Service difficulty report · Valve · Boeing 737890

Difficulty date
March 31, 2019
Submitted
May 14, 2019
Operation
Air carrier
Aircraft
N590AS
Make and model
Boeing 737890
Aircraft serial
35687
Aircraft time
42,730 hours, 12,859 cycles
Engine
Cfmint CFM567B27B3
Part
Valve
Part number
32913903
Part serial
GRTS7604
Condition
Out Of Tolerance
Location
Nr 2 Engine
Part time
45,646 hours, 13,822 cycles
Stage of operation
IN
How discovered
9
Nature of condition
J
Precautionary procedure
K

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

What was found

#2 ENGINE SHOWS FAULT CODE 75-10592- TBV POSITION SIGNAL IS OUT OF RANGE. LONG TIME FAULT REF T/C 78273000. GROUNDED - YES. REF B737-800 FIM 75-23 TASK 802. F/C 75-10592 ACTIVE. TBV DATA SHOWS DEMAND AT 100%. POSITION AT 6%. FADEC 3 S/W. PERFORMED GVI OF J9/J10 HARNESS TO TBV. NO DAMAGE NOTED. REMOVED AND REPLACED #2 ENG TBV IN REF TO AMM 75-23-01. LEAK & OPS CHECK GOOD.