SDR DALA2019081434760

Service difficulty report · Pitot Tube · Boeing 757251

Difficulty date: August 12, 2019
Submitted: August 14, 2019
Operation: Air carrier
Aircraft: N556NW
Make and model: Boeing 757251
Aircraft serial: 33392
Aircraft time: 48,071 hours, 21,169 cycles
System (JASC): 3411 · Pitot/Static System
Part: Pitot Tube
Condition: Obstructed
Stage of operation: CL
How discovered: O
Nature of condition: C, N
Precautionary procedure: A

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

What was found

SHIP 5656- ATB - DUE TO UNRELIABLE AIRSPEED AFTER T/O CAPT./STBY/FO (AIRSPEED). INVESTIGATION REVEALS WASP/BEE LODGED IN BOTH CAPT. AND FO PITOT PROBES. R/R CAPT. AND FO PITOT PROBES. PURGED AUX 1, FO AND CAPT. PITOT LINES. PERFORMED AOA SENSOR TEST, ALL READINGS GOOD AND SMOOTH DURING MOVEMENT. REPLACED RT ADC AND PERFORMED TEST 30 PITOT STATIC LEAK AND OPS TEST. ALL INDICATIONS NORMAL.