGE.

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.