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Pilot of commander 112 has engine roughness with partial power loss. Precautionary landing at nearby airport executed.
| Attributes | |
| ACN | 382256 |
| Time | |
| Date | 199710 |
| Day | Sat |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | atc facility : ehf |
| State Reference | CA |
| Altitude | msl bound lower : 5500 msl bound upper : 5500 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : fat |
| Operator | general aviation : personal |
| Make Model Name | Aero Commander 112 |
| Operating Under FAR Part | Part 91 |
| Flight Phase | cruise other |
| Flight Plan | None |
| Person 1 | |
| Affiliation | Other |
| Function | flight crew : single pilot |
| Qualification | pilot : instrument pilot : private |
| Experience | flight time last 90 days : 15 flight time total : 306 flight time type : 46 |
| ASRS Report | 382256 |
| 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 | flight crew : declared emergency other |
| Consequence | Other Other |
| Supplementary | |
| Primary Problem | Aircraft |
Narrative:
Precautionary landing due to partial power loss and engine roughness. The condition started suddenly while in cruise at 5500 ft MSL. Performed emergency checklist items which did not improve the engine condition. When the mixture was richened, the engine lost full power. Partial power was restored when leaned back to cruise setting. The other checklist items did not restore the initial power loss. I then diverted to a nearby airport where a safe landing was made. Subsequently, the FBO determined that a fuel injector was plugged. As a further note, the approach to landing was unusually steep due to non standard power settings. The high approach ended with a normal touchdown near or just past midfield. I was tempted to initiate a go around but landed because of the obvious engine problems and safe looking overrun area past the runway. I normally do not land that far down a runway, so the perception was that I would overrun it. Nevertheless, upon touchdown, I applied prompt braking and stopped easily without excessive braking.
Original NASA ASRS Text
Title: PLT OF COMMANDER 112 HAS ENG ROUGHNESS WITH PARTIAL PWR LOSS. PRECAUTIONARY LNDG AT NEARBY ARPT EXECUTED.
Narrative: PRECAUTIONARY LNDG DUE TO PARTIAL PWR LOSS AND ENG ROUGHNESS. THE CONDITION STARTED SUDDENLY WHILE IN CRUISE AT 5500 FT MSL. PERFORMED EMER CHKLIST ITEMS WHICH DID NOT IMPROVE THE ENG CONDITION. WHEN THE MIXTURE WAS RICHENED, THE ENG LOST FULL PWR. PARTIAL PWR WAS RESTORED WHEN LEANED BACK TO CRUISE SETTING. THE OTHER CHKLIST ITEMS DID NOT RESTORE THE INITIAL PWR LOSS. I THEN DIVERTED TO A NEARBY ARPT WHERE A SAFE LNDG WAS MADE. SUBSEQUENTLY, THE FBO DETERMINED THAT A FUEL INJECTOR WAS PLUGGED. AS A FURTHER NOTE, THE APCH TO LNDG WAS UNUSUALLY STEEP DUE TO NON STANDARD PWR SETTINGS. THE HIGH APCH ENDED WITH A NORMAL TOUCHDOWN NEAR OR JUST PAST MIDFIELD. I WAS TEMPTED TO INITIATE A GAR BUT LANDED BECAUSE OF THE OBVIOUS ENG PROBS AND SAFE LOOKING OVERRUN AREA PAST THE RWY. I NORMALLY DO NOT LAND THAT FAR DOWN A RWY, SO THE PERCEPTION WAS THAT I WOULD OVERRUN IT. NEVERTHELESS, UPON TOUCHDOWN, I APPLIED PROMPT BRAKING AND STOPPED EASILY WITHOUT EXCESSIVE BRAKING.
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.