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Small transport pilot distraction by engine problem, experiences an altitude deviation altitude excursion.
| Attributes | |
| ACN | 246440 |
| Time | |
| Date | 199307 |
| Day | Tue |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : fam |
| State Reference | MO |
| Altitude | msl bound lower : 5700 msl bound upper : 6000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Operator | general aviation : instructional |
| Make Model Name | Small Transport, Low Wing, 2 Recip Eng |
| Flight Phase | cruise other |
| Route In Use | enroute airway : zkc |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | Other |
| Function | flight crew : single pilot |
| Qualification | pilot : cfi pilot : atp pilot : instrument |
| Experience | flight time last 90 days : 97 flight time total : 10273 flight time type : 858 |
| ASRS Report | 246440 |
| Person 2 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Qualification | controller : radar |
| Events | |
| Anomaly | aircraft equipment problem : critical altitude deviation : excursion from assigned altitude non adherence : clearance |
| Independent Detector | other controllera other flight crewa |
| Resolutory Action | flight crew : returned to intended course or assigned course none taken : anomaly accepted other |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Aircraft |
| Air Traffic Incident | Pilot Deviation |
Narrative:
While cruising at 6000 ft assigned and approximately 20 mins from destination, the right engine surged and then RPM dropped 300 RPM. I checked all engine instruments and fuel tanks and the only wrong indication was a 300 RPM loss of propeller RPM. I retrimmed the aircraft for the power loss and put it back on automatic pilot. I tried to determine the cause of the problem and a possible correction. I apparently failed to set the altitude hold on the autoplt and was called by ZKC to check my altitude. I had deviated from the assigned altitude and then I explained to center my problem. They wanted to know if I would like a block altitude and I replied this altitude would be okay. I had determined that I could not find the cause and told ZKC that I would proceed to my destination. A landing was made without any difficulty. I had maintenance personnel check the engine.
Original NASA ASRS Text
Title: SMT PLT DISTR BY ENG PROB, EXPERIENCES AN ALTDEV ALT EXCURSION.
Narrative: WHILE CRUISING AT 6000 FT ASSIGNED AND APPROX 20 MINS FROM DEST, THE R ENG SURGED AND THEN RPM DROPPED 300 RPM. I CHKED ALL ENG INSTS AND FUEL TANKS AND THE ONLY WRONG INDICATION WAS A 300 RPM LOSS OF PROP RPM. I RETRIMMED THE ACFT FOR THE PWR LOSS AND PUT IT BACK ON AUTO PLT. I TRIED TO DETERMINE THE CAUSE OF THE PROB AND A POSSIBLE CORRECTION. I APPARENTLY FAILED TO SET THE ALT HOLD ON THE AUTOPLT AND WAS CALLED BY ZKC TO CHK MY ALT. I HAD DEVIATED FROM THE ASSIGNED ALT AND THEN I EXPLAINED TO CTR MY PROB. THEY WANTED TO KNOW IF I WOULD LIKE A BLOCK ALT AND I REPLIED THIS ALT WOULD BE OKAY. I HAD DETERMINED THAT I COULD NOT FIND THE CAUSE AND TOLD ZKC THAT I WOULD PROCEED TO MY DEST. A LNDG WAS MADE WITHOUT ANY DIFFICULTY. I HAD MAINT PERSONNEL CHK THE ENG.
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.