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A C150 VFR single pilot experienced engine roughness and wanted to maintain a sufficient altitude to allow him to glide to slc, if necessary, which caused him to decline S56's instruction to descend to a lower altitude.
| Attributes | |
| ACN | 629947 |
| Time | |
| Date | 200408 |
| Day | Fri |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | airport : tvy.airport |
| State Reference | UT |
| Altitude | msl bound lower : 7500 msl bound upper : 8500 |
| Environment | |
| Flight Conditions | VMC |
| Light | Night |
| Aircraft 1 | |
| Controlling Facilities | tracon : s56.tracon |
| Operator | general aviation : personal |
| Make Model Name | Cessna 150 |
| Operating Under FAR Part | Part 91 |
| Flight Phase | cruise : level |
| Flight Plan | None |
| Person 1 | |
| Affiliation | other |
| Function | flight crew : single pilot |
| Qualification | pilot : instrument pilot : commercial |
| Experience | flight time last 90 days : 42 flight time total : 950 flight time type : 550 |
| ASRS Report | 629947 |
| Person 2 | |
| Affiliation | government : faa |
| Function | controller : approach |
| Events | |
| Anomaly | aircraft equipment problem : critical non adherence : published procedure non adherence : far |
| Independent Detector | other flight crewa |
| Resolutory Action | flight crew : overcame equipment problem flight crew : diverted to another airport |
| Supplementary | |
| Problem Areas | Flight Crew Human Performance Aircraft |
| Primary Problem | Aircraft |
Narrative:
Returning from wendover to slc, experienced engine roughness, then engine started missing. Began climbing and expecting possible engine failure, headed for tooele airport, climbing to 8500 ft MSL. Used 123.0 to activate runway lighting at tvy, then noticed that engine smoothed out at full rich, full power at 8500 ft. Thereafter, decided to try for slc. Declined controller's instruction to descend to 6000 ft as a precaution and remained at that altitude until runway at slc was sure.
Original NASA ASRS Text
Title: A C150 VFR SINGLE PLT EXPERIENCED ENG ROUGHNESS AND WANTED TO MAINTAIN A SUFFICIENT ALT TO ALLOW HIM TO GLIDE TO SLC, IF NECESSARY, WHICH CAUSED HIM TO DECLINE S56'S INSTRUCTION TO DSND TO A LOWER ALT.
Narrative: RETURNING FROM WENDOVER TO SLC, EXPERIENCED ENG ROUGHNESS, THEN ENG STARTED MISSING. BEGAN CLBING AND EXPECTING POSSIBLE ENG FAILURE, HEADED FOR TOOELE ARPT, CLBING TO 8500 FT MSL. USED 123.0 TO ACTIVATE RWY LIGHTING AT TVY, THEN NOTICED THAT ENG SMOOTHED OUT AT FULL RICH, FULL PWR AT 8500 FT. THEREAFTER, DECIDED TO TRY FOR SLC. DECLINED CTLR'S INSTRUCTION TO DSND TO 6000 FT AS A PRECAUTION AND REMAINED AT THAT ALT UNTIL RWY AT SLC WAS SURE.
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.