Service difficulty report · Pitot Tube · Boeing 73781Q

Difficulty date
September 29, 2015
Submitted
October 21, 2015
Operation
Air carrier
Aircraft
N520AM
Make and model
Boeing 73781Q
Aircraft serial
29052
Aircraft time
48,084 hours, 17,258 cycles
Part
Pitot Tube
Part number
851AH
Part serial
SS
Condition
Blocked
Location
Left
Part time
448,084 hours, 17,258 cycles
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

AIRCRAFT REJECTED TAKEOFF AT 80 KNOTS DUE TO EICAS MSG IAS DISAGREE & A DIFFERENCE OF 10 KNOTS BETWEEN SPEEDOMETERS BEING BIGGEST LT SIDE. PERFORMED FIM 31-62 TASK 876 PROCEDURE, DETECTING THE LT STATIC PITOT TUBE BLOCKED, SO THE STATIC PITOT TUBE WAS REPLACED IAW AMM 34-11-01. LT PITOT SYS LEAK TEST WAS PERFORMED IAW AMM 34-11-00-00-79-810 811, TESTED CORRECT. THE HIGH ENERGY STOP INSPECTION WAS NOT NECESSARY DUE TO THE MAXIMUM GROSS WEIGHT 67 131 KG AND BRAKES ON SPEED 110 KNOTS WERE NOT EXCEEDED IAW AMM 05-51-07.

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