Service difficulty report · Pitot System · Cessna 750

Difficulty date
July 23, 2006
Submitted
July 28, 2006
Operation
Air carrier
Aircraft
N923QS
Make and model
Cessna 750
Aircraft serial
7500023
Aircraft time
8,238 hours, 5,202 cycles
Part
Pitot System
Condition
Contaminated
Stage of operation
TO
How discovered
O
Nature of condition
J
Precautionary procedure
C

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

ON TAKEOFF ROLL BETWEEN 60 AND 80 KTS, AMBER "MACH TRIM OFF" AND AMBER "YD OFF LOWER" CAS MESSAGES ILLUMINATED. YD AND M TRIM ANNUNCIATORS ON AUTOPILOT CONTROLLER WENT BLANK. AMBER ARROW APPEARED ON PILOTS PFD AND AP MODES DISAPPEARED. V SPEEDS WERE INTERMITTENTLY DISPLAYED DURING TAXI. PULLED CODES FOUND SEVERAL ADC FAILURES. AIRCRAFT SET OUT IN THE RAIN LAST NIGHT. PURGED STATIC AND PITOT LINES. PERFORMED ALTITUDE CORRELATION AND LEAK CHECKS IAW CE 750 MM 34-11-01 AND FAR 91.411 FAR 43 APPENDIX E OPS CHECKS GOOD.

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