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SDR ASAA2017081321634

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Service difficulty report · Sensor · Boeing 737890

FAA SDR system

Difficulty date
August 13, 2017
Submitted
August 15, 2017
Operation
Air carrier
Aircraft
N569AS
Make and model
Boeing 737890
Aircraft serial
35184
Aircraft time
39,761 hours, 12,194 cycles
System (JASC)
3610 · Pneumatic Distribution System
Part
Sensor
Part number
1296942
Part serial
10937
Condition
Failed
Location
Nr 1 Engine
Part time
35,577 hours, 10,832 cycles
Stage of operation
CL
How discovered
O
Nature of condition
J
Precautionary procedure
O

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

What was found

DUCT PRESSURE SPLIT. DURING CLIMB LEFT 17 PSI, RIGHT 48 PSI. DURING CRUISE, LEFT 20 PSI, RIGHT 43 PSI. ACFT GROUNDED. PERFORMED FIM 36-10 TASK 804. ALL STEPS CHECKED GOOD UP TO PAR F(29). PER STEP F(29)(B). REPLACED THE NR 1 ENGINE 450 THERMOSTAT, IAW AMM 36-11-05. LEAK CHECKED GOOD. PERFORMED FIM REPAIR CONFIRMATION, ALL DUCT PRESSURES NORMAL AND WITHIN LIMITS OF GRAPH.