SDR DALA2019052203138

Service difficulty report · Sensor · Boeing 757351

Difficulty date: May 20, 2019
Submitted: May 23, 2019
Operation: Air carrier
Aircraft: N591NW
Make and model: Boeing 757351
Aircraft serial: 32991
Aircraft time: 57,221 hours, 18,884 cycles
Engine: Pwa PW2040
Engine time: 46,827 hours, 17,952 cycles
System (JASC): 3620 · Pneumatic Indicating System
Part: Sensor
Condition: Defective
Location: Bleed Air Sys
Stage of operation: IN
How discovered: O
Nature of condition: 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 5811 -DIV- DIVERED TO DEN DUE TO LEFT ENGINE BLEED OFF LIGHT AND EICAS MESSAGE AT FL 360 AND ENGINE ANTI-ICE ON. FOLLOWED QRH AND RECEIVED RIGHT ENGINE BLEED OFF LIGHT AND EICAS MESSAGE. DESCENDED OUT OF VISIBLE MOISTURE AND RESET ENGINE BLEED AND SAME CONDITION RETURNED ENTERED VISIBLE MOISTURE AGAIN AT FL280. CORRECTIVE ACTION: REPLACED LEFT ENGINE HIGH STAGE PILOT, FAMVAND LEFT ENGINE FAN AIR TEMP SENSOR. PERFORMED OPERATIONAL PNEUMATIC TEST PER FIM OP TESTS GOOD. LP 5646792