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A C172 pilot, while maneuvering near mco, discovered his handheld GPS caused wet compass deviation when placed near it.
| Attributes | |
| ACN | 549028 |
| Time | |
| Date | 200205 |
| Day | Thu |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : orl.airport |
| State Reference | FL |
| Altitude | msl single value : 2500 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : mco.tracon tower : bwi.tower |
| Operator | general aviation : personal |
| Make Model Name | Skyhawk 172/Cutlass 172 |
| Operating Under FAR Part | Part 91 |
| Navigation In Use | other |
| Flight Phase | cruise : level |
| Flight Plan | None |
| Person 1 | |
| Affiliation | other |
| Function | flight crew : single pilot |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 20 flight time total : 1850 flight time type : 200 |
| ASRS Report | 549028 |
| Person 2 | |
| Affiliation | government : faa |
| Function | controller : approach |
| Events | |
| Anomaly | non adherence : clearance other anomaly other other spatial deviation |
| Independent Detector | other controllera other flight crewa |
| Resolutory Action | none taken : detected after the fact |
| Supplementary | |
| Problem Areas | Aircraft Flight Crew Human Performance |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
Placed GPS III pilot on panel near (next to) wet compass and discovered it was causing substantial deviation affecting navigation. Removed from panel and compass returned to normal accurate reading. GPS III pilot placed on panel so as not to lose reception but wound up causing navigation error. Maybe should let users know of potential problem.
Original NASA ASRS Text
Title: A C172 PLT, WHILE MANEUVERING NEAR MCO, DISCOVERED HIS HANDHELD GPS CAUSED WET COMPASS DEV WHEN PLACED NEAR IT.
Narrative: PLACED GPS III PLT ON PANEL NEAR (NEXT TO) WET COMPASS AND DISCOVERED IT WAS CAUSING SUBSTANTIAL DEV AFFECTING NAV. REMOVED FROM PANEL AND COMPASS RETURNED TO NORMAL ACCURATE READING. GPS III PLT PLACED ON PANEL SO AS NOT TO LOSE RECEPTION BUT WOUND UP CAUSING NAV ERROR. MAYBE SHOULD LET USERS KNOW OF POTENTIAL PROB.
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.