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A cessna 150 pilot reports water and ice entering the static port when parked outside. Port appears clear but in flight have abnormal altimeter, rate of climb and airspeed.
| Attributes | |
| ACN | 602013 |
| Time | |
| Date | 200312 |
| Day | Tue |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : zzz.airport |
| State Reference | US |
| Altitude | agl single value : 0 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Operator | general aviation : personal |
| Make Model Name | Cessna 150 |
| Flight Phase | ground : parked |
| Person 1 | |
| Affiliation | other |
| Qualification | pilot : commercial |
| Experience | flight time last 90 days : 10.5 flight time total : 3187.5 flight time type : 3070.7 |
| ASRS Report | 602013 |
| Events | |
| Anomaly | aircraft equipment problem : critical inflight encounter : weather inflight encounter other |
| Independent Detector | aircraft equipment other aircraft equipment : abnormal a/s, alt & rate of climb other other : person 1 |
| Resolutory Action | none taken : detected after the fact |
| Consequence | other |
| Factors | |
| Maintenance | contributing factor : weather performance deficiency : inspection |
| Supplementary | |
| Problem Areas | Weather Aircraft Environmental Factor |
| Primary Problem | Aircraft |
Narrative:
On several occasions throughout the years, water and ice have entered the static port of my cessna 150 while parked outside. This resulted in abnormal operation of altimeter, rate of climb and airspeed. The offending moisture was not visible in the static port at pre-flight inspection. I suggest using a static port cover. A simple cover of folded tape might provide some protection: use bright red tape and remove tape before flight! Callback conversation with reporter revealed the following information: the reporter stated the manufacturer never installed any device to drain the static line of moisture. The reporter said an after market sump and drain plug was installed, but had been ineffective. The reporter stated the airplane was delivered with one static port and was not heated.
Original NASA ASRS Text
Title: A CESSNA 150 PLT RPTS WATER AND ICE ENTERING THE STATIC PORT WHEN PARKED OUTSIDE. PORT APPEARS CLR BUT IN FLT HAVE ABNORMAL ALTIMETER, RATE OF CLIMB AND AIRSPEED.
Narrative: ON SEVERAL OCCASIONS THROUGHOUT THE YEARS, WATER AND ICE HAVE ENTERED THE STATIC PORT OF MY CESSNA 150 WHILE PARKED OUTSIDE. THIS RESULTED IN ABNORMAL OP OF ALTIMETER, RATE OF CLIMB AND AIRSPEED. THE OFFENDING MOISTURE WAS NOT VISIBLE IN THE STATIC PORT AT PRE-FLT INSPECTION. I SUGGEST USING A STATIC PORT COVER. A SIMPLE COVER OF FOLDED TAPE MIGHT PROVIDE SOME PROTECTION: USE BRIGHT RED TAPE AND REMOVE TAPE BEFORE FLT! CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: THE RPTR STATED THE MANUFACTURER NEVER INSTALLED ANY DEVICE TO DRAIN THE STATIC LINE OF MOISTURE. THE RPTR SAID AN AFTER MARKET SUMP AND DRAIN PLUG WAS INSTALLED, BUT HAD BEEN INEFFECTIVE. THE RPTR STATED THE AIRPLANE WAS DELIVERED WITH ONE STATIC PORT AND WAS NOT HEATED.
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.