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GA small aircraft deviated from published heading during IAP NDB approach. While correcting heading altitude deviation excursion from clearance altitude.
| Attributes | |
| ACN | 97802 |
| Time | |
| Date | 198811 |
| Day | Sat |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : cmh |
| State Reference | OH |
| Altitude | msl bound lower : 2700 msl bound upper : 3000 |
| Environment | |
| Flight Conditions | IMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : cmh |
| Operator | general aviation : personal |
| Make Model Name | Small Transport |
| Flight Phase | descent : approach |
| Route In Use | enroute : on vectors |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | Other |
| Function | flight crew : single pilot |
| Qualification | pilot : private pilot : instrument |
| Experience | flight time last 90 days : 22 flight time total : 871 flight time type : 47 |
| ASRS Report | 97802 |
| Person 2 | |
| Affiliation | government : faa |
| Function | controller : approach |
| Qualification | controller : radar |
| Events | |
| Anomaly | aircraft equipment problem : less severe altitude deviation : excursion from assigned altitude non adherence : published procedure other spatial deviation |
| Independent Detector | other controllera other flight crewa |
| Resolutory Action | flight crew : returned to intended course or assigned course other |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
On executing 360 degree vector to osm NDB, aircraft compass system failed and indicated 80-90 degrees off causing temporary +/-275 degree heading which was corrected upon verifying with glare shield compass. Dg was set to correct heading and stayed accurate for duration of flight. Cause unknown. Pilot performance was affected by the following: during cruise near flm, right engine lost 50% power, corrected by switching fuel tanks. Results: pilot became somewhat anxious. Compass problem furthered the anxiety. Controller took charge and vectored pilot through the approach with added questions including: 'training flight?' answer, 'negative.' 'mode C readout--2700 assigned 3000?' altimeter setting was correct and indicated 3000. Radio shop to check system. 'When are you going to begin descent to MDA?' answered, 'that descent was commencing.' pilot being anxious about right engine performance delayed descent as a safety precaution which worked out fine in locating airport. Solution: due to pilot becoming anxious, he permitted his performance to become less than satisfactory. The question as to altitude furthered the anxiety and pilot corrected by climbing 300'. The chkout of the mode C is not complete but it is the pilot's feeling that it was correct as indicated at 3000'. The combination of engine power loss, compass problem and mode C furthered pilot's unsatisfactory performance. Although pilot had the craft under control and completed the approach satisfactorily, he permitted a series of events to somewhat control him, rather than the pilot controling his reactions. Corrective action included the following: 1) shop to analyze engine power loss, mode C and compass system. 2) pilot to immediately take additional training in 'emergency sits,' ie, engine out, partial panel, fuel system failure along with concentrated training on all approachs. Specifically non precision approachs. 3) increase frequency of flying to assure familiarity of the aircraft and pilot proficiency.
Original NASA ASRS Text
Title: GA SMA DEVIATED FROM PUBLISHED HEADING DURING IAP NDB APCH. WHILE CORRECTING HEADING ALT DEVIATION EXCURSION FROM CLRNC ALT.
Narrative: ON EXECUTING 360 DEG VECTOR TO OSM NDB, ACFT COMPASS SYS FAILED AND INDICATED 80-90 DEGS OFF CAUSING TEMPORARY +/-275 DEG HDG WHICH WAS CORRECTED UPON VERIFYING WITH GLARE SHIELD COMPASS. DG WAS SET TO CORRECT HDG AND STAYED ACCURATE FOR DURATION OF FLT. CAUSE UNKNOWN. PLT PERFORMANCE WAS AFFECTED BY THE FOLLOWING: DURING CRUISE NEAR FLM, RIGHT ENG LOST 50% PWR, CORRECTED BY SWITCHING FUEL TANKS. RESULTS: PLT BECAME SOMEWHAT ANXIOUS. COMPASS PROB FURTHERED THE ANXIETY. CTLR TOOK CHARGE AND VECTORED PLT THROUGH THE APCH WITH ADDED QUESTIONS INCLUDING: 'TRNING FLT?' ANSWER, 'NEGATIVE.' 'MODE C READOUT--2700 ASSIGNED 3000?' ALTIMETER SETTING WAS CORRECT AND INDICATED 3000. RADIO SHOP TO CHK SYS. 'WHEN ARE YOU GOING TO BEGIN DSCNT TO MDA?' ANSWERED, 'THAT DSCNT WAS COMMENCING.' PLT BEING ANXIOUS ABOUT RIGHT ENG PERFORMANCE DELAYED DSCNT AS A SAFETY PRECAUTION WHICH WORKED OUT FINE IN LOCATING ARPT. SOLUTION: DUE TO PLT BECOMING ANXIOUS, HE PERMITTED HIS PERFORMANCE TO BECOME LESS THAN SATISFACTORY. THE QUESTION AS TO ALT FURTHERED THE ANXIETY AND PLT CORRECTED BY CLBING 300'. THE CHKOUT OF THE MODE C IS NOT COMPLETE BUT IT IS THE PLT'S FEELING THAT IT WAS CORRECT AS INDICATED AT 3000'. THE COMBINATION OF ENG PWR LOSS, COMPASS PROB AND MODE C FURTHERED PLT'S UNSATISFACTORY PERFORMANCE. ALTHOUGH PLT HAD THE CRAFT UNDER CONTROL AND COMPLETED THE APCH SATISFACTORILY, HE PERMITTED A SERIES OF EVENTS TO SOMEWHAT CONTROL HIM, RATHER THAN THE PLT CTLING HIS REACTIONS. CORRECTIVE ACTION INCLUDED THE FOLLOWING: 1) SHOP TO ANALYZE ENG PWR LOSS, MODE C AND COMPASS SYS. 2) PLT TO IMMEDIATELY TAKE ADDITIONAL TRNING IN 'EMER SITS,' IE, ENG OUT, PARTIAL PANEL, FUEL SYS FAILURE ALONG WITH CONCENTRATED TRNING ON ALL APCHS. SPECIFICALLY NON PRECISION APCHS. 3) INCREASE FREQ OF FLYING TO ASSURE FAMILIARITY OF THE ACFT AND PLT PROFICIENCY.
Data retrieved from NASA's ASRS site as of August 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.