SDR DALA2019100435718

Service difficulty report · Sensor · Boeing 757351

Difficulty date: October 3, 2019
Submitted: October 4, 2019
Operation: Air carrier
Aircraft: N590NW
Make and model: Boeing 757351
Aircraft serial: 32990
Aircraft time: 59,463 hours, 19,307 cycles
System (JASC): 3620 · Pneumatic Indicating System
Part: Sensor
Condition: Malfunctioned
Location: Lt Engine Bleed
Stage of operation: CR
How discovered: O
Nature of condition: J
Precautionary procedure: B

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

What was found

SHIP 5810 - PRES - AT FL350 LT ENG BLEED MESSAGE FOLLOWED BY RIGHT PACK OFF. BEGAN EMERGENCY DESCENT AND DECLARED AN EMERGENCY. PERFORMED QRH PROCEDURES RE-ESTABLISHED LT ENG BLEED AND R PACK IN STBY. REPLACED RT ENG 450 DEGREE OVER TEMP SENSOR, REPLACED RT FAN AIR TEMP SENSOR, REPLACED LT ENG 450 DEGREE OVER TEMP LIMIT SENSOR AND REPLACED LT ENG FAN AIR TEMP SENSOR REF B757 AMM 36-11. PERFORMED CK PER WC.