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CFI on local instructional flight observes excessive drop on 1 magneto during runup but continues flight anyway.
| Attributes | |
| ACN | 146632 |
| Time | |
| Date | 199005 |
| Day | Tue |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : yng |
| State Reference | OH |
| Altitude | agl bound lower : 0 agl bound upper : 0 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Operator | general aviation : instructional |
| Make Model Name | Small Aircraft, Low Wing, 1 Eng, Fixed Gear |
| Flight Phase | ground : preflight |
| Flight Plan | None |
| Person 1 | |
| Affiliation | Other |
| Function | instruction : instructor |
| Qualification | pilot : cfi pilot : instrument pilot : commercial |
| Experience | flight time last 90 days : 80 flight time total : 1000 flight time type : 35 |
| ASRS Report | 146632 |
| Person 2 | |
| Affiliation | Other |
| Function | flight crew : single pilot instruction : trainee |
| Qualification | pilot : student |
| Events | |
| Anomaly | aircraft equipment problem : critical non adherence : far |
| Independent Detector | other flight crewa |
| Resolutory Action | none taken : anomaly accepted |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
During the runup portion of a VFR instructional flight, the right magneto was found to run roughly. An RPM drop of 300-400' was observed. However, I elected to continue the flight. Although the aircraft used for this flight has a history of idling roughly. The decision to continue after the magnitude of the magnetic drop was not consistent with my normal standards. Upon inspection, the engine was found to be within normal tolerances. Callback conversation with reporter revealed the following: reporter said this was a local instructional flight, one of several he was scheduled to conduct that day. The reason he compromised his standards was both schedule and social pressure. Him employer was eager for him to meet the schedule and he was feeling subtle pressure from that source. A major part of his employer's business consists of flight instruction and promotion of aviation safety. Reporter said this was a 1-TIME occurrence of standards compromise that will not be repeated.
Original NASA ASRS Text
Title: CFI ON LCL INSTRUCTIONAL FLT OBSERVES EXCESSIVE DROP ON 1 MAGNETO DURING RUNUP BUT CONTINUES FLT ANYWAY.
Narrative: DURING THE RUNUP PORTION OF A VFR INSTRUCTIONAL FLT, THE RIGHT MAGNETO WAS FOUND TO RUN ROUGHLY. AN RPM DROP OF 300-400' WAS OBSERVED. HOWEVER, I ELECTED TO CONTINUE THE FLT. ALTHOUGH THE ACFT USED FOR THIS FLT HAS A HISTORY OF IDLING ROUGHLY. THE DECISION TO CONTINUE AFTER THE MAGNITUDE OF THE MAG DROP WAS NOT CONSISTENT WITH MY NORMAL STANDARDS. UPON INSPECTION, THE ENG WAS FOUND TO BE WITHIN NORMAL TOLERANCES. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING: RPTR SAID THIS WAS A LCL INSTRUCTIONAL FLT, ONE OF SEVERAL HE WAS SCHEDULED TO CONDUCT THAT DAY. THE REASON HE COMPROMISED HIS STANDARDS WAS BOTH SCHEDULE AND SOCIAL PRESSURE. HIM EMPLOYER WAS EAGER FOR HIM TO MEET THE SCHEDULE AND HE WAS FEELING SUBTLE PRESSURE FROM THAT SOURCE. A MAJOR PART OF HIS EMPLOYER'S BUSINESS CONSISTS OF FLT INSTRUCTION AND PROMOTION OF AVIATION SAFETY. REPORTER SAID THIS WAS A 1-TIME OCCURRENCE OF STANDARDS COMPROMISE THAT WILL NOT BE REPEATED.
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.