Narrative:

Airlines flight dfw to cle. Dfw WX 900 overcast 3 rain fog cle WX was 3000 overcast . Departed runway 35L dfw. Takeoff and departure were normal. In climb the altimeter appeared to lag and then increase 200' to 300'. Switching frequency normal to alternate static and back to normal seemed to correct the problem. This happened several times in climb. Leveling off at 33000' the altitude hold on the autoplt was selected. The altitude continued to climb. The autoplt was disconnected to manually bring altitude back to 33000'. At this time alternate static was selected. The altimeter started down, airspeed started to increase and the ivsi went to 6000' down. I switched back to normal static, the ivsi came back to 2000' and the airspeed started to decrease. However, the altimeter only came back to 30000'. At this time ATC was advised of our problem. We did not know what altitude we were at and neither did ATC. A block altitude from 29000' to 35000' was issued by ATC. Given this problem I decided to land at the nearest VFR airport. The cle WX was still IFR. Looking at other airports ind WX was scattered to broken clouds. 150 overcast 7 H. A decision was made to land at ind. ATC issued a descent clearance of cruise 3000'. During the descent the altimeter started down at 200' per the ivsi showed only a slight descent. The airspeed started to increase one west past the instrument limit. The mach warning overspd came on and stayed on until the circuit breaker was pulled. A radar vector was provided by ATC to the airport. An overhead approach initiated with a right downwind and landing on runway 5R. After landing the captain's and first officer's altimeter read about 20000', the ivsi showed a descent and the airspeed was above mach 1.0. The cause of this incident was all static ports with the exception of one were taped over. Some of the contributing factors. The aircraft was washed the night before. None of the company procedures were used. Maintenance was never advised that the static parts were going to be taped. A non approved tape was used. The first officer did the walk around in the rain with baggage, loaders, etc around the airplane. The tape was wet when the walk around was made and was very difficult to see.

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Original NASA ASRS Text

Title: ACR MLG MADE TKOF WITH PITOT STATIC PORTS TAPED OVER. EVENTUALLY DIVERTED TO ALTERNATE.

Narrative: AIRLINES FLT DFW TO CLE. DFW WX 900 OVCST 3 RAIN FOG CLE WX WAS 3000 OVCST . DEPARTED RWY 35L DFW. TKOF AND DEP WERE NORMAL. IN CLB THE ALTIMETER APPEARED TO LAG AND THEN INCREASE 200' TO 300'. SWITCHING FREQ NORMAL TO ALTERNATE STATIC AND BACK TO NORMAL SEEMED TO CORRECT THE PROB. THIS HAPPENED SEVERAL TIMES IN CLB. LEVELING OFF AT 33000' THE ALT HOLD ON THE AUTOPLT WAS SELECTED. THE ALT CONTINUED TO CLB. THE AUTOPLT WAS DISCONNECTED TO MANUALLY BRING ALT BACK TO 33000'. AT THIS TIME ALTERNATE STATIC WAS SELECTED. THE ALTIMETER STARTED DOWN, AIRSPD STARTED TO INCREASE AND THE IVSI WENT TO 6000' DOWN. I SWITCHED BACK TO NORMAL STATIC, THE IVSI CAME BACK TO 2000' AND THE AIRSPD STARTED TO DECREASE. HOWEVER, THE ALTIMETER ONLY CAME BACK TO 30000'. AT THIS TIME ATC WAS ADVISED OF OUR PROB. WE DID NOT KNOW WHAT ALT WE WERE AT AND NEITHER DID ATC. A BLOCK ALT FROM 29000' TO 35000' WAS ISSUED BY ATC. GIVEN THIS PROB I DECIDED TO LAND AT THE NEAREST VFR ARPT. THE CLE WX WAS STILL IFR. LOOKING AT OTHER ARPTS IND WX WAS SCATTERED TO BROKEN CLOUDS. 150 OVCST 7 H. A DECISION WAS MADE TO LAND AT IND. ATC ISSUED A DSNT CLRNC OF CRUISE 3000'. DURING THE DSNT THE ALTIMETER STARTED DOWN AT 200' PER THE IVSI SHOWED ONLY A SLIGHT DSNT. THE AIRSPD STARTED TO INCREASE ONE W PAST THE INSTRUMENT LIMIT. THE MACH WARNING OVERSPD CAME ON AND STAYED ON UNTIL THE CB WAS PULLED. A RADAR VECTOR WAS PROVIDED BY ATC TO THE ARPT. AN OVERHEAD APCH INITIATED WITH A R DOWNWIND AND LNDG ON RWY 5R. AFTER LNDG THE CAPT'S AND F/O'S ALTIMETER READ ABOUT 20000', THE IVSI SHOWED A DSNT AND THE AIRSPD WAS ABOVE MACH 1.0. THE CAUSE OF THIS INCIDENT WAS ALL STATIC PORTS WITH THE EXCEPTION OF ONE WERE TAPED OVER. SOME OF THE CONTRIBUTING FACTORS. THE ACFT WAS WASHED THE NIGHT BEFORE. NONE OF THE COMPANY PROCS WERE USED. MAINT WAS NEVER ADVISED THAT THE STATIC PARTS WERE GOING TO BE TAPED. A NON APPROVED TAPE WAS USED. THE F/O DID THE WALK AROUND IN THE RAIN WITH BAGGAGE, LOADERS, ETC AROUND THE AIRPLANE. THE TAPE WAS WET WHEN THE WALK AROUND WAS MADE AND WAS VERY DIFFICULT TO SEE.

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.