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Illogical IAS readings inflight for a C402 pilot dictated a need to land as soon as possible at his destination.
| Attributes | |
| ACN | 871635 |
| Time | |
| Date | 201002 |
| Local Time Of Day | 1201-1800 |
| Place | |
| Locale Reference | ZZZ.Airport |
| State Reference | US |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Make Model Name | Cessna 402/402C/B379 Businessliner/Utiliner |
| Operating Under FAR Part | Part 135 |
| Flight Phase | Initial Approach |
| Route In Use | Visual Approach |
| Flight Plan | IFR |
| Component | |
| Aircraft Component | Airspeed Indicator |
| Person 1 | |
| Function | Captain |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Experience | Flight Crew Last 90 Days 137 Flight Crew Total 8225 Flight Crew Type 1374 |
| Events | |
| Anomaly | Aircraft Equipment Problem Critical |
Narrative:
On descent to airport; having been cleared for a visual approach; the airspeed decreased significantly from 140 KTS to 85 KTS indicated. Application of full power was made and no increase in airspeed was obtained. All ice protection was on and no external surface icing was observed. I opted to remain VMC; not return to IMC conditions with a faulty airspeed indicator; and land the aircraft after an overhead joining pattern during which; the aircraft was unable to increase indicated airspeed despite max power. The only available runway to remain VMC was runway 07 with a tailwind of 240/7 KTS last known.
Original NASA ASRS Text
Title: Illogical IAS readings inflight for a C402 pilot dictated a need to land ASAP at his destination.
Narrative: On descent to airport; having been cleared for a visual approach; the airspeed decreased significantly from 140 KTS to 85 KTS indicated. Application of full power was made and no increase in airspeed was obtained. All ice protection was on and no external surface icing was observed. I opted to remain VMC; not return to IMC conditions with a faulty airspeed indicator; and land the aircraft after an overhead joining pattern during which; the aircraft was unable to increase indicated airspeed despite max power. The only available runway to remain VMC was Runway 07 with a tailwind of 240/7 KTS last known.
Data retrieved from NASA's ASRS site as of April 2012 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.