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Small aircraft has rough engine. Pilot obtains flight assist to nearest suitable airport and performs a precautionary landing.
| Attributes | |
| ACN | 206294 |
| Time | |
| Date | 199203 |
| Day | Tue |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | airport : mlb |
| State Reference | FL |
| Altitude | msl bound lower : 1500 msl bound upper : 2000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Night |
| Aircraft 1 | |
| Controlling Facilities | tracon : cof |
| Operator | general aviation : personal |
| Make Model Name | Small Aircraft, Low Wing, 1 Eng, Retractable Gear |
| Flight Phase | descent other |
| Route In Use | enroute : direct |
| Flight Plan | VFR |
| Person 1 | |
| Affiliation | Other |
| Function | flight crew : single pilot |
| Qualification | pilot : commercial pilot : instrument |
| Experience | flight time last 90 days : 100 flight time total : 1500 flight time type : 12 |
| ASRS Report | 206294 |
| Person 2 | |
| Affiliation | government : faa |
| Function | controller : approach |
| Qualification | controller : radar |
| Events | |
| Anomaly | aircraft equipment problem : critical other anomaly other |
| Independent Detector | other flight crewa |
| Resolutory Action | flight crew : declared emergency flight crew : overcame equipment problem |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Aircraft |
| Air Traffic Incident | other |
Narrative:
Upon initiating gear extension, engine operation became very rough, intermittent. After completing emergency procedures, advised ATC of problem, requested nearest field. Engine continued to operate at 2000 RPM and became smooth. ATC advised merritt field as close. I executed emergency approach and landing safely. I do not remember declaring an 'emergency' as events and landing were so rapid. However, ATC did not contact me visibility a visibility 'priority handling.' I am concerned that an far violation might be forthcoming due to virtual emergency operation and no report to FAA. Aircraft engine fuel system examined on ground. Engine ok at high power run up. Small quantity of water in right wing sump, approximately 1 cc. Aircraft engine vacuum pump failed simultaneously to engine problem standby vacuum was selected. Inspection of vacuum pump revealed internal rotor failure. Drive shaft coupling intact.
Original NASA ASRS Text
Title: SMA HAS ROUGH ENG. PLT OBTAINS FLT ASSIST TO NEAREST SUITABLE ARPT AND PERFORMS A PRECAUTIONARY LNDG.
Narrative: UPON INITIATING GEAR EXTENSION, ENG OP BECAME VERY ROUGH, INTERMITTENT. AFTER COMPLETING EMER PROCS, ADVISED ATC OF PROBLEM, REQUESTED NEAREST FIELD. ENG CONTINUED TO OPERATE AT 2000 RPM AND BECAME SMOOTH. ATC ADVISED MERRITT FIELD AS CLOSE. I EXECUTED EMER APCH AND LNDG SAFELY. I DO NOT REMEMBER DECLARING AN 'EMER' AS EVENTS AND LNDG WERE SO RAPID. HOWEVER, ATC DID NOT CONTACT ME VIS A VIS 'PRIORITY HANDLING.' I AM CONCERNED THAT AN FAR VIOLATION MIGHT BE FORTHCOMING DUE TO VIRTUAL EMER OP AND NO RPT TO FAA. ACFT ENG FUEL SYS EXAMINED ON GND. ENG OK AT HIGH PWR RUN UP. SMALL QUANTITY OF WATER IN R WING SUMP, APPROX 1 CC. ACFT ENG VACUUM PUMP FAILED SIMULTANEOUSLY TO ENG PROBLEM STANDBY VACUUM WAS SELECTED. INSPECTION OF VACUUM PUMP REVEALED INTERNAL ROTOR FAILURE. DRIVE SHAFT COUPLING INTACT.
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.