Off airport emergency landing in small transport twin.

Attributes
ACN	309853
Time
Date	199507
Day	Mon
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : cxy
State Reference	PA
Altitude	agl bound lower : 0 agl bound upper : 5000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : mdt
Operator	general aviation : personal
Make Model Name	Super Skymaster
Operating Under FAR Part	Part 91
Flight Phase	descent other landing other other
Flight Plan	None
Person 1
Affiliation	Other
Function	flight crew : single pilot
Qualification	pilot : commercial
Experience	flight time last 90 days : 25 flight time total : 3000 flight time type : 500
ASRS Report	309853
Person 2
Affiliation	government : faa
Function	controller : approach
Qualification	controller : radar
Events
Anomaly	aircraft equipment problem : critical
Independent Detector	other flight crewa
Resolutory Action	flight crew : declared emergency none taken : unable other
Consequence	other Other
Supplementary
Primary Problem	Aircraft

Narrative:

While descending in reduced power spiral from 11000 ft MSL to approximately 5000 ft MSL, unknown circumstances developed which prevented both engines on my cessna 337 skymaster from developing power. Restart attempted for both engines, without success. Had ample fuel on board, no prior indication of problems. Made power-off approach toward capital city airport but when I saw I could not reach the airport, I decided to leave the gear up and make a water landing. Landing was successful, no injury to myself or damage to plane (other than effect of being in water). I had been on my way to canada to have the annual inspection performed. Aircraft is registered in canada. Possible cause of dual engine failure could have been vapor lock or flooding of engines.

Original NASA ASRS Text

Title: OFF ARPT EMER LNDG IN SMT TWIN.

Narrative: WHILE DSNDING IN REDUCED PWR SPIRAL FROM 11000 FT MSL TO APPROX 5000 FT MSL, UNKNOWN CIRCUMSTANCES DEVELOPED WHICH PREVENTED BOTH ENGS ON MY CESSNA 337 SKYMASTER FROM DEVELOPING PWR. RESTART ATTEMPTED FOR BOTH ENGS, WITHOUT SUCCESS. HAD AMPLE FUEL ON BOARD, NO PRIOR INDICATION OF PROBS. MADE PWR-OFF APCH TOWARD CAPITAL CITY ARPT BUT WHEN I SAW I COULD NOT REACH THE ARPT, I DECIDED TO LEAVE THE GEAR UP AND MAKE A WATER LNDG. LNDG WAS SUCCESSFUL, NO INJURY TO MYSELF OR DAMAGE TO PLANE (OTHER THAN EFFECT OF BEING IN WATER). I HAD BEEN ON MY WAY TO CANADA TO HAVE THE ANNUAL INSPECTION PERFORMED. ACFT IS REGISTERED IN CANADA. POSSIBLE CAUSE OF DUAL ENG FAILURE COULD HAVE BEEN VAPOR LOCK OR FLOODING OF ENGS.

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.